The Baby Twily and Mommy Celestia Chronicles

Chapters

B.B.B.F.F. (Shining Armor)
Octy and Vinyl (Octavia and Vinyl Scratch/DJ-PON-3)
Big Sis Velvet (Twilight Velvet)
Spity (Spitfire)
Dusty (Lightning Dust)
Maud (Maud Pie)
Moonie (Moondancer)
Professor Pampers (Cheerilee)
Little Lyra and Special Agent Sweetie Drops (Lyra and Bon Bon)
Coco (Coco Pommel)
Spike and Little Shiny (Spike and Shining Armor)
Limey (Limestone Pie)
Sunshine Smiles (Princess Celestia)
Bluebella (Prince Blueblood)
Little Marble (Marble Pie)
Little Sun Bun (Sunset Shimmer)
Baby Bright Eyes (Derpy)
Little Lulu (Princess Luna)
Clipper and Crash (Soarin and Rainbow Dash)

B.B.B.F.F. (Shining Armor)

Author's Note

Shining Armor's got no shortage of fics involving him in diapers or him regressing, so I figured it'd be nice to give him a bit of a break and let him be the more mature one for a change.

Allow me to explain how the voting for characters will work: I'm going to abide by a couple of restrictions.
1. The Cake Twins, Flurry Heart, the CMC and other school aged characters are off-limits as playmates. This is both because I don't want to get into any trouble using underaged characters with a fic that has the "Sex" tag (even if no actual sexual acts occur), and because I can't think of how I would make them work without needing to regress Twilight physically (and possibly mentally).
2. Prince Ecosis said in the original fic's comments that he would reject any votes for Starlight Glimmer or Discord, and I'm going to more or less respect such wishes. No Starlight in this fic also means no Sunburst or Trixie since it wouldn't feel right to have them but not Starlight.
3. Any characters introduced after the beginning of Season 6 cannot be included here, but anyone introduced before then is fair game barring any prior restrictions.
4. The rest of the mane six and Spike were already covered in the original fic, but they can be included as part of a group. Same goes for Cadence.
5. Each commentor is allowed only one vote, if you wish to change your vote you must specify that your previous vote is cancelled.

On the subject of voting, I'll allow voting for about a month and will likely publish the next chapter at the start of October unless I specify otherwise. Happy voting.

B.B.B.F.F. (Shining Armor)

When Twilight finally woke up after having slept in for Celestia knows how long, she was initially quite dismayed to find that there was nopony or any other creature waiting for her. No new playmate. There wasn't even a sign of her mommy anywhere. She was all alone, with only Smarty Pants for company.

Well, no matter, there wasn't anything that needed a mommy's immediate attention. As worried as Twilight might be by Princess Celestia's absence, she knew it was no cause for concern. Not yet, anyways. But the day still looked young, the sun wasn't anywhere close to being high in the sky. It was probably still morning, though it may not be that way for much longer given the sun's position.

"Looks like we have a little time to ourselves this morning, Smarty Pants." Twilight said to her doll as she slowly wiped the sleep out of her eyes, sat up fully in her bed and then got down while clutching her cherished object from foalhood tightly in her hooves.

Smarty Pants just replied. "Really? We're all alone? No Mommy? No playmates?"

Twilight nodded. "It sure looks that way, Smarty Pants. But I'm sure Mommy will be back before long. And until she does, we can play together and do whatever we want."

Yet just then, the door to the room swung open. And in trotted not only Princess Celestia, but also a very recognizable stallion to Twilight. Though the undergarment wrapped around his hindquarters did strike her as odd. It didn't look like a diaper, there were no visible tapes or landing zone. Still, those were matters for another time as the stallion cleared his throat and introduced himself. "Hey, Twily. Guess who got the day off to spend with you?!"

Twilight's eyes widened to the size of dinner plates, and she let out a happy shriek of joy as she embraced the stallion with a snow white coat! "B.B.B.F.F.!"

Princess Celestia flashed a warm and approving smile. "Yes, Twily. I figured you would appreciate the chance to see your big brother again."

Shining Armor couldn't help but snicker when he saw Twilight's diaper. "Still in diapers, huh, Twily? I thought for sure you'd have grown out of them by now," Then he added. "I can't believe you still have Smarty Pants. I thought for sure you'd have given her up by now. What, do you still sleep with her?"

Twilight couldn't help but blush. "What's wrong with that? Don't you still sleep with Brutus Force sometimes?"

"Who told you that?!" Shining exclaimed, before realizing what he was confessing to and he hastily corrected. "I mean... I have no idea what you're talking about."

"Oh, then what's this?" Princess Celestia asked as she levitated over a worn looking stuffed turtle. "I seem to recall you being very insistent that I let you bring this with you today, young colt."

At that Shining let out a happy whiney! "Brutus Force!" He forgot all about trying to save face! Using his magic, he pulled the stuffed turtle close and nuzzled it. "Oh, I've missed you so much, buddy!"

Smarty Pants couldn't help but laugh. "Guess Twily's not the only one in her family who has a snuggle buddy."

Twilight then questioned. "Are you sure it's okay to be here with me, B.B.B.F.F.? What about Cadence, and Flurry Heart?"

Shining waved a hoof. "Oh, don't worry about them. Cadence can take care of Flurry no problem. Don't forget, she's an experienced foalsitter. Plus, she's got Sunburst and an entire castle of guards and staff to help her out. She was quite insistent that she could manage alone," With a smile and a wink, he added. "She told me about your little secret. So, I decided to volunteer to be one of your playmates. You and Cadence had so much fun together. And I know we'll have even more fun together today."

Princess Celestia nodded. "I'm sure you both will. After all, I didn't just ask Shining Armor here for a playdate, Twily. I also wanted to request his help in keeping an eye on you today. I really can't think of anypony else who I know will keep you out of trouble."

At that the young alicorn gasped in realization! "Wait, you mean you're not going to be with me today, Mommy?"

The sun princess shook her head from side to side. "I'm afraid not, Twily. I'm going to be busy tending to a very important diplomatic matter. And if I took you with me to court, ponies might get the wrong idea."

"No!" Twilight protested with a whimper. "I'll be good, Mommy! I promise!" And she practically threw herself at the taller, older alicorn, desperately pleading. "Can't I go with you? Please?"

Celestia tried her best to keep a strong will and not let her composure break. She knew this was going to be difficult. But for Twilight's sake, she could not give in to the demand. "I'm sorry, Twily. But you have to know that I won't always be around for you. Sometimes, Mommy is busy or needs a break. That's why I'm officially tasking Shining Armor with watching over you. I know you'll be good for him."

Shining nodded in approval. "Yeah. And look at it this way, Twily. That means we'll have nothing and nopony to get in the way of our special playtime. It'll be just like old times, back when we used to play pretend together all around our house."

"Yeah, back before you started making goo-goo eyes at Cadence," Twilight playfully teased. Then she decided to ask something that had been nagging at her since she had seen Shining Armor come in. "But what is that thing you're wearing? It doesn't look like one of my diapers."

Shining flashed a toothy grin. "That's because it's not a diaper, Twily. It's a pull-up. And you know what that means."

"What? What does it mean?" Smarty Pants questioned. "What's the difference between a diaper and a pull-up?"

The pull-up wearing stallion proudly boasted as he puffed out his chest. "Oh, there's a lot of differences. But the biggest difference is that wearing pull-ups means you're in potty training. That means you do your pee-pees and poo-poos in the toilet, rather than in your diapers."

Smarty Pants seemed to be amazed if her tone of voice was any indication! "Wow! You can do that all by yourself?!"

"Yup," Shining Armor proudly proclaimed. "That's what big ponies do. And I'm a big pony. Unlike you, Twily."

Twilight frowned and stepped back. "Well, it's not like I don't ever want to use the potty. I just... like my diapers more, that's all."

"Hey, it's okay, Twily," Shining insisted as he stepped forward and put a hoof around her. "We can work on getting you to use the potty today, if you're feeling up to it. But if you don't want to, you don't have to. I don't mind changing your diapers. I've got plenty of experience from changing Flurry. And let me tell you, she can be quite the stinker."

"Well... you're no flower either!" Twilight playfully protested.

And Shining replied. "Never said I was."

Celestia smiled as she observed this playful bout of sibling squabble. It seemed like Twilight was slowly but surely accepting the idea of Shining Armor being her designated caretaker for the day, rather than the princess. "You two just have fun together, diapers or no diapers. Hopefully, this matter won't take all day," With that, she turned to depart the room. Though not before she waved and said. "Goodbye, Twily. Be a good little pony for your brother."

"Goodbye, Mommy!" Twilight waved in reply. And kept on waving until the sun princess had left the room, closing the door behind her. Just like that, Twilight and Shining Armor were alone together with only their stuffed animal companions for company.

It was Smarty Pants who tried to break the spell of silence that hung over the room after Princess Celestia's departure. Gazing in the general direction of Brutus Force, she waved to her fellow stuffed animal. "Hello, Brutus Force," She greeted in her most polite tone of voice possible. "I'm Smarty Pants, and I'm Twily's best friend."

Brutus Force didn't reply at all.

"Hey! Smarty Pants is trying to talk to you!" Twilight shouted at the stuffed turtle. "It's rude not to say anything back."

Shining Armor was quick to apologize as he picked up Brutus Force. "Sorry, Brutus Force isn't much of a talker. He's the strong, silent type. That's what makes him such a good listener."

Twilight blushed. "Oh, well that's okay. I guess not every companion can be like Smarty Pants or Boneless."

Shining nodded. "Yeah, some are more talkative than others. But Brutus Force is Brutus Force, and I wouldn't have him any other way," He smiled as he nuzzled the plushie some more. "Gosh! Brutus Force and I, we go way back! Oh, it feels so good to be able to play with him again!"

Twilight grinned. "I felt the same way when I finally got Smarty Pants back from Big Mac. I was so happy when he finally agreed to let me have her again."

"Yeah! And it meant I could finally stop being Winona's favorite chew toy," Smarty Pants commented. "Those were the worst months of my life. It's a good thing I'm so strong."

The young alicorn nodded ever so slowly. "Yeah. And now that I have you again, Smarty Pants, I've never letting you go! You and I, we'll be together forever and ever!"

Shining Armor smiled as he observed the heartwarming display of affection his little sister was showing. "I'm glad you still love Smarty Pants so much, Twily. You used to take her with you everywhere you went. And I still remember the day I gave her to you as a present," He wiped a tear from his eyes. "Oh, I feel so old just thinking about it! Look at me, getting all sentimental over some doll."

Twilight giggled, nuzzling up against her brother's chest. "Nonsense, B.B.B.F.F., that's what makes you you. And I wouldn't have you any other way."

"Aw, Twily! You always know just what to say to cheer me up, don't you?" The stallion happily replied as he embraced his sister in a hug. Then, when the hug ended, he trotted over to inspect his sister's diaper.

"Uh, what are you doing, B.B.B.F.F.?" Twilight questioned as she felt her diaper be pulled back with a hoof.

Shining was quick to explain. "Well, foals don't always know when they've gone number one or number two. I have to make sure you don't get a rash. How would I ever explain that to your mommy? She'd have my head for sure," He finished the diaper check just seconds later as he declared. "Well, you're dry and clean for now. Figured you were, but it never hurts to check," Then he turned his attention to his pull-up. "As for me, I think it's about time for me to use the bathroom."

"Oh, you have to go potty?" Twilight asked in a playful tone of voice.

Giggling at the childish term, the pull-up wearing stallion nevertheless nodded. "Yes, I certainly do, Twily," Then he got an idea. "As a matter of fact, maybe we should try to see about getting you on the potty as well."

"Are you sure?" Twilight hesitantly questioned as she looked at her diaper. "I kind of like my diapers."

Shining Armor sighed as he trotted over to his sister. "Aw come on, Twily. I promise I won't let anything bad happen to you. Besides, that one mishap with the potty, it was years and years ago."

But the padded alicorn protested. "But you remember, don't you?" And her mind began flashing back to a memory that she'd previously thought she had banished to the farthest corners of her mind.

A much younger (and much smaller for that matter) Twilight was waddling along through the house she lived in with her parents and her big brother Shining. For a foal her age, she was very curious and very eager to learn about everything she could. In fact, she was far ahead of her peers when it came to reading. That's how smart she was.

Suddenly, the foal happened to notice Shining Armor coming out of a room. A very peculiar room at that, because it seemed to have some strange objects in it that commanded her attention. Naturally, being curious, she decided the best course of action was to trot up to the nearest pony and start asking questions. So she waddled her way up to her big brother. "B.B.B.F.F.?" She asked him while giving him the biggest set of pleading eyes.

Shining (who was actually somewhat scrawny for a colt his age, it wouldn't be for at least another year before he would hit a growth spurt) looked down, his eyes immediately noticing his little sister. "Hey, Twily," He cheerfully greeted. "What's up?"

"What's that room you were just in?" Twilight inquired of her older brother. "It seems like you go into that room a lot. And so do Mommy and Daddy. But it's not a room I remember going into at all."

The colt looked back. "Oh, that? That's the bathroom. You've definitely been in there sometimes. That's where you have to take baths, after all."

The little filly adopted a puzzled look. "But, you weren't taking a bath, were you?"

Shining Armor shook his head from side to side. "Nope. I was just using the toilet, because I had to pee."

"What's a to... to..." Twilight struggled to get the word out that her brother had just used.

"A toilet? Well, it's what grown-up ponies use instead of diapers," The colt tried to explain. "Someday, you'll use it too."

Her curiosity piqued, Twilight asked her brother. "Can I see it?" The only thing better than learning a word was learning what that word was or what it looked like.

Shining was uncertain for a moment. But one look at his sister's face melted any will he might have had to say no. Scooping her up with his hooves, he said to her. "I don't see why not. Come on," He carried his little sister into the bathroom, and set her on the floor in front of a tall, white colored object that appeared to be made out of some kind of stone. "See that?" He gestured to the object. "That's a toilet."

The little filly examined the object carefully. It appeared to be a mix of a chair, a box and a bowl. Above the bowl was some sort of lid, and off to one side there was a silver colored thing. Connected to the back and the bottom of the object were what appeared to be pipes that were built into the nearby wall. After inspecting it, however, she was still puzzled. "I don't get it."

The little colt did his best not to laugh. As smart as his sister was, she was only two. There were bound to be things she wouldn't understand just yet. "You will someday, Twily. After all, Mom and Dad say you're just about ready to start potty training," Then he got an idea! "Wait, I know! We could start your training right now! You could try to use the toilet! You're so smart, I bet you could get it right on your first try!"

With the idea planted in her head, Twilight eagerly agreed! "Yeah! Let's try it!" But then she blushed as she realized she didn't have a clue as to how "potty training" was supposed to work. "Uh, how do I do it?"

Shining Armor smiled and happily explained. "It's really simple: You just take off your diaper," He used his magic to remove his sister's diaper and carefully set it aside. "Then, you sit down on the seat," He proceeded to lift up the lid, exposing some kind of curved horseshoe opening above the bowl with water flowing underneath it. Once he'd done so, he placed Twilight carefully on the seat with her rump hovering over the bowl and her legs dangling off to either side. "And then, you just do what you do in your diapers."

"Is that all?" Twilight asked as she sat on the seat.

"Well, then you have to wipe and flush, and then you wash your hooves," Shining told his sister. "To wipe, you just use some toilet paper," He proceeded to float over a white, papery substance divided into squares. "And to flush, you just press the handle down," He deposited the toilet paper into the bowl and directed his sister's attention to the silver object from before. "Just like this."

There was a click, and then what sounded like a roar (at least to Twilight's unprepared ears). Twilight looked down, seeing the waters in the toilet bowl swirling around in a dizzying motion. Then, suddenly, they swirled down a hole at the bottom of the toilet bowl and disappeared. But then the waters slowly returned as if nothing had happened. And the whole thing had unfolded in just a few seconds.

Needles to say, the little filly was extremely fascinated, eager to learn more about this strange contraption.

"So, what do you think, Twily?" Shining Armor questioned. "Wanna give it a try?"

Twilight nodded. "Uh-huh," And she boasted. "I wanna try it all by myself!"

The colt blinked in surprise. "You sure you don't want my help, Twily? It's okay, I don't mind it. I still sometimes need help from Mom and Dad when I use the toilet."

But the unicorn filly was quite insistent. "I don't need help!" And the look she shot made it quite clear she wasn't going to change her mind.

Reluctantly, Shining decided to respect his little sister's wishes. "Okay. But I'll be waiting just outside the bathroom if you change your mind. And don't feel bad if you don't do anything. What matters most is that you try." Then he trotted out of the bathroom, shutting the door so as to give Twilight some privacy just in case she did do something.

Unknown to Shining, he had just given his little sister the chance to do something that most ponies never would've even thought of. There was still something nagging at the filly as she sat on the toilet. What was that hole for? It had to be there for a reason. It seemed quite silly for something to have a hole in it for no reason. And was it related to the motion of the water in the bowl?

Well, there was only one way to find out. Twilight turned towards the silver handle, recalling that her brother pressing it down was what had caused the toilet to "flush" last time. And the "flush" was what made the waters swirl around before disappearing down the hole (before returning, of course). The hole had to lead to somewhere. Ponies obviously wouldn't use something like this if it didn't get rid of their waste somehow.

So it was that the unicorn who was no more than two reached out across the seat to grab the handle. With all of her might, she forced it down to trigger the flush. Just like before, there was a loud noise and the waters in the bowl began to spin around and around. Soon, they would retreat down that hole.

Without hesitating for even a second, Twilight stood up on the seat and then jumped from it down into the bowl. She landed with a splash! As the flush cycle continued, the filly felt herself be swept up by the spinning, surging waters. It also felt like there was something tugging on her from below, trying to pull on her. She didn't try to fight it, this was the only way she could find out how the toilet worked.

The flush cycle began to end as the waters retreated down the bowl, taking Twilight along with them. Down, down, down she descended. All the while the hole at the bottom drew closer and closer! Suddenly, the powerful tugging sensation grabbed hold of the filly by the tail! The next thing she knew, she was swept down through the hole as everything went dark! All she managed to force out was a garbled cry.

Then and only then did the flush cycle end. The waters in the toilet bowl refilled. But Twilight had disappeared!

Shining Armor had heard the flush, but had thought nothing of it. Only when the flush cycle ended did he call out through the bathroom door. "Are you all done, Twily? Do you need any help wiping?" He waited, but there was no reply. Seconds past. "Twily?" He called again, and again received no reply. That struck him as odd.

The colt pushed open the bathroom door, expecting to see his little sister on the other side. But she was nowhere in sight. Her discarded diaper lay on the floor, and the lid of the toilet was still up. The seat remained as it had been before, but there was no indication as to Twilight's presence anywhere.

That's when it hit Shining! He'd thought he'd heard some kind of cry just before the flush cycle ended. "No! She didn't!" He thought to himself, but there seemed to be no better explanation as to his sister's mysterious disappearance. Either accidentally (or more likely intentionally), she had flushed herself down the toilet!

Shining Armor frantically rushed out of the bathroom as panic filled every ounce of his being! "I've got to save Twily!" He said to himself!

The flashback ended as the Sparkle siblings and their plushie pals entered the castle bathroom together. "Come on, Twily," Shining Armor insisted as he approached the toilet. "I won't let you go down the drain again. You're too big to fit down it, and so am I."

"I... I know that," Twilight protested in a hesitant tone of voice. "But still... using the potty instead of my diapers..."

Shining just pulled down his pull-up as he lifted up the lid of the toilet. "Just do what I do, Twily. You'll see. There's nothing to be scared of." He proceeded to plant his bare bottom upon the toilet seat.

Twilight watched with hesitation and concern. "Be careful, B.B.B.F.F.!" She seemed to whimper.

The stallion wasn't concerned or worried in the slightest as he relaxed. Soon, a hissing sound could be heard that seemed to echo across the entire bathroom. But it faded after a few seconds, at which point Shining Armor raised his hooves above his head and proudly proclaimed in a childish tone of voice. "I went potty!"

"Oh, you're so brave!" Smarty Pants exclaimed with exaggerated praise.

"He is, isn't he?" Brutus Force remarked.

Shining nodded. "Yup. Gotta be brave to be a royal guard and marry a princess. You think Cadence would want anything to do with me if I were still in diapers?"

Twilight giggled. "Oh, I don't know. I think she'd love marrying a big foal to take care of."

Shining Armor only snickered back. "Very funny, Twily," Then he rose from the toilet and gestured a hoof to the seat. "Now come on, it's your turn. Just waddle over here and give it a try."

"Come on, Twily! You can do it!" Smarty Pants encouraged. "Even I used the potty once, remember?"

The padded alicorn sighed, realizing that both her brother and her best friend had a point. This was something she had to do, or at least try to. Her brother was in charge, and he'd promised he wouldn't let anything bad happen to her. And whenever he'd made that promise in the past, he had kept it. So, carefully and slowly, she waddled her way towards the toilet. "I'm not really afraid of it, am I?" She thought to herself with concern. "It's just part of the act, pretending to be afraid, right?"

"That's it! Come on, Twily!" Shining Armor encouraged, sounding more like a father trying to get his child to take their first steps. "I know you can do it! Just a little bit closer!"

The young alicorn hesitantly took a few more steps forward. The toilet almost seemed to be taunting her, as if it were saying "Sit down on me. I dare you!"

"Just a bit closer, Twily! You're almost there!" Shining encouraged as he saw his sister waddle so close he could almost reach out and touch her if he wanted to. But he didn't, he just stood by the toilet and motioned for her to approach him.

Shutting her eyes, Twilight made one more big effort and took a few more steps forward! She was soon rewarded for her efforts as she felt herself be lifted into the air by her brother's hooves! In one swift motion he pulled down her diaper and deposited her onto the toilet seat!

Twilight, for her part, just concentrated as best she could. She eventually managed to force herself to pee, just a little bit.

"Well done, Twily!" Shining Armor cheered and clapped his hooves! "See how easy and fun that was?"

With a blush forming on her cheeks, Twilight playfully admitted. "Yeah, I guess it was. You were right all along, B.B.B.F.F.!"

"Of course I was, Twily!" Shining insisted, and then wiped another tear from his eyes. "Gosh, it really does bring back memories. You grew up so fast. Seems like only yesterday I was teaching you how to wipe your plot."

"Oh come on, you're not that old." Twilight teased as she got up from the toilet, wiped herself clean and flushed the toilet. Then, she and Shining Armor made their way over to the sink and washed their hooves together. Afterwards, Twilight had her diaper put back on, and the two exited the bathroom. They still had a lot of playtime together, after all.

Before leaving the bathroom, Twilight took one last look at the toilet. Something continued to nag at her regarding her "fear" of the porcelain throne. She kept telling herself it had just been part of the act, but something in the back of her mind couldn't help but think. "Was I actually afraid of it? Did I really believe it was a monster that could eat me? Have I really just been acting the part of a foal this whole time, or have I been somehow started becoming one?"

"Twily, you coming?" Shining Armor called. "Or do you have to do a poo-poo?"

The padded alicorn shook her head to clear the mental cobwebs. "I'm good, B.B.B.F.F. Just... thinking about something, that's all." And she pushed her worries to the back of her mind, they could wait until after playtime. She remembered that playtime with her brother always made her feel better, it could always be counted to take her troubles away.

Princess Celestia tried her hardest to keep her focus on the diplomatic matters at hoof during the long meeting. But she still couldn't help but find her thoughts drifting back to Twilight. This was even harder than the times she'd had to go to court, and had reluctantly left Twilight alone for a little while.

The sun princess did her best to tell herself that this was what was needed for the both of them. "Besides," She thought to herself. "You left Twily in perfectly capable hooves. Shining Armor certainly knows his way when it comes to foals."

Even so, when at last the meeting was concluded and the delegates had departed, Celestia felt as if she'd had an enormous burden lifted from her. With a smile and a spring in her step, she happily raced back to the private suite Twilight was staying in, ready to embrace her foal again, hold her close and do all sorts of motherly things!

When the alicorn with a majestic white coat reached the suite door and forced it open with her magic, she was hardly prepared for the sight that greeted her eyes!

Smarty Pants was sitting in a small pen of some sort, almost like a jail cell you might say. And Brutus Force was standing in front of Smarty Pants, clutching a ruler in one appendage.

"Help me, brave knights!" Smarty Pants cried out! "This dragon won't let me go! And he has really bad breath!"

"Rawrrr!" Brutus Force roared in an exaggerated tone of voice! "Me dragon! Me no like ponies and knights!"

Standing behind a hastily erected fort of pillows, Twilight and Shining Armor could be seen with paper hats on their heads and toy swords held firmly in the glow of their horns.

Suddenly, with a cry of "Charge!" the two ponies emerged from the safety of their pillow fort, their swords at the ready! They swung their swords hard into the "dragon" that was Brutus Force, knocking him down!

"Take that, dragon!" Shining Armor declared in an exaggerated, booming tone of voice. "You shall not kidnap fair maidens on our watch!" And then he pushed his sword towards Brutus Force's chest in order to "slay" the plushie.

Brutus Force fell to the ground, proclaiming in a very over the top way. "Oh, I am slayed! Curses!"

Twilight, meanwhile, raced to the pen and lifted Smarty Pants out. "Have no fear, Princess Smarty Pants. Your brave and loyal knights are here to rescue you."

"Oh thank you, brave knight!" Smarty Pants said as she was carried to safety by Twilight. "You are my hero!"

And when Twilight rejoined her brother, they stood over their defeated enemy and proclaimed. "The royal knights save the day once again!"

Princess Celestia had observed the whole thing, and couldn't help but applaud the performance. "Bravo! Bravo!"

That caused Shining to break character as he blushed. "Oh, how much of that did you see, princess?"

Celestia giggled. "It's quite alright, I won't tell anypony. It seems like you and Twily have had a fun day together."

"Uh-huh, Mommy!" Twilight beamed. "B.B.B.F.F. helped me use the potty today. I actually did a pee-pee in it! But I like my diapers better, the potty just isn't as fun."

"Oh, that's alright," The sun princess cooed in a motherly tone of voice. "You can stay in your diapers if you want to, Twily. Mommy doesn't mind changing you, no matter how stinky you get. All the same, I'm very proud of you for facing your fear of the potty head on and learning that it is nothing to be scared of."

Shining Armor smiled. "It was great practice for when Cadence and I will have to potty train Flurry Heart, not that I think we'll be doing that anytime soon."

"I hope she doesn't ever potty train!" Twilight teased. "I hope she stays in diapers forever! Diapers are so much fun!"

"Let's not give her any ideas, Twily." Shining protested

Princess Celestia just winked. "Oh, don't worry. I know you and Cadence will raise her right. And I'm sure her Auntie Twily will be happy with her no matter what she does."

"Oh yeah, Cadence told me about Flurry's 'first words'," Shining realized. "That was you, wasn't it?"

Celestia nodded. "I'd be more happy than to do something nice for you, Shining. You deserve a reward for helping out today."

The stallion shook his head from side to side. "Just getting to play with Twily again is reward enough, your majesty. It was a lot of fun, really," But then he put a hoof to his chin. "Although, I wouldn't necessarily mind doing it again someday, but only if Cadence got to be part of it too. I'd hate for her to miss out on the fun."

The sun princess smiled anew. "I'll keep that in mind." In the back of her mind, however, she couldn't help but think. "Twilight seems to have been okay without me. But is that just because her brother was acting more as her caretaker than her playmate?"

Octy and Vinyl (Octavia and Vinyl Scratch/DJ-PON-3)

Author's Note

Tiber Septim II, when he (or she) voted for Octavia, specifically suggested the idea of Octavia and Twilight playing, listening to, and singing music. So when Octavia (and Vinyl Scratch) won the first round of voting for this fic, I decided to go with that idea for this chapter.

Octavia's punishment is a reference to another padded pony work, Indiscreet Shipping, as well as to its much more NSFW sequel The Best Week Ever. I highly recommend the former, it's one of the all time best padded pony works in my opinion. I also threw in some references to Deviant Art user bobthedalek, who's done lots of fan art involve Octavia and Vinyl, as well as his own O.C. parents for Octavia.

Now, since Twilight Velvet, Spitfire, and Moondancer were all voted on in the first round, I'm going to count each of them as having received half a vote here. That way, if other characters that have not been deemed ineligable are voted on that weren't voted on in the previous round show up, they'll be favored. But you can vote for those three characters mentioned above if you want. And as always, be sure to suggest any ideas for what you might like to see Twilight do with her next playmate/playmates. Like last time, voting lasts a month from when this chapter is uploaded.

Octy and Vinyl (Octavia and Vinyl Scratch/DJ-PON-3)

Twilight had thoroughly enjoyed playtime with Shining Armor, it had really made her feel young again. Well, younger than she normally felt going through all of this with Princess Celestia. She was a little sad her big brother couldn't stay and play longer, but he had his grown-up responsibilities to tend to.

Fortunately, the padded alicorn wouldn't have to wait long for her next playmate to show up. The very next day, she was awoken from her slumber by the sound of a crash. It wasn't a particularly loud or violent crash, but it still startled her due to being so unexpected!

An unfamiliar, posh sounding voice suddenly spoke up. "Sorry, I didn't expect my cello to be so heavy. In my defense, I was not expecting to be called here so soon. I thought I wasn't scheduled to perform for at least another day."

And a far more laid back voice chimed in. "Really, Octy, you didn't have to bring it here. Foals shouldn't be handling such heavy things. You could've gotten a boo-boo."

Twilight spun around, suddenly finding herself face to face with a brownish-gray coated earth pony with a blackish-brown mane and tail, and a lilly white coated unicorn with a cobalt and electric blue mane and tail. Their cutie marks were music related, both depicting musical notes and symbols. And (much to the alicorn's relief) both of them were already wearing diapers. Pretty thick diapers from the looks of it.

A slight blush formed on the earth pony's face despite the fact that she was not the only pony in the room wearing diapers. "Oh... Princess Twilight!" She exclaimed as her eyes widened. "My apologies, I thought I was being called to the castle for a private performance for Princess Luna. Her birthday is coming up, after all."

"Guess it's a good thing I decided to tag along today, huh, Octy?" The unicorn said with a smile as she swished her padded rump around. "Something tells me that we're not here to give a performance."

"Indeed you are not," Princess Celestia declared as she came trotting up on the scene with a motherly smile. She looked to Twilight and happily told her in that motherly tone. "I hope you don't mind, Twily. I was thinking about who to invite for your next playdate, and I just happened to remember a certain..." She coughed into a hoof. "Incident in Ponyville not too long ago."

Twilight's wings went wide with shock! "Really?! What happened?!"

The unicorn chuckled. "All you need to know is that Octy here," She gestured to the earth pony. "Gave a certain no good jerkface what he deserved. Obviously, his mommy never taught him manners. I just wish I could've been there in pony to see Octy put that guy in his place."

Princess Celestia coughed into a hoof as she cleared throat. "Yes, well, after... that," She explained. "I still reluctantly had to punish Octavia Melody here," It was possible to see the earth pony mare blush anew. "She was to perform for my sister's birthday party, and as punishment she was to wear a diaper until after said party. Since she was already here in Canterlot, I thought it wouldn't hurt to invite her here to be your playmate for today."

"And don't forget me!" The unicorn eagerly chimed in with a toothy smile. "You probably know me as DJ-PON-3, but today I'm just Vinyl Scratch, or Vinyl for short. I'm Octy's roommate and best friend. If it weren't for me, Octy would've probably never gotten in diapers: Wearing 'em and using 'em."

Octavia looked down at her padding. "Well, I must admit they are cheaper and far less troubling than other methods of stress relief. And not having to worry about needing the washroom is helpful, I suppose."

Celestia then chimed in. "I'm glad to hear that, seeing as the bathroom will be off limits without adult supervision. I very well can't risk any mishaps or other accidents. But it's okay, I don't mind changing anypony. I'm more than used to it with Twily."

Twilight then happily threw her hooves around her fellow alicorn, hugging her tightly. "Oh thank you, Mommy! I get two playmates on the same day! I'm so lucky to have you!"

Princess Celestia just smiled, stroking Twilight with a hoof not unlike the way a mother would with their child. "I'm the lucky one, Twily. You are the cutest, most amazing foal I've ever known. I'm proud to be your mommy for as long as you need me."

"Ooh!" Twilight suddenly got an idea as her eyes lit up! "I have to tell Smarty Pants about this! Boy will she be surprised!" She promptly raced over to her bed, and retrieved the well worn stuffed donkey. "Hey Smarty Pants, guess what? Mommy's brought two new playmates here today. And they're both into music."

Octavia and Vinyl were more than a bit surprised at first to hear Smarty Pants actually talk (even if it was more or less just through Twilight throwing her voice). "Oh, that's cool. That means we can do all sorts of fun things with music: Listen to it, play it, even sing along to it. Did you know I used to sing to Twily all the time when she was on the potty? Without my singing, she couldn't even tinkle."

"Smarty Pants!" Twilight playfully whined. "Don't tell them that, they don't need to know. Besides, I don't really use the potty anymore. I like my diapers better."

Vinyl Scratch just chuckled. "Hey, it's okay. Octy sings in the shower all the time, so singing in the bathroom isn't a weird thing at all if you ask me," Then, poking her padding, she added. "And I agree with you, Twily, diapers are so much better than potties. Once I started wearing diapers at my gigs so I didn't have to worry about bathroom breaks, I never looked back. Trust me, the public bathrooms at some of the clubs I've gone to have been really bad."

"So, how long have you and Smarty Pants been like this, if I may ask?" Octavia questioned in uncertainty. "Obviously, I don't have as much experience in all of this stuff compared to you and Vinyl. I only attended my first playdate about a day or so before that... event in Ponyville that got me in trouble."

Twilight smiled as the padded alicorn proclaimed! "Oh, I've been doing this with Mommy for quite a long time now. I don't know exactly, I've lost count. But every day I've been doing it has been the best day ever! I can't wait to have another day of fun with you both: Octy and Vinyl."

Smarty Pants then saw fit to ask. "So, what was that noise Twily and I heard earlier? I know it startled us. I'm honestly surprised Twily didn't pee-pee herself in fright."

Octavia broke out into a raging blush as she gestured to a well worn case lying on the floor behind her. "That's my cello. I brought it here because I thought I was going to be performing for Princess Luna. Although now, I suppose I could get in a little bit of practice with you and Vinyl. My cello is a bit big, but I actually learned how to play it when I was an actual foal. My mum made me take lessons when I was just two years old. Potty training came along a little later."

"Meh, potty training's overrated," Vinyl shrugged. "But I'm glad I brought along some of my old tapes. They've got all the songs I loved to listen to as a foal. Figured they might help Octy find some inspiration, or just help her get into the mood."

"Can we listen to them?" The padded alicorn princess inquired in a hopeful tone of voice.

"Well, how about we have breakfast first, then you three can do whatever you want," Princess Celestia proposed to the three padded ponies in her presence. "I got so much work done at my day court yesterday that I don't actually have to go back if I don't want to."

Octavia seemed to nod in approval. "Breakfast does sound good. I didn't exactly have a chance to get something to eat this morning since I was in such a rush."

"I'll say!" Vinyl chuckled and snickered as the off-duty DJ pointed out. "You were in such a rush you didn't even notice when you'd piddled your pampers. Good thing you had me to change you. Wouldn't have wanted the entire castle staff to know about our little secret." She delivered the last line with a knowing wink.

"You were wet too, Vinyl." Octavia protested, but to no avail.

Princess Celestia led her charges to the castle's main dining room, which was thankfully void of other ponies at the current moment. "Get comfortable, my little ponies," She cheerfully told them. "There should still be some breakfast leftover from this morning. And if not, I'll happily make it for you myself."

Twilight sat at one end of the large table, giggling as her diaper crinkled and compressed as she wiggled about in her seat. Smarty Pants was seated right next to her. "Whoa! This chair is super soft!" She exclaimed to the stuffed donkey.

"Everything feels soft to me, Twily, remember?" Smarty Pants reminded the alicorn.

"I know. I wish you could feel things like this. This is probably softer than anything you're used to," Twilight commented with a dreamy sigh, occasionally using her hoof to poke at her padding. "How about you two?" She asked the two padded musicians.

Vinyl was leaning back in her chair at the other end of the table, allowing her rear to sink into the seat of her diaper. "I wish it was a high-chair, that would really make the experience feel authentic."

"Do they even make high-chairs for big foals such as us?" Octavia pondered as she sat next to Vinyl, still looking a bit uncertain. "Are we sure we should be doing this? That we're not intruding on what the princesses have going on between them?"

The padded unicorn reached out a hoof as she leaned over, reassuring her friend. "Hey, don't be nervous. Twily obviously doesn't mind, and neither does Princess Celestia. Just relax, Octy. Think of this as a much needed vacation. We can use this time to take a break from all those big pony responsibilities that keep us up at night."

The earth pony mare reluctantly agreed. "If you say so."

Just then, the dining room doors swung open. In trotted Princess Celestia, pulling a large cart behind her with her magic. She was also levitating over some bibs, tying one each around the necks of Twilight, Octavia, and Vinyl Scratch. "Wouldn't want anypony making a mess of themselves." Then she floated over three large bowls that had steam rising from them.

"Is that what I think it is?" Twilight asked as she eyed her bowl with excitement.

The sun princess happily nodded. "Yes indeed, it's oatmeal. And it has honey, cinnamon, and fresh strawberries. Just the thing for growing foals to get their nutrition," She proceeded to float over three red colored plastic spoons. "Now, can you feed yourselves, or do you want Mommy to feed you?"

Immediately, the padded alicorn threw up her hooves. "Feed me, Mommy! Please!" She adopted the best pair of pleading puppy dog eyes imaginable.

Celestia couldn't say no to such an adorable face. She trotted over to Twilight's position and sat down next to her, ready to begin the spoon feeding. As she did so, she could see Vinyl Scratch already tossing her spoon aside and using her hooves to eat the oatmeal. Octavia, after some noticeable hesitation, did the same.

Twilight, for her part, happily cooperated with her fellow alicorn on spoon-feeding. She opened up her mouth as wide as possible, allowing the sun princess to deposit spoonful after spoonful of yummy oatmeal onto Twilight's tongue. The honey, cinnamon, and fresh strawberries all created a delicious blending of flavor! Oatmeal had never tasted so good!

Sooner than either princess would've liked, however, the spoon-feeding came to an end as the bowl was depleted completely of its contents. Still, it had been fun while it lasted.

"Now, how about some milk to wash it all down?" Princess Celestia proposed to her fellow alicorn.

Twilight knew what her fellow alicorn meant, but it was a bit hesitant. "Are you sure we should do that in front of Octy and Vinyl?"

The sun princess looked across to the other two padded ponies, who seemed fully occupied licking the last bits of flakey oatmeal from their hooves. "I don't think they're paying any attention to us. We'll have to make this quick, though." And she exposed her teets.

Twilight, with practiced precision, latched onto one of Celestia's teats and began to suckle. It wasn't long before the taste rich, creamy milk was on her tongue. She closed her eyes, listening to the rhymtic sound of Celestia's heartbeat as she timed her suckling to it.

"Okay, Twily," Princess Celestia said after almost a whole minute had gone by. She gently weaned the padded alicorn off the teat as she said in that motherly tone of hers. "That's quite enough milk for you for now. We don't want to upset your tummy."

The padded alicorn, though disappointed that the breast feeding had been so brief, reluctantly agreed. "Okay, Mommy. But your milk was really, really good! It tasted like cake!"

Celestia chuckled. "Oh, it did, did it? How odd. I didn't know my milk could have that kind of taste to it. Perhaps it's the lactating pills I've been taking to help me produce milk more easily."

"Mommy take medicine?" Twilight questioned with concern.

"Just for breastfeeding," The sun princess reassured her charge. "It's what mommies do for their little ones sometimes," Then she turned her attention back to Octavia and Vinyl. "Now, if you'll excuse me, I have a few messy fillies I need to clean up. Just sit right there until I get back, Twily." And she then rose from her seat at the table in order to go wipe off the faces of the two padded musicians.

After breakfast was over, Celestia led her padded charges back to the guest bedroom Twilight was staying in. She made sure to lock the door securely behind her so that nopony could barge in unexpectedly. Then she encouraged the trio. "Go ahead, go play your music. I'll be right here if you need anything."

Vinyl smiled, allowing her violet eyes to grow big as she took hold of both Twilight and Octavia by the hoof. "Come on, I've got so many tapes I wanna show you!" Soon, she had brought them before a brightly colored box. Opening the locks with her magic, she revealed a wide variety of colored cassette tapes. There was also a bright red tape player/recorder, and a pair of matching headphones.

"I can't believe you actually held onto those old tapes, Vinyl," Octavia commented in an odd mix of surprise and light mockery. "Tapes like those haven't been used in ages. These days, it's usually records, though CDs are also popular."

The off duty DJ's smile just grew bigger and brighter. "Well, these tapes were all the rage when I was a foal. I remember my parents used to play them for me all the time: When I was being put for naps or going to bed, when I was being too much of a hooful and needed to calm down, or even when we went on really long carriage rides together," Lighting up her horn, she soon settled on a bright yellow colored tape. "And guess what? This old tape player still works. Sometimes, I'll pop in a tune or two to get me in the mood." She promptly popped the tape into the player and pressed the play button.

The player clicked and came to life. Soon, music could be heard emerging from the speakers near the bottom of the device:

Row, row, row your boat,

Gently down the stream.

Merrily, merrily, merrily,

Life is but a dream.

"Think that's cool?" Vinyl said with a grin. "Check this out!" She used her magic to press the fast forward button on the player, then stopped it on a whim. A different tune started to play:

Ninety nine buckets of oats on the wall,

Ninety nine buckets of oats.

Take one down, pass it around,

Ninety eight buckets of oats on the wall.

Ninety eight buckets of oats on the wall,

Ninety eight buckets of oats.

Another press of the fast forward keep, followed by another sudden stop brought yet another tune on:

The wheels on the cart go round and round,

Round and round, round and round.

The wheels on the cart go ground and round,

All through the town.

"Vinyl, these are basic foal songs!" Octavia seemed to blush ever so faintly. "Don't you have anything less... kiddie?"

"I told you, these tapes were really popular when I was a little filly," Vinyl replied as she shrugged off the comment. "This is actually one of the special tapes my parents made for me," She proceeded to use her magic to stop the tape, pull it out of the player, and present it to both Octavia and Twilight. "See?" Scribbled in barely legible black letters were the words "Vinyl's Special Tape #1: Vinyl's Favorite Songs"

Twilight grinned. "My first mommy didn't really do songs for Shining and I when we were little, but she did have stories she used to tell us. They were always so wonderful: Stories about things like a rainbow of darkness, and witches, and ponies going on adventures to distant lands," A lone tear came into her eyes as she recalled. "I should've asked her to write them down somewhere so I'd always have them. I can't remember the last time I heard them, but it has to be have been years."

Octavia reached out a hoof to calm her fellow padded mare down. "Hey, it's alright. I'm sure your mother still recalls them to some extent and would be happy to write them down for you if you asked," She then commented. "My mother actually kept a lot of the things I had when I was a foal. Apparently, the doctors told her that after she had me, she couldn't have another foal again. That would explain why she's been almost over eager to see me have foals of my own."

Vinyl giggled. "Your mom's pretty weird, Octy. But hey, moms are like that. My mother and father made the tapes for me because they were always busy with their work, my big brother had to care for me. He was the one who got me into music in the first place. He was a DJ too, and he still performs for special occasions sometimes."

Smarty Pants, meanwhile, was rummaging through the collection of tapes the off duty DJ had brought with her. "Wow!" She commented as she carefully set various colored tapes aside. "Seems like your parents made a lot of these tapes, Vinyl! There's a tape of your favorite sounds, a tape of your favorite lullabies, even a tape of some potty training songs. I wonder if any of them are like the ones I used to sing to Twily."

Now it was Vinyl's turn to look embarrassed. "How did that get in there?!" She exclaimed in shock as she hastily snatched up a bright white colored that had the words "Potty Time" written on it. "Ugh, that's the one tape I didn't wanna bring with me!"

Octavia donned a goofy grin. "Now I'm quite curious as to what sort of songs your parents could've had recorded for you on a tape like that. I don't recall songs being a part of my potty training experience."

Vinyl quickly sought to change the subject. "Well, there's plenty of other tapes to listen to. I've got taped recordings of some of the biggest musical acts from when I was growing up. Some of these songs haven't been re-released in years!"

But Twilight got an idea! "How about, instead of just listening to tapes, we make our own tape for my mommy?"

"You mean, for Princess Celestia?" Octavia questioned, and got a confirming nod in return. "Sort of like a private concert? We make a tape of us performing a song?"

"Why not? You still have your cello with you, right?" Vinyl pointed out, gesturing to the case the aforementioned instrument currently resided in.

"But we don't have any other instruments," The earth pony mare protested. "We can't have a concert with only one instrument."

Smarty Pants then giggled. "We have all the instruments we need right here."

Octavia blinked in confusion. "What are you talking about? I don't see any instruments besides my cello."

Twilight chuckled as she waddled over to Octavia. "Duh, the instruments exist in our imagination. We can play any instruments we want. We don't even need to practice," Then she giddly proclaimed! "Ooh! I have an even better idea! Instead of taping our concert, we do it live for Mommy! She'll love it!"

Vinyl began to beam from ear to ear. "Hay yeah! Now you're talking, filly! The only thing better than taping your own music, is playing your own music yourself!" Then she put a hoof to her chin, deep in thought. "But what song should we do? It's got to be something that'll sound good with Octy's cello. Too bad foals don't know how to use turntables, because if I had my turntable I could mix up some really sick beats for us."

Octavia, meanwhile, had trotted over and opened up her cello case. With a fair bit of effort and clumsy waddling, she was able to drag the heavy instrument over to where Twilight, Vinyl, and Smarty Pants were all seated. She managed to catch the tail end of their conversation. "You know, all this talk about foals and foalish things has actually gotten me thinking. I do seem to remember this one incident at a certain gala a few years back."

At that the padded alicorn's face became flush with shame, it was even possible to hear a faint hissing sound as she peed a little bit from the sudden embarrassment. "That was Pinkie Pie, not me!"

"I know, and I'm not mad," The cello playing earth pony reassured the padded alicorn princess. "It did liven things up a bit. I believe that song was called 'The Pony Pokey' if I'm not mistaken."

"Oh, 'The Pony Pokey'," The unicorn mare commented in amazement. "I'm impressed you remember a song like that, Octy. As a matter of fact, I helped bring that song back into the mainstream with a rocking club remix. And your gala incident was just the inspiration I needed," She smiled, looking at Octavia. "What would we ever do without each other, Octy? Feels like we were meant to be. Heck, now we can even say we've been together since we were in diapers."

Octavia waved a hoof, playing off the compliment. "Oh Vinyl, it's nothing, really. I'm flattered you could find inspiration even from something I found rather embarrassing at the time," Then she happened to notice the off duty DJ's flanks, and a noticeable detail about the diaper currently wrapped around. "Speaking of diapers, did you know you just wet yourself, Vinyl?"

The off duty DJing unicorn looked down, noticing a faint yellow tint to her previously pristine white diaper. "Guess that just goes to show how much I've gotten used to wearing and using my pampers. Didn't even realize I'd opened my floodgates," She then sat down, causing her diaper to squish. "Wow! I must've soaked it more than I thought!" She looked across to Octavia. "Well, what are you waiting for? You know we're not allowed to use the potty. Aren't you gonna feel weird being the only one not getting changed?"

"Come on! It's easy!" Twilight declared as she patted her soggy diaper. "Just let it all out!"

"It's okay, Twily was just as nervous about it the first time she decided to do it," Smarty Pants reassured the earth pony. "I promise, we won't look." She covered her button eyes with a hoof and turned her head. Twilight and Vinyl promptly turned their heads too so as to give their friend the privacy they felt she needed.

Octavia sighed deeply. She didn't have much experience using her diaper, and unlike last time she didn't have the luxury of being distracted by a playtime fantasy. She shut her eyes, trying to remember the trick she'd read once about imagining a waterfall (despite not having the sound of running water that had been recommended). She spread her legs out almost involuntarily, hoping that if she relaxed her posture her body would be less likely to fight against her. It took a long time as the cello playing earth pony stood there in silence, why was she so pee shy all of a sudden?

Finally, however, the proverbial dam burst. Octavia's bladder finally emptied itself in a steady stream, the hissing became rather audible as a result. Her diaper subsequently swelled up as it absorbed the pee as best it could, soaking it all up like a sponge. Slowly but surely, the stream died down until it was a faint trickle. And then it stopped for good. She sighed in relief, taking in the feeling of a wet diaper. Sheepishly, she declared. "I'm... I'm done, I think."

Vinyl was the first to take notice of her friend's deed. She grinned and winked. "See? That wasn't so bad, was it?"

"N-no, it... wasn't." Octavia seemed to reluctantly agree.

Twilight smiled. "Now we can all get changed, and then we can start practicing for our concert for Mommy. She'll love it!"

A trio of diaper changes soon followed, and then the three freshly padded ponies went back to preparing for the concert they had agreed to put on.

Of course, Princess Celestia had overheard everything and knew about the concert. But she feigned ignorance all the same. "Twily wants it to be a surprise, so I'll be surprised. It's just like the other stuff we've been doing together as mommy and child." She thought to herself with a smile on her face.

Eventually, Twilight, Octavia, and Vinyl Scratch (and of course Smarty Pants even though she couldn't really play any instruments) believed they had practiced enough. They had no stage, but that didn't matter, much like the instruments they would create the stage with their imagination.

Twilight waddled over to Princess Celestia with an exceptionally bright smile, trying to hold back her excitement so as to not give away the surprise. "Hi, Mommy." She chipperly greeted.

"Hello, Twily," Celestia replied in that motherly tone of hers. "Are you enjoying your playdate with Octy and Vinyl?"

The padded alicorn princess nodded and then proudly said. "Yup. And we decided to do something extra special. We're gonna do a little concert for you."

"Oh? For me?" The sun princess commented as she again feigned ignorance. Sure, it might be fairly obvious given her lack of acting experience, but it was the thought that counted.

"Uh-huh!" Smarty Pants chimed in. "We're going to do a song called The Pony Pokey. And you can join in too if you want. You don't have to sing, just do what Twily and I do while we play our instruments."

Octavia then cleared her throat, cello at the ready. "And now, Princess Celestia, we are pleased to bring you..." She paused for dramatic effect, then declared. "The Pony Pokey!" And she, Vinyl, and Twilight (and Smarty Pants too) all started singing in unison. As they sang, they performed various gestures in time to the music, which went like this:

You reach your right hoof in,

You reach your right hoof out.

You reach your right hoof in,

And you shake it all about!

You do the Pony Pokey, meeting lots of folks with clout.

That's what I'm talking about.

You step your left hoof in,

You pull it right back out.

You step your left hoof in.

But you better help him out!

You do the Pony Pokey but should find a different route.

That's what it's all about.

You kick your back left in,

You pull your back left out.

You reach your back left in,

Just be brave and have no doubt!

You do the Pony Pokey, feeling like you're gonna pout.

That's what I'm singing about.

You tilt your head in,

You tilt your head out.

You tilt your head in.

Then you shake it all about!

You do the Pony Pokey even though your date's a lout,

You're better off without.

You stomp your whole self in,

You stomp your whole self out.

You stomp your whole self in,

And you stomp yourself about!

You do the Pony Pokey and you give a little shout,

That's what I'm talking about!

You do the Pony Pokey,

And that's what it's all about!

About midway through the song, Princess Celestia couldn't help but notice Twilight adopting a most unusual expression upon her face. She was about to ask what it was, before she saw her fellow alicorn spread her legs apart and lift her tail. Celestia's trained ears could hear the sound of muffled grunts even over the sound of the music.

In a matter of seconds, Twilight gave one big push and her diaper noticeably bulged in the back. A faint scent of methane began to waft through the air. Yet the alicorn went right back to singing and dancing as if nothing had happened, and nopony else seemed to notice yet what Twilight had just done.

When the song ended, Twilight still didn't seem to be aware of the fact that she had messed herself. She instead smiled as she looked upon Princess Celestia, seeing the sun princess clap her hooves in approval. "Oh bravo! Bravo!"

"Did you like it, Mommy?" The padded alicorn asked in a hopeful tone of voice.

Celestia happily nodded in confirmation. "I loved it, Twily! You and your playmates were wonderful!" She wiped a lone tear from her eyes. "You continue to make me so proud of you!"

The young alicorn princess beamed with pride. "Thank you, Mommy!"

Celestia then cleared her throat. "Well, now that your concert is over, Twily, there's something we need to discuss."

"What do you mean, Mommy? Is something wrong?" Twilight asked with concern, still apparently unaware of her dirty diaper or the stench coming from it.

The sun princess was perplexed by Twilight seemingly not knowing about having messed herself. "Does she really not know she made a poopy? Or is she just pretending like that other time?" She thought to herself, remembering her conversation with Luna a while back. But she quickly pushed those thoughts and concerns to the back of her mind as she did her best not to adopt a goofy grin, all the while she said to her former student. "Yes, something is most certainly wrong, Twily. You have a messy diaper. And it really stinks!"

"What?! Why didn't anypony tell me sooner?!" Twilight blinked in apparent disbelief as she looked to her diaper and saw a very obvious bulge spread across the back.

"I was actually just about to say something myself, but I was so caught up in my performance that I forgot," Octavia admitted in a somewhat shameful tone. "As for Vinyl. Well, I guess she's gotten used to such smells after all the late night gigs at clubs. I've never been to any myself, but they do have a certain reputation."

Vinyl just replied. "When you gotta go you gotta go."

Smarty Pants then teased. "Goodness, Twily! You sure are a stinky baby. You should hurry up and get changed before you make the whole castle smell bad!"

Celestia then levitated Twilight into the air and carried her away. "You're definitely in need of a change, Twily. And probably a bath too."

The rest of the day was a blur of fun for Twilight, who enjoyed her two musically talented playmates and playing with them just as much as she'd enjoyed all her prior playmates. The day of fun tuckered her out, and she slept soundly that night under Celestia's watchful eye.

Octavia and Vinyl Scratch both agreed to keep Twilight's secret to themselves, and they too slept soundly that night. They woke up the next morning in the private suite in the castle that had initially been reserved solely for Octavia as part of her "punishment", both feeling refreshed.

Vinyl was just packing up her tapes and getting ready to catch the train back to Ponyville, when she happened to notice something taped to the door of the suite. "What's this?" She wondered aloud as she took it off the door with her magic. It was a letter, and she read it aloud:

Dear Octavia Melody and Vinyl Scratch,

Thank you ever so much for agreeing to be Twily's playmates, and for agreeing not to tell others about her secret. It makes me happy to know that Twily can be herself around ponies like you without fear of being judged or made fun of.

I do hope you will consider coming back for another playdate some time, Twily really enjoyed spending time with you two. And the little concert you helped her stage for me was most appreciated. It was adorable.

As I promised before, you will be greatly rewarded for your services. I hope you'll both appreciate it. And Vinyl, don't worry about Octavia, I assure you that word of her private performance for my sister's birthday and what it means will not be leaked out.

Sincerely,

Princess Celestia

"What do you think she means, Octy? I mean, Tavi?" Vinyl Scratch blinked, quickly correcting herself as she resorted to the more appropriate nickname for her roommate when they were not padded up.

But Octavia didn't reply, she was too busy looking at something else. For she too had received a note, and was currently reading over it very carefully. At last, she turned to the off duty DJ and told her. "I just got word from my mother, Vinyl. You will never believe this: She's actually expecting another foal!"

"What?! No way!" Vinyl exclaimed in disbelief! "After all this time? How is that posi..." Then it dawned on her. "That must be the reward Princess Celestia had in mind." She thought to herself, and smiled. Hopefully, now Octavia's mother wouldn't be in such a rush to see Octavia married and settled down with foals. And that would mean that Vinyl could have Octavia all to herself.

Big Sis Velvet (Twilight Velvet)

Author's Note

To my knowledge, this is the first ever padded pony fic where Twilight Velvet is a foal and not a caretaker. To celebrate that, here is a picture of Velvet in diapers:

Anyway, I decided to go with the headcanon from Blown Together: a Night Light & Twilight Velvet Adventure in that Velvet is a former student of Princess Celestia. I also drew a little bit on inspiration from FabulousDivaRarity, who wrote a lot of headcanon stories involving Twilight Velvet and Shining Armor, particularly on the inspiration that Velvet breastfed her children even after they were old enough to no longer require it.

Since no one proposed any ideas for what Velvet could do with Twilight, I decided to draw on the popular headcanon of Velvet being a writer, as well as her canonical personality of being a thrill seeker. Two of the books read here are references to other padded pony works I've been part of, one now defunct.

Now, in light of the votes that have been received so far, here's what I'm going to do for the next chapter. First, I'm going to list all the characters ineligable for the fic under any circumstances, then list the ones that cannot be done solo anymore. After that, I'll list the characters who have received votes in rounds prior. Spitfire will get two half votes, equaling one full vote. But if she ties with any character not on the list, that character will have priority.

Characters ineligable under any circumstances:
Starlight Glimmer
Discord
Trixie
Sunburst
Cutie Mark Crusaders
Flurry Heart
School aged or younger children (i.e. Cake Twins)
Characters introduced after Flurry Heart (Starswirl the Bearded, the Pillars, Star Tracker, Mudbriar, etc.)

Characters that can only be done in group pairings:
Mane six
Spike
Princess Cadence
Shining Armor
Princess Luna
Octavia and Vinyl Scratch
Twilight Velvet

Characters previously voted on:
Spitfire - One vote
Lightning Dust - Half a vote
Moondancer - Half a vote
Cheerilee - Half a vote
Maud Pie - Half a vote

As always, feel free to not only suggest characters to be playmates for Twily, but also what they can do with her. But keep it SFW, nothing sexual.

Big Sis Velvet (Twilight Velvet)

Twilight's next playmate came as quite a shock to the padded alicorn in more ways than one. The first shock was when Princess Celestia took the liberty of waking her charge, and introducing the playmate directly. All the while, Celestia maintained that motherly smile of hers as she checked Twilight's diaper, finding it dry. "I hope you don't mind, Twily," Her smile grew brighter. "I have a feeling you'll recognize the pony I brought here to be your playmate today. She practically begged me to let her play with you after she found out that your big brother also got to play with you."

A gasp escaped Twilight's mouth! "You mean...?!"

Nodding, the sun princess stood aside, and from behind her trotted a very familiar unicorn mare with a snow white coat. Her mane and tail consisted of snow white locks and very light purple streaks in the same skunk stripes as the pink one in Twilight's mane. And of course, said mare was clad in an overly thick, poofy diaper that hugged her rear tightly. Waddling forward in a somewhat clumsy fashion, the mare cleared her throat and smiled. "Hello, Twily! Surprised to see me?!"

The padded alicorn's jaw dropped wide open in disbelief! "Mommy Twilight?!" She exclaimed in profound surprise! Was this all a dream despite how real it felt? Never in her wildest imagination had she given any thought to having either of her parents not only find out about her secret, but also partake in it with her.

Twilight Velvet happily nodded, then giggled. "Yes, it's me. Although, since Princess Celestia is already your mommy here, I'm really more of a big sister to you: Big Sis Velvet," A blush formed on her cheeks. "Gosh, it feels so... strange to see you back in diapers. I remember how, compared to Shining Armor, you took to potty training so well. You were out of diapers before I stopped breastfeeding you."

"H-how... how is this possible?!" Twilight stuttered in disbelief! She didn't know what else to say, or even what she could say.

Velvet smiled "It's really quite simple, Twily. You're okay with me calling you that, right? I know you used to find that name so embarrassing whenever Shining Armor or Cadence would use it," Then she coughed into a hoof, before flashing a knowing wink at Princess Celestia. "Anyway, Princess Celestia already kept me informed of your little secret from the moment she found out about it. She was so worried about being your mommy, she wanted to make sure I wouldn't be jealous. Fortunately, I was more than happy to let her baby you to her heart's content. I even let her borrow my lactating pills that I kept just in case of an emergency."

Princess Celestia then added. "Velvet and I were already pen pals. She was once my student the same way you were, Twily. You were a lot like her, actually, aside from the fact that you weren't quite as adventure loving as she was and still is. And it seems that thrill seeking nature led her to ask that I let her be your new playmate," Giggling and trying to suppress a smirk, she went on to say. "Even if it means she goes back to diapers. Luckily, your diapers fit her pretty well. With a little bit of magical adjusting to fit her size and weight, of course."

Velvet proceeded to poke at her padding with a hoof, delighting in the crinkles it gave off as it compressed. "I needed a break from my writing desk anyway. I've been struggling to think of how to end my latest novel. And this seemed like the perfect distraction," Then she asked. "Now, are you gonna introduce me to Smarty Pants? I know how attached you two are. And any friend of yours, Twily, is a friend of mine."

The young, padded alicorn nodded quite slowly, still trying to process the idea of her female parent playing the role of a big sister. It was a lot to take in on short notice. Nevertheless, she trotted over to her bed and grabbed Smarty Pants from her resting place next to the pillow at the head of the bed. "Hey, Smarty Pants," She said to the old doll. "You'll never guess who Mommy got as my next playmate. It's my other mommy, the one who was my mommy before Princess Celestia became my mommy."

"Hello, Mommy Twilight," Smarty Pants greeted in that exaggerated tone of voice that made it so easy to tell it was really Twilight speaking. "I didn't know a pony could have two mommies, or that mommies and daddies wore diapers. Twily's mommy never wears them, she uses the potty."

Velvet couldn't help but snicker. "Well, I'm not Mommy Twilight today. Twily already has a mommy, but she doesn't have a big sister. You can call me big sis Velvet, or big sissy. After all, I'm wearing diapers too." She promptly and proudly showed off her poofy, padded posture, patting it with a hoof.

Smarty Pants commented. "Hey, aren't those Twily's diapers? You should've asked, I'm sure Twily wouldn't mind sharing them."

Velvet blushed. "Sorry. I was just so excited about the chance to play with Twily that I guess I forgot about asking. But her mommy said it was okay."

Twilight then replied. "It's okay, Smarty Pants. My mommy buys me plenty of diapers. I don't mind sharing a few with big sissy. Diapers are better than the potty anyway."

"Oh yes, definitely." Smarty Pants agreed.

"Oh come now, Twily," Velvet encouraged. "I'm sure you'd get to like the potty if you just gave it a chance."

But the sun princess waved a hoof. "Oh, it's okay. I don't mind changing Twily, no matter how stinky she gets. If she doesn't want to potty train, she doesn't have to. Mommy wants what's best for her little filly."

"Exactly!" Twilight beamed, hugging her fellow alicorn. "You're the best mommy ever, Mommy!" Then, with a blush, she turned to Velvet and said to her "other mommy". "No offense."

The elder Twilight shrugged off the remark with indifference. "None taken."

Smarty Pants then asked. "So, what should we do first... Mo... er big sis?"

The elder alicorn with a majestic white coat quickly proposed. "Well, what about story time? We've never done that before, have we, Twily?"

Velvet pouted. "Aw, that's no fun. I wanna explore the castle! I might not get another chance like this for a really long time."

Twilight seemed to be intrigued by the idea proposed by the padded unicorn. "Yeah! We should explore the castle with Mommy! It'll be like an adventure!"

Princess Celestia rejected the idea. "Maybe later, my little ponies. I don't want either of you getting into trouble."

"We wouldn't cause trouble. We'd be good, wouldn't we, Twily?" The elder Twilight suggested.

Twilight firmly nodded. "Yeah. I'd even use the potty if you wanted me to, Mommy. If I did that, would you let us explore the castle with you?"

Celestia again shot down the idea. "I wouldn't want any of the castle staff to get the wrong idea about you, Twily. I would first have to make sure none of them promised to tell anypony about it, and that there are no visiting delegates or other important ponies who might see you. For right now, you and your big sis will stay here and listen to the stories I'm going to read you. If either of you wants to use the potty, you can. But only if I'm there to supervise you." And with that, she used her magic to pull out a small table and some chairs, along with a stack of books that looked surprisingly foalish in design and cover.

"Guess we'll just have to wait another time to go exploring. But that's okay, we can still have fun here." Smarty Pants commented.

"Yeah, I guess so. Reading can be a great way to escape from reality," Velvet declared. "I know how much you loved the stories I used to read to you, Twily. It's always a good idea to inspire a love of reading and learning at a young age," And she chuckled. "You were so smart you practically ran your potty train all on your own. I barely had to do anything," She paused and wiped a tear from her eyes. "Sorry, I'm getting sentimental. Guess seeing you in diapers really brings back memories."

Twilight simply nodded back in silent approval, then joined Velvet as the two padded ponies promptly planted their poofy, padded postures onto the seats. Smarty Pants was seated off to the younger Twilight's left, while Princess Celestia took up a seat at the opposite end of the table. Much to the surprise of both Twilights, they found small paper plates filled with food, and sippy cups filled with apple juice.

The sun princess flashed a motherly smile. "Before we start reading, how about my little ponies have a snack? Baby carrots and applesauce. And if you both behave, I'll let you have freshly baked cookies for dessert."

"Oh boy, cookies!" Twilight eagerly exclaimed as she licked her lips in anticipation!

Velvet, meanwhile, commented. "Baby carrots have always been Shining Armor's favorite. I should make them for him the next time he comes home for a visit."

The two Twilights greedily devoured their snacks, scarfing down the baby carrots and applesauce even as they got traces of said applesauce all over themselves.

Rather than frown upon the lack of table manners displayed by the little ones, the elder alicorn just smiled that motherly smile of hers before levitating over a wet rag. "Goodness, you two must've been hungry!"

Velvet nodded and grinned. "We sure were. I didn't even realize how hungry I was until I started eating the baby carrots."

"Well, I hope you two have room for dessert," Princess Celestia declared as she levitated over a much larger plate. "A deal's a deal, here are your cookies."

Smarty Pants let out a sigh of regret. "I wish I could enjoy food like baby carrots and cookies. But I can't. I'd just make a mess."

"Hey, don't feel bad," Twilight said to the old doll. "You can do all kinds of things that I can't. You could sit on a potty made of Legos without getting hurt. I could never do something like that."

Velvet chimed in with her own sentiments. "I remember how much Twily used to toss you around and bang you against things like you were a drum, Smarty Pants. But you never complained once, and you held up really well despite all the punishment you took. And I haven't forgotten how you used to sing to Twily whenever she was on the potty, helping her tinkle."

"Big sis!" The padded alicorn playfully whined.

The padded unicorn just chuckled. "I was just trying to cheer up Smarty Pants the way you were, Twily," Then she apologized. "I'm sorry if I embarrassed you in front of Mommy."

Celestia sweetly replied. "It's alright, I don't think any less of Twily for that. It just tells me that Smarty Pants was the first friend Twily ever had, long before she had the courage to make other friends. And it warms my heart to know that, even from a young age, she could appreciate the magic of friendship and experience its wonders first hoof."

"Enough chit chat!" Twilight eagerly declared as she reached out a hoof to the plate of cookies! "I want cookies!"

The sun princess, however, gently yet firmly swatted Twilight's hoof away. "Now now, Twily. You mustn't touch that plate. Those cookies are hot. You could burn your hoof and get an owie. We wouldn't want that, would we?"

The padded alicorn seemed to whimper in reply. "No we wouldn't. Owies are no fun."

"Exactly!" Princess Celestia declared as she lit up her horn. "I will put the cookies on plates for the both of you. But let them cool off for a minute or two first. You should never touch or put anything in your mouth that is hot. Not unless you want to see how ouchie burns can be."

So both Twilights reluctantly waited as the steaming hot cookies tempted them, the aroma wafting through the air and tickling their noses. At last, however, they were given the encouraging nod from the sun princess. And together, elder and younger Twilight devoured the cookies on their plates in record time. After which, the two padded ponies leaned back in their chairs, letting out hearty belches.

Celestia once more cleaned her charges' faces, then set the plates aside for washing later. Then, she rose from the table and motioned for the padded ponies to do the same. Soon afterward, the non-padded alicorn sat down and brought the stack of books over. "Alright," She cleared her throat. "Which book should we read first: The Legend of Gusty the Great?" She floated over a violet red colored book that depicted a greenish-gray unicorn mare. "Goldiehoof and The Three Ursas?" Next to be floated over was a bright red colored depicting an earth pony filly with curly gold locks, two ursa majors, and an ursa minor. "Daring Do and the Temple Toilet?" This book was the same green as the first Daring Do book, but depicted a filly Daring Do sitting on a giant toilet. "Captain Padding v.s. The Potty Monster?"

Velvet let out a gasp! "Hey, that's one of my books! I was inspired to write it during Shining Armor's potty training the first time he tried to go potty all by himself. I had to change names and change some of the details, but the inspiration just struck me."

"Wow!" Smarty Pants exclaimed with amazement! "Did you ever write any books about Twily when she was a foal?"

Velvet firmly nodded. "I most certainly did. One of them even helped me win the coveted Daring Do Award."

Princess Celestia chuckled. "Oh, I had no idea you wrote such books, Velvet. I guess it's settled, then," She floated over a dark blue book depicting a toddler unicorn colt that looked suspiciously similar to Shining Armor. "I'll read Captain Padding v.s. The Potty Monster first," Using her magic, she opened up the book and cleared her throat, beginning to speak in an exaggerated tone of voice. "This is a story about how Captain Padding battled and triumphed over his greatest nemesis: The Potty Monster, a monster that prayed on innocent colts and fillies trying to be big kids."

"And so, with the vicious Potty Monster vanquished forever, Captain Padding had made the bathroom safe for colts and fillies of all ages," Princess Celestia spoke as she finished reading the book. "And in the process, he himself had proven that he was more than worthy to wear his big pony pants. From that forward, he was Captain Padding no longer. He was now Captain Pull-ups. The end."

Both Twilights clapped their hooves, signaling their praise and approval of the story as they sat upon the floor.

Celestia then levitated over a book that she knew the younger Twilight had always regarded as one of her favorites: The Legend of Gusty the Great. Soon, she had opened it up to the first page and begun to read it. As she did so, she could see both Twilight and Velvet shifting about on their diapers from time to time, trying to get as comfortable as they could. It warmed her heart to see Twilight getting along and playing along so well with her first mommy. And Twilight Velvet seemed to be taking to the role of "big sister" very well, as if she'd done it all before.

Compared to Captain Padding v.s. The Potty Monster, The Legend of Gusty the Great was full of "big words" that the sun princess had to pause and explain to Twilight and Velvet what they meant. Yet she could still easily judge how much they loved the story from the way they were sitting and staring up at her, their eyes conveying that she had their full and undivided attention.

At last, Princess Celestia finished the story, reading aloud. "Thus did Gusty the Great pave the way for the land of Equestria to come into existence. With Grogar, the father of monsters defeated and sealed away within his bewitching bell, he would never again threaten or terrorize anyone ever again. And Gusty the Great and the ponies lived happily ever after."

"Wow! That was even better than Mo... er big sis' story!" Smarty Pants commented in amazement. "Gusty the Great sounds like a really brave pony, even braver than Shining Armor or Princess Celestia!"

"When I grow up, I wanna be just like Gusty the Great!" Twilight proclaimed in an exaggerated tone of voice as she puffed out her chest and stood up! "I'm not gonna be afraid of anyone or anything! I'll go on death-defying adventures with friends, right wrongs, and triumph over evil!" Yet she then lost her balance and fell backward, causing her padded rump to crinkle and squish underneath her.

Hearing that squish immediately prompted Celestia to get up from the chair she had been sitting in. She sniffed the air as she trotted over towards Twilight, eyeing her diaper with a trained eye. A closer inspection revealed that it was visibly soaked, and had been for some time. "Twily, why didn't you tell me you'd pee-peed yourself?" She scolded in that motherly tone of hers. "You could've gotten a rash."

Twilight's face flushed red with embarrassment. "Sorry, Mommy," She sincerely apologized as she felt herself be levitated into the air in front of Velvet and Smarty Pants. "I was just focusing on the story and all those voices you were using. I guess I didn't realize I went potty."

Princess Celestia just sweetly smiled as she levitated her fellow alicorn onto the changing table. "Well, I guess it's a good thing you gave yourself away with that squish. But next time, if you feel like you need a change, just say something. Story time or playtime can always be paused for diaper changes. We always want to change as soon as possible to avoid rashes." With trained precision, she swiftly undid Twilight's soggy old diaper and removed it, tossing it into the trash. Then she levitated over some wet wipes, sprinkled in some foal powder, and as a precaution worked in some rash cream. After that, she fastened a new diaper to Twilight's rump and then helped her charge down from the changing table.

"Thank you for changing me, Mommy," Twilight hugged the older alicorn anew. "Sorry I didn't tell you sooner, maybe we could've tried to get me on the potty."

"It's alright, Twily. I want you to do whatever makes you feel comfortable and cared for," The sun princess sweetly replied. "If you prefer your diapers to the potty, I won't force you to give them up," But as the two alicorns made their way back to Velvet's location, the smell Princess Celestia had smelled returned anew. "Hm, now that's odd. I thought the smell was coming from you, Twily. Did you toot?"

The padded alicorn shook her head from side to side. "No, Mommy, I didn't toot."

Celestia quickly realized that such a statement could mean only one thing. And sure enough, when she inspected Velvet's diaper, she could tell that the stench was emanating from there.

Smarty Pants giggled and teased. "Big sis made a poo-poo!"

"Smarty Pants, that's not nice!" Twilight scolded the doll. "You don't make fun of me when I go poopy! Mo... er big sis couldn't help it."

Velvet nodded, apparently not bothered by the strong smell wafting through the air. "Yeah. Besides, even big sisters have accidents from time to time," Then she looked up at Princess Celestia. "Sorry I didn't say anything sooner. I didn't want to be a burden."

The sun princess just replied by lifting her former student into the air not unlike the way she had carried Twilight earlier. "Well, you've most definitely earned a change, you stinky filly!" She playfully teased! "Goodness! You're just as stinky as Twily! It must run in the family or something!"

"I guess so." Velvet sheepishly admitted as she watched Twilight and Smarty Pants turn their heads so as to give her some much needed privacy. It was truly a surreal experience for her to have her dirty diaper be changed by the princess. But at least it did make her feel young again.

Luckily for everyone, Princess Celestia was just as swift at changing Velvet as she was at changing Twilight. In no time at all, she had gotten the unicorn changed into a fresh, clean diaper. The old, dirty diaper was tossed into the trash and then bagged up. And with the flick of a horn, it was teleported away, taking the foul smell with it.

Story time then resumed with no further interruptions, until both Twilights' eyes started to droop. Celestia knew what that meant. She paused in the middle of the book she was reading, inserting a paper stub to serve as a bookmark. Then she set the book down on a pile and got up again. "I think it's time for all good little ponies to take their naps." She motherly cooed to them.

"But... we're not tired." Twilight insisted, before betraying her argument with a yawn.

The elder alicorn simply trotted over, helping both padded ponies to stand. "Oh yes you are. This is not up for argument. Besides, I have some grown-up things I have to get done. So this works out for the both of us: You two will take a nap together, and I'll get all my grown-up things done. Then, when you both wake up, we'll have nothing to interrupt our play time together."

"Okay." Both Twilight and Velvet reluctantly yawned in agreement.

Celestia led both her charges back to Twilight's bed, carefully tucking Twilight and Velvet in together and placing Smarty Pants firmly within Twilight's hooves. Then, she lit up her horn and floated over two baby bottles filled with milk. "This should help you both to go to sleep faster."

Twilight eagerly grabbed a bottle when it was presented to her, wrapping her mouth firmly around its rubber nipple as she began to suckle on it. She was surprised by its rich, creamy taste. "Could it be?" She thought to herself, and slowly turned towards the sun princess. "Mommy?" She asked the non-padded alicorn.

"Yes, Twily?" Princess Celestia sweetly asked in reply.

"Is this... your milk?" The padded alicorn inquired.

Princess Celestia confirmed with a gentle nod. "It most certainly is. I had it prepared this morning. I won't always be there to give it to you directly. This way, you'll always have a part of me close to you no matter what," And she motherly encouraged. "Go on, drink it up. Your big sister has already finished her bottle." Sure enough, if one looked to Velvet, they would see the padded unicorn had drank every last drop of milk in the bottle given to her.

So Twilight turned her full attention back to the bottle given to her, and closed her eyes as she tried to imagine the sound of Celestia's gentle heartbeat. Slowly but surely, she suckled down the milk, yawning as she felt herself grow drowsy. A warm bottle of milk fresh from the sun princess, coupled with a full belly from snack time, was enough to make her nod off.

"Twily, wake up." The gentle, sweet, and playful tone of voice of Velvet called out sometime later.

The padded alicorn slowly opened her eyes, surprised to see Velvet staring right at her from the bed. There didn't seem to be a sign of Princess Celestia anywhere. "Where's Mommy?" She asked as she slowly sat up.

"I don't see her anywhere, Twily." Smarty Pants admitted as she looked around the room.

Velvet smiled. "Sorry for waking you up, Twily. But I just couldn't sleep for very long. I want to play and explore. And this is the best opportunity to do so!"

Twilight gulped and swallowed hard. "But won't we get in trouble if Mommy finds out?" She shuddered as she remembered what had happened the last time she'd disobeyed an order. The punishment was still fresh in her mind.

Velvet flashed a knowing wink. "We won't be gone for long. We'll be back before she ever finds out we're missing. It'll just be our little secret," She seemed to be all but bouncing up and down in excitement! "Come on! Don't you wanna have more fun with your big sister?! Don't you wanna see what kind of cool things we can discover together?! You said you wanted to be like Gusty the Great and have adventures."

Reluctantly, Twilight got up from the bed, tossing aside the sheets as she did so. "Smarty Pants, you stay here!" She told the old doll. "If Mommy comes back," She used her magic to hastily pull the covers back up. "Pretend that we're all still sleeping, and don't tell her where we are."

"Don't worry, Twily," Smarty Pants declared. "I'll cover for you and for big sis. You two have fun on your little adventure together. When you get back, be sure to tell me about it."

Velvet then eagerly grinned from ear to ear, all but racing to the door of the royal suite she and Twilight were in! "Come on, Twily!" She encouraged! "The sooner we leave, the better our chances of getting back before Mommy finds out."

After looking back to the bed to make sure Smarty Pants was well hidden and out of sight, the padded alicorn followed the padded unicorn to the door. Together, they opened it and stepped out into one of the castle's main long and winding hallways.

Where they would go, the padded duo didn't know. And that just made the adventure seem all the more exciting to the ponies.

Yet it wasn't long after wandering around that both Twilights became aware of the sound of hoofsteps in the distance! And it sounded like the hoofsteps were drawing closer!

Twilight let out an eep! "I can't let anypony else see me like this!" She frantically insisted as her eyes darted all about, looking for a place to hide until the danger had passed!

Velvet looked around. Suddenly, her eyes fell upon a lonely broom closet nearby. Grabbing Twilight by the hoof, she whispered in a hushed tone! "In here!"

The two padded ponies promptly ducked into the broom closet, shutting the door behind them as the sound of hoofsteps grew louder still! The broom closet was cramped, cold, and dark, not to mention dusty. Yet it was the only sanctuary both Twilights could think of at a moment's notice. They had to resist the urge to cough or sneeze despite the accumulated dust, fearful of giving away their position as the hoofsteps sounded as if they were passing by right outside the closet.

It was only a few seconds, but to Twilight and Velvet it felt like forever. Yet the sound of the hoofsteps gradually faded away into the distance. Emerging from the closet, both padded mares caught the faintest glimpse of the hoofsteps' source: Two royal guards conducting their patrols, appearing to be chattering to one another. But they were too far away to be heard.

Twilight breathed a sigh of relief. "That was too close!" She said to herself.

Velvet seemed to nod in agreement. "I almost pee-peed myself in fright, I was so scared," And then and there she decided. "You know what, maybe this wasn't such a good idea. We can have plenty of imaginary adventures right in the comfort of the suite. We don't have to go waddling around the castle, looking for trouble."

"Are you sure about that Mo... er big sis?" The padded alicorn asked.

Velvet nodded again, more slowly and reluctantly this time. "Yes, Twily. After all, I don't want you to get into any trouble with your mommy. As a big sister, I have to be responsible. That means putting your needs ahead of mine. Besides," She crossed her legs. "I have to go potty."

"Why not just go in your diaper like I did? You already did a poo-poo in it. Pee-peeing in it shouldn't be any harder." Twilight pointed out.

Velvet just turned and trotted back to the door leading to the royal suite. "Having an accident is one thing. Intentionally using your diaper is another. I'm a big sister, I have to try to make it to the potty whenever I can, even if I'd rather use my diaper." She had soon gotten the door open, and trotted back through it.

The padded alicorn watched as the elder Twilight, once safely back in the suite, made a beeline for the bathroom and shut the door behind her. Soon, there came the sound of rustling and crinkling, followed by the sound of hissing and tinkling echoing into a porcelain bowl.

"Ah, just made it." Velvet sighed in relief. Soon, she had finished peeing. She proceeded to wipe herself, then flush the toilet. But then, it was as if an idea came to her. She didn't get off of the toilet like Twilight had been expecting. Instead, there came the sound of a splash!

A horrified Twilight opened the bathroom door and rushed in! "Big sis!" She cried out as she looked around the bathroom in distress!

Fortunately, Velvet could be seen sitting inside of the toilet bowl. Her discarded diaper lay on the floor immediately in front of the toilet, still fresh, powdered, and pristine. "I'm okay, Twily. I just fell in, that's all." She delivered that line with a wink, suggesting that she hadn't "accidentally" slipped off the seat.

A gulp formed on the padded alicorn's face as she eyed the toilet. "But if you're inside the potty, doesn't that mean you'll go down the drain?"

The unicorn mare flashed a reassuring smile at the alicorn. "No I won't, I'm too big to fit down it. And so are you."

"How can you be so sure?" Twilight asked, still unconvinced.

"Well, why don't we find out together?" Velvet encouraged as she continued to sit in the toilet bowl, letting the water swirl underneath her flanks. "Come on. There's nothing to be scared of. The water's fine. And if we go down the drain, we go down together. Just imagine what an adventure that would be if that happened. But it won't, we'll be just fine. I promise."

Against her better judgment, Twilight approached the toilet. She undid her diaper and let it fall, then she hesitantly climbed over the seat and into the bowl. Between her and Velvet, there was no room at all for anything or anypony else. They just barely could squeeze into the bowl together.

"Ready?" The elder Twilight looked across to her now un-padded daughter, sounding more like somepony about to go on an exciting zip line or barrel drop as opposed to somepony potentially about to be flushed down the toilet.

Swallowing hard and summoning up courage, Twilight nodded back to Velvet. "R-ready as I'll ever be."

Velvet smiled, then surrounded the handle with her magic and forced it down! "Okay, here we go!" The flush cycle soon began, the waters in the toilet bowl underneath the two ponies surging and swirling around them. It felt like something was trying to pull on their tails and drag them down, but it wasn't strong enough to do so. Instead, the waters just swirled and spun around them, then retreated down the drain as the flush cycle ended. The water in the toilet slowly refilled, and the two ponies sitting inside the bowl hadn't moved. They had not gone down the drain.

The padded ponies climbed out of the toilet a moment later and shook themselves dry, before the elder Twilight declared. "See, Twily? I was right. We didn't go down the drain, and we never will. So now you know the potty's nothing to be scared of. You're big enough to have nothing to fear even if you should ever fall in," Then, she turned her attention over to the nearby bathtub, and used her magic to turn on the tap. "Now let's take a bath, just so we don't get sick from being in that toilet water. I'm sure it was clean, but this is just to be safe."

A nice warm bath, even if it was without bubbles, certainly helped Twilight to relax. She had most certainly enjoyed her play time with her "big sister". It reminded her a lot of the play time she and her brother had gotten into before life had inevitably taken them in separate directions.

When the bath had ended, Velvet stepped out of the tub first, stepping onto some pre-placed towels she had levitated over. As she watched her playmate climb out of the tub seconds later, she wrapped towels around the alicorn's body and helped her to dry off. "This has been so much fun, Twily," She said to the alicorn. "You've really helped me to feel young again."

Twilight smiled. "I'm glad I could help. You're an excellent big sister. My B.S.B.F.F.: Big sister best friend forever!"

"Oh, it warms my heart to hear you say that!" Velvet happily exclaimed as she hugged the still towel wrapped younger Twilight. Eyeing the toilet again, she then had an idea. "You know what, Twily? While we're here, why don't we try to get you on the potty? See if maybe you can do a poo-poo in it."

"Are you sure? I don't think I really have to go." Twilight hesitantly replied.

Velvet encouraged in an almost motherly tone of voice. "Come on, Twily. Don't you wanna try to be a big pony like me and like your mommy? If we can do it and Smarty Pants can do it, so can you!"

Sensing how much the elder Twilight really wanted her to at least make an honest attempt, the alicorn reluctantly approached the toilet as the towels were removed from her body. She was still hesitant to sit down on the seat, but managed to will herself to do so.

"Now just relax," Velvet told the younger Twilight. "You don't have to sit for very long. I just want you to try. If you don't do anything, that's okay."

Yet as the still unpadded alicorn sat on the toilet, she suddenly felt a faint urge building up inside of her. She could probably ignore it and wait for it to die down, even knowing that she would have to do it later. But instead, she grunted and started to push as her tail hiked upward. Her face turned red as she continued to push. Since it had been so long since she'd done this in a toilet and not a diaper, her body was fighting against her. Yet she was eventually rewarded for her efforts when she felt something move within her, heard an audible plop and then a splash.

The elder Twilight clapped her hooves in praise! "Way to go, Twily! I knew you could do it!"

The alicorn mare was sure she knew what she had done. Yet she still looked down anyway, and saw that indeed she had gone potty in a toilet. "I... I did it! I went poo-poo in the potty like a big filly!"

"Indeed you did, Twily," The familiar, motherly voice of Princess Celestia declared as the sun princess came trotting into the bathroom. "I'm so proud of you for once again facing your fear head on. And I hope that, now that you've done it once, you can try to do it again. At least once a week if possible, I would like you to try to go potty like a big filly. I don't mind changing you even if you don't, but diapers are expensive. Going potty like a big filly would help make your diapers last longer."

"I guess I can try, Mommy," Twilight agreed, before blushing and asking. "Um, is it okay if I ask you to help me wipe?"

"Certainly, Twily," The elder alicorn agreed, using her magic to do just that. And as she then flushed the toilet, she turned to Velvet and said to her. "Thank you for all your help today, Velvet. You've been an excellent playmate for little Twily."

"Think nothing of it, princess," Velvet waved a hoof. "It was my pleasure."

Twilight Velvet was more than a little bit disappointed when the next day rolled around and she had to go back to work. True, the time away from her writing desk had been memorable and enjoyable. She was now bursting with inspiration, and couldn't wait to put the ideas down on paper!

Yet as the unicorn mare entered her writing studio, ready to sit down and finally finish that novel she had been struggling for months to complete, she was surprised to see a vial containing a purple colored liquid substance. And attached to the vial was a note. Picking up the note with her magic, she examined it carefully. It read:

Dear Twilight Velvet,

Thanks again for agreeing to be diapered and playing the role of Twilight's big sister. I can tell she really enjoyed it, just as much as all the other playmates she's had since I started treating her as my baby. It warms my heart to know that I can confide this in you without fear that you'll be jealous.

Never being able to have foals of my own, it always feels great to be able to treat Twilight as if she were my daughter and treat her like a foal to our hearts' content. None of this would be possible without your support and advice. You are an excellent mother, and I know you'll make an excellent grandmare to Flurry Heart.

Here's a little something to reward you for your efforts. This should definitely help you feel young again, without you needing to go back to diapers.

Sincerely,

Your former teacher,

Princess Celestia

P.S. Thanks again for the lactating pills. They make it so much easier to breastfeed Twily. You're right, she is still very independent despite that. You raised your kids right.

So Twilight Velvet unscrewed the lid of the vial and brought its contents to her lips. Without hesitation, she chugged down the whole thing, drinking every last drop. When she had finished, she felt an odd tingling sensation. And then suddenly, there was a thick puff of smoke!

When the smoke cleared, Velvet saw what she looked like in a mirror. She could hardly believe her eyes! Staring back at her was a much younger version of herself! She had regressed back to the age she had been when, as a filly, she had become a student at Celestia's School for Gifted Unicorns.

The now filly aged Velvet chuckled. Boy would her husband be surprised when he came home and saw her like this.

Spity (Spitfire)

Author's Note

The only suggestion I got for this chapter was from Tiber Septim II, who suggested that Twilight should play train with Princess Celestia. Scootabom1 did propose the idea of Spitfire being recruited due to her having issues with children (which was established in Friends Forever #11).

In case you're wondering about Spitfire's comment about not being captain, in this fic's prequel the Rainbow Dash chapter ended with Rainbow being promoted to captain of the Wonderbolts. So I wanted to make sure that was acknowledged.

In keeping with the new rules I established in the previous chapter, any character previously voted for will receive only half a vote if they are mentioned again. But any character not previously mentioned will get a full vote. And I will also remind you of characters that are ineligable to be voted for.

Characters that can only be done in group pairings:
Mane six
Spike
Princess Cadence
Shining Armor
Princess Luna
Octavia and Vinyl Scratch
Twilight Velvet
Spitfire (with or without Wonderbolts)

Characters previously voted on:
Lightning Dust - One and a half votes
Moondancer - One vote
Cheerilee - One vote
Maud Pie - One vote

Spity (Spitfire)

"Come on, Twily," Princess Celestia encouraged in that cooing, motherly tone of hers as she plopped her fellow alicorn onto the toilet seat. "You did it for your brother and for your big sister. I know you can do it for me if you really try."

"But I don't want to, Mommy." Twilight pouted. It was hard to tell if she was being sincere or just acting up to play up her role.

Celestia simply smiled, pulling down Twilight's diaper. "You promised me you'd try at least once a week. If you really don't have to go potty, I won't force you to go. But you have to at least try," She then stood off to the side. "Don't worry, I'm right here in case you need anything. I won't let anything bad happen to you, I promise. Besides, you wouldn't want the first impression of your next playmate to be you in a dirty diaper, now do you?"

"But they'd be in diapers too," Twilight replied and giggled. "Even B.B.B.F.F. and big sissy wear diapers. Even Smarty Pants wore them once."

"Yeah, and they were super comfy. I wish I could be in diapers all the time just like you, Twily." Smarty Pants cheerfully chimed in.

The sun princess could only chuckle in response. "Maybe, but I still want you to try just the same, Twily. It doesn't have to be a poo-poo, it can just be a pee-pee."

Minutes seemed to pass by slowly as Twilight sat on the toilet, her diaper pulled down to her knees while Princess Celestia and Smarty Pants looked on with watchful eyes. But at last, the younger alicorn rose from the toilet. "I'm done, Mommy. I don't have to go."

Celestia decided it best not to press the issue any further. After all, part of her really didn't want Twilight to ever get out of diapers. "Okay, Twily. We can always try later if you think you want to. And remember, you're only allowed to use the potty with my supervision unless I say otherwise." She then pulled Twilight's diaper back off and led the padded alicorn out of the bathroom.

And just in time, too. Because at that moment, there came a knock at the door to the royal suite the two alicorns were in. The alicorn with a majestic white coat smiled, she knew who was on the other side. Lighting up her horn, she opened the door.

In strolled a pegasus mare clad in a navy blue flight suit. Yet it was possible to make out her gold coat and fiery orange mane and tail. A part of her still looked a bit unsure if the look in her eyes was anything to go by. "You sure this is gonna help me overcome my problems with kids, princess?" She spoke in her signature raspy tone of voice.

Immediately, Twilight's eyes went wide! She couldn't believe who it was! "Spitfire?!" She exclaimed, before hastily retreating behind Princess Celestia! "Y-you're not supposed to see this!"

But Spitfire only gave a light laugh. "Relax, princess, Princess Celestia already filled me in on the details. I promise, your secret's safe with me. After all, I know a thing or two about keeping embarrassing secrets." She seemed to blush a bit as she said that.

Nervously and reluctantly, the padded alicorn waddled out from behind Celestia. "You're here to play with me?" She asked, still hesitant and unsure.

Spitfire nodded quite slowly. "Yup. Figured I could use a break from the Wonderbolts. Rainbow Dash might be captain now, but I still stick around the academy in case she needs my help. And just because I'm not the captain anymore doesn't mean I'm not part of the team. I'll be a Wonderbolt 'til the day I die!" Upon seeing Twilight wince and recoil from her statement, she hastily corrected. "Sorry, sorry. Didn't mean to get so dramatic. Like I said, I'm not really good with kids. That's why Princess Celestia suggested I come here and play with you. She seems to think this'll help me get better."

"Indeed it will. The best way to learn how kids function is to get personal, hooves on experience," Princess Celestia encouraged. "Plus, you can still dip into your usual persona if you need to. Everypony loves a cool big sis."

Spitfire nodded again. "Yup. And from now on, you can just call me Spity. My mom used to call me that all the time when I was in diapers," Then she chuckled. "As a matter of fact, I kind of still am."

Twilight's mouth dropped open in shock! "What? You still wear diapers?!"

"Does that mean you're not potty trained?" Smarty Pants questioned.

The off-duty Wonderbolt giggled not unlike a school aged filly. "Never said that. I did graduate from diapers eventually. Had to to get into flight school," She began to move a hoof to the back of her flight suit. "But when you're up in the air or flying nonstop, sometimes you can't exactly fly off to look for a toilet. Luckily, I always come prepared." Soon, she had yanked off her flight suit, revealing a thick, white, poofy diaper was currently clad around her rump. In fact, it looked a fair bit used if the yellow tint and damp patches were any indication.

Now it was Twilight's turn to laugh. "Oh my goodness! You pee-peed yourself, Spity!"

If Spitfire was at all bothered by that obvious fact, she didn't show it outwardly. "Kind of had no choice. I didn't get a bathroom break before I flew over here. Had to come straight over from my last show, and that was a long one," She patted her diaper. "Luckily, I make sure to get the extra absorbent brands for the Wonderbolts. They're standard issue for long flights, performances, turbulence, and of course stunts. You never know what the g-forces might do to you. No need to pay for dry cleaning. You just let it all out and keep flying. Plenty of time to change afterward."

"Then I hope you won't protest if I change your diaper now, Spity," Celestia motherly cooed. "I can't have you playing with Twily in such a soggy thing. What if you got a rash? That wouldn't be any fun at all."

The padded pegasus nodded. "Yeah, guess it's time for a change. I'm pretty good at it myself, I'm the best diaper changer for all the Wonderbolts."

But the sun princess lifted Spitfire up with her magic. "Ah ah, Spity. Foals can't change themselves, you know. If you're going to play with Twily, you have to get into a foal's mindset the way Twily does."

Twilight nodded while giggling. "Yeah. You just relax and go with the flow. It's so much fun, especially when you have a loving mommy like I do."

Spitfire shrugged, surrendering herself to the inevitable. "Eh, guess I have no choice. Been a long time since I've had somepony change me. Eventually, you get used to doing it on your own. May not be the most fun or efficient thing ever, but it gets the job done."

It didn't take Princess Celestia long at all to remove Spitfire's old, soggy diaper and ball it up for disposal. It took only slightly longer for her to wipe and powder the pegasus, before strapping her up in a new diaper. "Since you're playing with Twily, you can borrow some of her diapers. There should be plenty for both of you." She motherly cooed, before levitating the padded pegasus pony off the changing table.

Spitfire took a moment to take in the scent of a freshly changed diaper and how it felt. "Gotta say, there's something so... relaxing about having your diaper changed for you."

"Uh-huh. And Mommy doesn't care if you're wet or messy!" Twilight proclaimed. "Mommy's there to clean you up and make you feel better, like all mommies do."

Celestia smiled and beamed with pride. "Oh, Twily, it warms my heart to know you think so highly of me. You're the best little foal I could've asked for."

Spitfire, meanwhile, plopped onto her padded rump. She delighted in the faint wisps of foal powder that billowed out from the leg holes, and the infantile scent of cornstarch that tickled her nostril as a result. For a moment, she was content to just sit there and be lost in her thoughts. But after the moment passed, she looked to her fellow padded pony and asked her. "So, what do you wanna do, pr... er, Twily?" She blinked slowly. "That's gonna take some getting used to."

Twilight giggled. "It's okay, Spity. I'm sure you'll get the hang of it eventually. Just do what I do," Then she put a hoof to her chin. "But actually, I don't really know what I wanna do today."

Princess Celestia then proposed. "Well, why don't I make a suggestion? After all, I got the day off so I could spend it with you, Twily. I don't want anything to get in the way of our playtime. And I most certainly couldn't take you to court with me. What would all the nobles think?"

Twilight stuck out her tongue in playful fashion. "They're just a bunch of big poopie heads. They don't like to have any fun at all! They're not like you, Mommy."

The sun princess seemed to struggle to suppress a smirk. "Even so, I don't think you'd want them all to know your secret, Twily. Better if we keep it to ourselves and to your playmates," She then suggested. "Now, why don't we all do something fun together? We can all play train: You, Spity, myself, and even Smarty Pants if she wants to join in."

The padded alicorn excitedly puffed out her wings! "Oh yes! Choo-choo train is fun! Let's play that!"

Spitfire pondered for a moment, then said. "Train sounds fine to me. I do like a little bit of pretend every now and then."

"How 'bout you, Smarty Pants?" Twilight asked the doll. "Do you wanna play too?"

Smarty Pants was quick to reply. "Oh, you know I do, Twily! I always want to play with you and have fun with you no matter what!"

"Splendid!" Princess Celestia clapped her hooves in approval. "Now let's all form a line and get our choo-choo train rolling," Then she suggested. "Spity, why don't you lead? You can be the engine that pulls the rest of the train behind it."

Spitfire was taken aback by the suggestion. "Me? Are you sure that's a good idea, Princess? I'm only just getting used to the idea of being a big foal."

Twilight happily encouraged. "I know you'll do a great job, Spity! Just close your eyes and pretend to be a choo-choo train. Mommy, Smarty Pants and I will follow you." She proceeded to stand directly behind Princess Celestia, and placed Smarty Pants atop her head so that the doll would be just slightly ahead of the padded alicorn.

The padded pegasus, however, just stood there in silence. She was hesitant to say or do anything. This was very much uncharted territory for her. What if she didn't do it right?

"Come on, Spity!" Twilight cheerfully called. "The train's ready to leave!" And she pretended to blow a whistle. "Choo choo!"

"Choo choo!" Celestia chimed in, mimicking Twilight's call.

Shutting her eyes and taking a deep breath, Spitfire tried to let go. She tried to picture herself not as a fearless Wonderbolt, but as a train on a railroad track, as the very locomotive at the front that pulled everything else behind it. In a way, it was not unlike her aerial performances with the Wonderbolts. The only difference is that this was for a private audience, which consisted entirely of the ponies behind her.

Steadying herself, the pegasus pony with a gold coat took a few steps forward. She was used to the extra weight of a diaper, though always when its crinkles were muffled beneath her flight suit. She quickly began shouting to drown out the infantile sound. "Choo choo!" She said in the most childish voice she could muster up (which didn't sound very convincing in her mind).

"Choo choo!" Celestia replied as she followed behind Spitfire as the ponies began parading around the room.

"Choo choo!" Smarty Pants and Twilight joined in, repeating the phrase every minute or so.

Of course, just saying "Choo choo" over and over again got tiring very quickly to Spitfire. So she tried to mix it up a bit by saying. "Chugga chugga."

Pretty soon, an alternating chorus of "Chugga chugga" and "Choo choo" could be heard echoing throughout the royal suite as Spitfire continued to lead the make believe train. Slowly but surely, as time passed, she found herself slipping more easily into her role. It felt so... liberating to be freed from all of her big pony worries, to just push them all aside and let herself go. She didn't even need to worry about needing the bathroom: She had a perfectly portable potty on her plot that could easily hold anything she might have to do if the need arose.

"This must be what ponies like Princess Twilight long to feel like," The padded pegasus thought to herself even as she continued her session of make believe with the princesses. "Could there be others like her out there somewhere?" Then she gasped as a realization struck her! "Of course! This must be why Princess Celestia had me hoof the reins of captain over to Rainbow Dash. Rainbow Dash must've found out about this too," A faint smirk formed on her face. "Oh, I am so gonna enjoy teasing her about this the next time I see her!"

Eventually, amidst the alternating chants of "Chugga chugga" and "Choo choo", the faintest of rumblings could be heard. It was coming from Spitfire's stomach, which caused the padded pegasus pony to slow right down to a standstill.

"What's the matter, Spity?" Twilight asked as she poked her head out from behind Princess Celestia. "Are you feeling okay?"

Spitfire slowly replied. "Uh, now that I think about it, it's been quite a long time since I had anything to eat. I usually don't like to eat big meals before a show. It's kind of related to how I got my embarrassing nickname, and why I started making all the Wonderbolts wear diapers for long shows," Her face blushed bright red. "Could've been worse, could've had it happen while my mom was in the crowd. Oh, I don't know if I'd ever live it down if she had seen that."

Smarty Pants chuckled. "Oh goodness, that must've been quite a mess: Just like the time Twily got into some chocolate pudding."

"Smarty Pants!" Twilight playfully whined. "You don't have to always tell everypony embarrassing stories about me! How would you like it if I told everypony embarrassing stories about you?"

"Gee, I'm sorry, Twily," Smarty Pants sincerely apologized. "I just get carried away sometimes. You're still my best friend, you know."

"Yes, I know," Twilight nodded, right before her own stomach started to grumble. "But now I'm hungry too."

"Well then, I guess that means it's time for lunch, my little ponies," Celestia cooed. "Delicious num-nums will get you fueled up for more playtime together," Then she trotted towards Spitfire. "But first, I believe diaper checks are in order."

Spitfire eeped as her padding was pulled back by the sun princess. "Why are you doing this? I'm pretty sure I'd know if I did anything in my diaper."

"Foals don't always know when they have to go or if they've done anything," The sun princess explained with a wink. "But you're dry, Spity. So just give me a moment to check on Twily, and then we'll get you both fed, okay?"

"Okay." Spitfire slowly nodded and sat down, waiting patiently.

Twilight proudly presented her padded posture to the elder alicorn as she approached, and didn't flinch when it was pulled back for a closer inspection.

"Seems you're a little bit wet, Twily," Princess Celestia commented. "We should get you changed. Unless, you'd like to try to use the potty again."

The padded alicorn shook her head from side to side. "Nah. I'm good, Mommy."

"Okay then," The sun princess agreed while using her magic to lift Twilight into the air. "Let's get you changed before you get a rash." And quick as a flash, she levitated her fellow alicorn over to the changing table and performed a diaper change.

Once Twilight was in a fresh, powdered diaper, she and Spitfire waddled after Princess Celestia as she ushered them to either side of her.

"Stay close to me, my little ponies," Celestia instructed, before lighting up her horn. She proceeded to teleport herself and the two padded ponies in her care to the royal dining room, which was currently unoccupied. "Okay. Everypony get comfortable, and I'll see what delicious num-nums are on the menu for today." She levitated over two bibs, tying them around the necks of both Twilight and Spitfire, then disappeared into the kitchen at the other end of the room.

Spitfire sat across from Twilight at the dining room table, which gave her an uninterrupted view of the padded princess poking at her padding with a hoof. Twilight clearly delighted in such a foalish act. Meanwhile, Spitfire was adjusting to the fact that her rear seemed to be sinking further into the padding. Her own diapers had always been thick and absorbent, but Twilight's diapers seemed to be even thicker (and probably even more absorbent). "Where does Princess Celestia... I mean your mommy get your diapers from, Twily?" Spitfire saw fit to ask at last.

The padded alicorn chuckled, not even looking up from where her hooves were. "I don't know. She must get them from somewhere special, though." And she went back to poking at her padding, making it crinkle and compress.

The off-duty Wonderbolt couldn't help but wonder what was so enjoyable about that. It didn't seem like it was anything worth taking pleasure in. Fortunately, her thoughts were soon distracted when Princess Celestia returned. Held within the glow of the sun princess' horn were several jars of different flavored foal foods, and plastic spoons. "Lunch is served, my little ponies!" She declared with a coo.

Spitfire watched with hesitation as the lids of the jars were unscrewed and removed, and the plastic spoons were dipped into the various colored goops. They didn't look appetizing at all. She usually wasn't picky about what she ate, so long as she wasn't eating right before or just after a show or a long flight (her stomach needed time to adjust). But this looked like it would be the rare exception.

Twilight seemed to harbor no such beliefs about the foal food. When spoons with the various foal foods were presented to her, she happily opened her mouth and let her fellow alicorn deposit the spoon's contents onto her mouth. Then, much to the padded pegasus' surprise, she watched as Twilight latched onto one of Celestia's exposed teats and began to suckle on it.

Princess Celestia's response was even more shocking than the act of Twilight nursing from her teats. She just drapped a wing over herself so as to give Twilight some privacy, until finally the padded alicorn decided she'd had enough breast milk and let go of the teat. Then she allowed herself to be burped by the sun princess, letting out a belch that would've made a dragon blush.

Spitfire knew what was coming next, and she squirmed about in her seat as she tried to get away. "Can't I have something else, please?" She pleaded with the taller, older alicorn.

Celestia simply replied in a motherly tone of voice. "Now Spity, you have to eat your num-nums if you want to grow up big and strong. This is all you're getting today, and I expect you to eat every last drop."

"But... but..." Spitfire stuttered.

"-Ah ah, no buts." Celestia motherly scolded, then presented one of the plastic spoons to Spitfire.

Hesitantly, the off-duty Wonderbolt opened her mouth and shut her eyes. She expected to gag on the foul taste, but was surprised instead by how sweet and delicious the deposited foal food tasted. It easily put Rainbow Dash's academy cooking to shame (not that that was saying much given how poorly Rainbow's first attempt had gone).

Princess Celestia smiled. "See? There's no need to make a fuss, Spity. It's good for you."

The padded pegasus didn't protest any further as the rest of the foal food was fed to her. The only thing that would make it better was if she had something to wash it down with. Imagine her surprise when she saw Celestia standing before her with an exposed teat.

"Go on, drink up." The sun princess encouraged.

"You sure you want me to, princess?" Spitfire asked as her face flushed red.

Celestia nodded. "Just don't drink too fast. You needn't worry, I have lactating pills so I can always have milk for when it's needed."

So Spitfire latched onto the teat and slowly suckled. She was almost overwhelmed by the warm, rich, creamy taste that soon reached her tongue! She only vaguely recalled the times her own mother had breastfeed her as a foal. Oh how long ago those memories appeared to be now. How long had it been? Two decades? Maybe three? At the time, Spitfire felt she had grown up at a fairly reasonable age. But now she was beginning to think that maybe she hadn't fully enjoyed her foalhood as much as she should've. To say nothing of how little time she'd spent with her mother as of late.

A faint yet steady hissing sound snapped the padded pegasus out of her pondering. She looked down at her diaper to see it fast swelling up as her bladder emptied itself. That breast milk had gone right through her!

"Oh, goodness!" Princess Celestia chuckled. "Twily does that too, sometimes."

"I do not!" Twilight playfully whined anew.

Spitfire, meanwhile, just sheepishly replied. "Sorry, princess. I didn't mean to do that."

The sun princess waved a hoof. "Oh, it's quite alright. That's why you're wearing a diaper," She then offered. "Would you like a change before we resume your playtime with Twily?"

The off-duty Wonderbolt looked down at her diaper, seeing the wet spots slowly fading as the padding soaked up her accident like a sponge. The damp feeling also wasn't that bad, at least for right now. So she said with a tone of indifference. "Nah, I'm good. These diapers look like they can hold a lot more than that!"

"Oh they most certainly can. I'm so jealous of the fact that you and Twily get to wear those diapers and I don't." Smarty Pants commented.

"Hey, if you like 'em so much, why don't you put one on, Smarty Pants?" Spitfire proposed. "I'm sure they could fit you with a little bit of adjusting."

Princess Celestia smiled. "I think that's a great idea, Spity. When we get back to Twily's room, I'll see about modifying one of Twily's diapers and putting it on Smarty Pants. Then you can all play together."

Sure enough, when Celestia brought Twilight, Spitfire and Smarty Pants back to the royal suite, she immediately used her magic to grab one of the thick diapers from Twilight's stash. Focusing her horn on the padded undergarment, she soon had it shrunk down until it was small enough for Twilight to slip it onto Smarty Pants.

Smarty Pants cheered! "Yay! I actually get to wear diapers instead of having them made for me! Thank you, Spity!"

Twilight beamed with delight. "Yes, thanks a bunch, Spity. You're the best, really!"

Spitfire waved a hoof, shrugging off the compliment. "Eh, it's no biggie. I just figured Mommy could do something nice for you too."

"Still, I can't thank you enough for your idea!" Smarty Pants happily proclaimed as she hugged Spitfire. "I think you're the best playmate for Twily in a long time. And I'm not just saying that because you helped get me into diapers."

"Well, don't thank me yet," The off-duty Wonderbolt replied. "Because now I wanna play something much more fun than choo-choo train, and that was a lot of fun."

"Really? What is it?" Smarty Pants asked the padded pegasus.

With a grin, Spitfire playfully lunged at Twilight and proclaimed. "Diaper wrestling, of course! First pony to pin the other underneath their padded rump wins. Trust me, this is the best!"

"You're on, Spity!" Twilight playfully replied as she began to tussle with her fellow padded pony. "I'm not gonna lose to you!"

The padded pegasus giggled as she rolled around, trying to avoid Twilight's efforts to roll her over and sit on top of her. "You can't beat me at diaper wrestling! You can't beat me at anything, period! I never lose! Now come on! Show me whatcha got!"

The two padded ponies thus tumbled and rolled about, paying little attention to anything else as they both tried to overtake the other and plop their padded plot firmly onto their opponent.

Princess Celestia initially watched the play fight with a motherly smile. But when she saw the two padded ponies drawing near to the princess sized bed, she immediately began to worry and gasped! "Look out!" She rushed forward, hoping to stop the fight before it was too late.

Alas, Spitfire made one swift motion and thrust herself hard at the padded princess. "I've got you now!" She boasted.

The resulting motion from the padded pegasus propelled Twilight backward. With an audible thump, her backside struck the foot of the bed. Immediately, the fighting stopped as Twilight sat up and began to whimper.

The off-duty Wonderbolt was immediately racked with guilt over what her actions had just caused. "Oh geez! I'm so sorry, Twily! Are you okay?! Are you bleeding? Did you break something?" And she began frantically trying to look the alicorn all over for any sign of injury.

However, Celestia ended up taking charge of the situation, lifting Twilight up with her magic and pulling her close for inspection. "It's okay, Twily," She reassured her fellow alicorn with that motherly tone of hers. "Mommy's here."

"Mommy, I got a boo-boo!" Twilight sniffled and sobbed. Sure enough, it was possible to notice a faint bruise mark on her back where it had impacted the bed.

The sun princess gently shushed Twilight, gently calming her down. "There there, Twily. I'll put a bandage on it. Then you'll feel better."

"I'll go get it!" Spitfire insisted, desperate to do something to make up for unintentionally causing her playmate to be injured.

But Princess Celestia took care of the problem before Spitfire could do much of anything. A smiley faced bandage a bright pink in color was soon levitated over the bruise, covering it completely. Then, carefully, Celestia set Twilight back down.

"I'm really sorry about that, Mommy," The off-duty Wonderbolt sincerely apologized, before turning her attention to Twily. "I didn't mean to play so rough with you, Twily. I forgot that whenever I did stuff like that as a foal, it was always outside. My mom would make me do it there so I wouldn't break anything or get hurt. And if I ever did get hurt, she would always be there to kiss my boo-boos and make me feel better."

"Sounds like your mommy was just as sweet as Twily's mommy is." Smarty Pants commented.

Spitfire nodded quite slowly. "Yeah, she was," A lone tear came into her eyes. "I really haven't seen her in so long. Things have been so busy with the Wonderbolts these past few years. It feels like I barely ever have time for myself anymore. This was my first day off in I don't even know how long."

Twilight slowly waddled over, nuzzling her fellow padded pony in the side. "Well, I'm sure you can find time to see your mommy now that you're no longer captain," Then she declared. "But maybe I should pick the next game we play. A game where nopony has to get hurt."

The rest of the day was a fun filled blur for Spitfire, as she passed the time playing all sorts of fun games with Twilight (including a game of house in which Spitfire was the unlucky pony to be saddled with the role of "Baby", resulting in far too many diaper changes that she was on the receiving end of). She wasn't sure this had fully cured her trouble with children, but the off-duty Wonderbolt was nevertheless convinced it was a step in the right direction at the very least.

When at last the playtime came to an end, Spitfire grabbed her flight suit and hastily put it back on. As she did so, she thought something was off from the way it felt. She quickly dismissed it, she could worry about that at a later time.

So exhausted was the pegasus pony that she only barely made it back to her own royal suite that she was staying in, falling asleep almost as soon as she had crawled into bed.

Next morning, when the off-duty Wonderbolt woke up, the first thing she noticed was a letter sitting on a stand near her bed. She sat up to get a closer look and read it, and as she did so she thought she felt something squish underneath her. But she could worry about that later, the letter seemed important. It was short and read as follows:

Dear Spitfire,

I don't want you to think you're in any trouble for what happened with Twily yesterday. She's fine, and I know you didn't mean to cause her to get hurt. Hopefully, the incident has taught you to be more delicate with foals, either others or your own if you ever have any.

That aside, you were a great playmate for Twily. I know she appreciated having somepony exactly on her level that could play with her. And Smarty Pants told me to tell you thanks for your idea about putting her in diapers, she really enjoyed it and is already looking forward to doing it again.

For somepony who told me she wasn't all that good with kids, you seemed to do a good job interacting with Twily. As a way of thanking you for what you did, I arranged a little something that I'm sure you'll appreciate.

Yours truly,

Princess Celestia

Spitfire had no sooner finished reading the letter when the door to her suite swung open. In strolled her mother, Stormy Flare. And was it Spitfire's imagination, or did her mother's eyes seem to be drawn to something?

Stormy Flare seemed to have a motherly smile on her face as she approached the bed her daughter was in, pulling back the sheets to be greeted with the sight of a very wet diaper. "My goodness, Spitfire!" She seemed to tease. "I thought you were potty trained."

At that the off-duty Wonderbolt gasped! Only now did it dawn on her that she hadn't changed out of her diaper last night, let alone used the bathroom. "M-mother," She whimpered in shame. "I...it's... not what you think. I just..."

Stormy Flare only made a tsking motion with one of her hooves. "It's a good thing Princess Celestia brought me here today. She said she had just the thing to make me feel young again. And this certainly makes me feel young. Why, I haven't changed your diaper since you were four."

"Mom!" Spitfire whined as the shame washed over her.

Dusty (Lightning Dust)

Author's Note

Scootabom1 proposed the idea of Lightning Dust mentally regressing after accidentally breaking into the castle due to messing up a stunt. And Tiber Septim II proposed the idea of Twilight suffering a nightmare, alerting Celestia as a result. I did also throw in a slight reference to Lightning Dust's prompt in "Potty Training Tales".

If you're curious as to what that punishment for Lightning Dust is, check out Tale #2 in this fanfic.

Remember, characters previously voted on will get half a vote, and any characters not mentioned before will get a full vote. As always, feel free to suggest not only who you'd want to see as a playmate, but also what Twily could do with them.

Characters previously voted on:
Moondancer - One vote
Cheerilee - One vote
Maud Pie - One vote

Dusty (Lightning Dust)

"Do you really have to go away, Mommy?" Twilight asked as she looked up at Princess Celestia whilst the elder alicorn was tucking the younger one into bed, the crinkling of Twilight's diaper mixing with the light rustling of the sheets.

Celestia nodded, but gently and motherly reassured Twilight. "It'll only be for an hour or two at most, I promise. As much as I love spending time with you and taking care of you, I still have my responsibilities and royal duties. If I put them off for too long, ponies would start to become suspicious."

"Can't I go with you, Mommy?" Twilight asked as she shot a pair of pleading, puppy dog eyes at Celestia. "I'll behave, I promise."

The sun princess smiled even as she shook her head from side to side. "And let all those nobles and delegates see you in diapers? I think not. The bond we have with each other is special. But something tells me that some ponies might not see it that way. Besides," She added with a smirk. "You're not potty trained yet, and I don't think you will be any time soon."

The young, padded alicorn blushed as she realized the obvious. "Oh yeah."

Smarty Pants just giggled. "It's okay, Twily. Whether you stay in diapers or not, you'll always have me. Nopony can ever separate us again."

Twilight clutched the stuffed donkey tightly for comfort. "You're right, Smarty Pants. As long as we're together, we can do anything!"

Princess Celestia let out a faint aw in spite of herself. She truly found it adorable when Twilight was in her little mindset. If only she could find a way to convincingly transfer her duties to someone else, then she'd have all the time in the world to take care of little Twily. Alas, royal duties were royal duties, and they couldn't be put off any longer. "Don't worry, Twily," She reassured her fellow alicorn. "I've set up a baby monitor so that if you need anything, I'll know. I've enchanted it so that only I will hear your voice, everypony else will just think it's a random foal. Now be a good little pony and take a nap for me, okay?"

"Okay, Mommy." Twilight yawned and slowly but surely shut her eyes, still holding onto Smarty Pants in the process.

The sun princess waited until she was certain Twilight was fast asleep, then slowly and quietly left the suite Twilight was staying in and headed for the throne room. With any luck, time would fly by quickly and she would be able to return to caring for Twilight before the younger alicorn awakened.

Celestia did her best to keep her mind from wandering while she was holding court. But even as she tried her best to pay attention, her thoughts kept drifting back to little Twily. She still remembered Luna's warning about not getting too attached, how it might adversely impact Twilight's mental state if former teacher and student couldn't separate from their roles. Despite this, the sun princess found that she had gotten quite used to being a mother to her new little one. What was so wrong with that when Twilight clearly wanted to be treated like a foal, and enjoyed being cared for?

Princess Celestia was only snapped out of her pondering and contemplation by a very familiar sound. Amidst a sudden silence in the throne room, it was possible to hear the sound of crying on an old, worn out baby monitor. And she knew at once who the crying was coming from! "Twily!" She whispered and stood up, all eyes suddenly falling upon her.

"Is something the matter, princess?" A delegate asked.

The sun princess nodded. "Yes there is," She was quick to apologize. "There's a foal in the castle who I'm trying to find the parents of. But until I do, I'm caring for it myself. And it sounds like the little one needs me now. I have to make sure it's okay."

The delegates, suspecting nothing, all nodded and gave their approval. The delegate from before even said. "Perfectly understandable, princess. We will wait until you've calmed the little one down."

"Thank you, everypony." Celestia bowed, then lit up her horn and teleported away. She soon arrived back in the royal suite where Twilight was staying, and found the padded alicorn tossing and turning in bed.

"Mommy! Mommy!" Twilight whimpered with her eyes shut, her sobs reaching audible levels.

Princess Celestia immediately rushed to the bedside, placing a hoof on the padded alicorn. "Twily?! Twily! It's okay, Mommy's here for you," She spoke in that warm and gentle tone of hers. "You're just having a nightmare. It's not real."

Slowly but surely, Twilight seemed to calm down as she opened her eyes. But then she immediately buried her face in Princess Celestia's chest, and sobbed and sniffled. "Mommy, it was horrible! We were going to see my friends in Ponyville for a playdate. And then, we got separated, and I couldn't find you anywhere, and... and..." She trailed off, unable to bring herself to say anything more.

The sun princess merely draped a wing over her fellow alicorn, pulling her close for a big hug. "It's okay, Twily. It's okay. I'm right here. I won't leave you ever, I promise." She stood there at the side of the bed, waiting for Twilight's cries and sobs to slowly cease.

When the crying finally stopped, Twilight slowly lifted her head. Her eyes were stained red from the crying. "Mommy." She said slowly.

"Yes, Twily?" Princess Celestia asked.

Twilight slowly looked down at her diaper, whimpering slightly. "I think I had an accident. I didn't mean to."

Although inclined to take Twilight at her word, Celestia nevertheless opted to do a quick diaper check just to be sure. The diaper had indeed been used, though it was hard to tell just by looking at it. Touching it, however, gave off a slightly damp feeling. Celestia cooed. "Oh, you're just a little wet, Twily. That's all. I think we can wait a little while before changing you. Your diapers can hold a lot more, you know. I don't think you'll get a rash just yet."

"Are you sure, Mommy?" The padded alicorn asked.

Princess Celestia firmly nodded. "Of course I'm sure, Twily. Now, why don't we play a little bit together, and then I'll change your diaper before setting you down for another nap."

Just then, however, the two alicorns heard a thundering crash and a loud boom that shook the ground!

"What was that?!" Twilight gasped and shivered in fright.

Celestia stood up, immediately throwing her wings over Twilight as she declared. "I don't know, Twily. But I'm going to find out," She proceeded to instruct the padded alicorn. "Stay here. I'll be back as soon as I can."

"Please be careful, Mommy." The padded alicorn pleaded with the sun princess as she watched Celestia depart.

After leaving the royal suite, Princess Celestia quickly rushed to where she was certain the disturbance had originated from. She didn't know who or what it might be, but with her horn charged she was ready to confront any potential threat. No one and nothing was going to get between her and Twily!

Rounding a corner, the sun princess suddenly came upon a scene that made her gasp!

Shards of broken glass lay by a stained window that had clearly been broken and shattered, displaying a silhouette of a full grown pegasus pony (thus leaving no doubt as to what had broken the window in the first place). The royal guards, meanwhile, were struggling to hold onto a pony that was fighting back against them!

Celestia approached the scuffle just as a guard finally succeeded in pinning down the assailant. "What is going on here?!" The sun princess sternly demanded as her eyes narrowed.

The guards stood up, firing off a quick salute before one stated. "Your majesty, we have just apprehended this would-be attacker that broke into the palace. From the looks of it, she was attempting a stunt of some kind that clearly backfired. She tried to run away from us, and then she tried to fight us. What shall we do with her?"

"Let me go!" A high pitched but raspy voice cried out! "You big meanies! No play nice!" The voice's owner then revealed itself in the form of a pegasus mare who looked almost completely identical to Rainbow Dash giving the mane style. Unlike Rainbow Dash, though, this pegasus mare had a turquoise green coat, a brilliant amber mane and tail with gold stripes throughout, and eyes the same color of orange as the sky at sunset. Her cutie mark was a white lightning bolt with three stars (two orange and one yellow).

Princess Celestia recognized the pegasus pony at once. "So you're Lightning Dust!" She exclaimed. "I heard about you from Rainbow Dash and Spitfire. Apparently, you are quite a troublemaker. And quite reckless too."

Lightning Dust stuck out her tongue, blowing a raspberry at the princess. "Me no like you! You big meanie too!" She declared, not appearing to recognize who she was talking to.

A royal guard quickly explained. "It seems like she hit her head at some point. We're not sure if this'll wear off eventually or not," Then he blushed. "And... there is another problem." He pointed a hoof to a small, yellow colored puddle that was just now forming underneath the pegasus mare.

"Oopsie!" Lightning declared as she crossed her legs. "Me go potty."

Celestia had to resist the urge to snicker at Lightning Dust's juvenile and foalish behavior. Right now, the pegasus pony was acting a lot like Twilight. Except this was no act, it seemed that the blow to the head had somehow caused Lightning to revert back to the mentality of a little foal. And that gave her an idea. "Guards." She sharply declared.

The royal guards stood at attention. "Yes, your majesty?" They all asked in unison.

"Please inform the delegates that I will not be returning to court today. If they ask, inform them that I'm taking care of a troublemaker who broke into our castle by accident, and that I'm not to be disturbed while I carry out the punishment," The sun princess instructed to the guards. Then, in a slightly embarrassed tone she added. "And uh, get somepony to clean up Lightning Dust's... accident."

"Understood, your majesty." The guards all saluted, and then raced away to carry out her orders.

That left Princess Celestia alone with the mentally regressed Lightning Dust. That motherly smile of hers returned as she declared to her would-be attacker. "I think we need to get you some 'protection' in case you have any more accidents. And luckily for you, I know where we can find the sort of 'protection' you need." She then used her magic to pick up the pegasus pony and carry her away.

Twilight was most surprised when Princess Celestia returned to the royal suite with Lightning Dust in tow, the pegasus pony drooling and sucking on one of her hooves. "Mommy, who is that?" She asked the sun princess.

Princess Celestia carefully floated Lightning Dust through the air, all the while using her magic to pull out one of the diapers normally intended for Twilight. "This is your next playmate, Twily. Lightning Dust, or Dusty as I'm going to be calling her. Let's just say she's been a very naughty pony, and this is going to be her punishment."

"Are you going to spank her?" Twilight asked, shuddering at the memory of the one time Celestia had done that to her as a result of bad behavior.

"Not unless she gives me a very good reason to," The sun princess explained as she slipped the diaper onto Lightning's rump and taped it up. "For right now, I'm hoping that she won't be too naughty. Maybe you can help her in that regard."

Twilight's wings unfolded as she happily exclaimed! "Oh boy, I get to be the big sissy! Isn't that great, Smarty Pants?"

Smarty Pants happily replied. "I'm so proud of you, Twily. You're growing up so fast."

Celestia smiled as she floated the now padded pegasus pony down. "Well then, I'll let you and Dusty get to know each other. Then I'll change your diaper, Twily, so you don't get a rash."

The padded alicorn watched as Lightning Dust took a moment to get used to her new padding. Lightning Dust clumsily waddled along, only for one of her hooves to give away and cause her to fall. Lightning landed promptly on her padded posture, producing an audible crinkle and a thud. "Me go boom boom!" Lightning declared, not sounding the least bit embarrassed about what she'd just done.

Twilight giggled, proceeding to intentionally do what Lightning Dust had just done by accident. "Me go boom boom too, Dusty!" She then stuck out a hoof. "I Twily, by the way. Nice to meet ya."

"Nice to meet ya, Twily," Lightning replied as she freed one of her hooves from her mouth and offered it to Twilight, shaking it firmly. "I Lightning, but me get called Dusty by everypony. So now me am Dusty," Looking at the alicorn, she exclaimed. "Ya so big!"

The padded alicorn proudly proclaimed. "That 'cause I an alicorn: Me have pegasus wings and unicorn horn, just like Mommy." She pointed to Princess Celestia.

"The princess ya mommy?" Lightning blinked in surprise and apparent confusion.

Twilight Sparkle nodded. "Uh-uh, and now she your mommy too. We get to be sissies!" Then she held up Smarty Pants and said. "And this Smarty Pants. She my friend. Say hi to Dusty, Smarty Pants."

"Hello, Dusty," Smarty Pants greeted in an exaggerated tone of voice. "I see you got to meet Twily. She's super nice, and so's her mommy. She keeps bringing over ponies for Twily to play with, and sometimes she joins in the fun."

The padded pegasus replied by grabbing hold of Smarty Pants, trying to snatch it out of Twilight's hooves.

Twilight grabbed Smarty Pants from the other end, refusing to let go! "Mine! You can't have Smarty Pants!"

"Me wanna play with Smarty Pants!" Lightning Dust insisted with a growl!

"But she mine!" Twilight protested.

Princess Celestia immediately intervened to break up the fight before it could escalate. "That's enough, both of you!" She scolded. "If you can't behave, I'll put you both in time out and take Smarty Pants away," To Lightning Dust she then instructed. "Dusty, we say 'please' when we want to have something that belongs to somepony else."

Lightning proceeded to ask Twilight. "Can me please have Smarty Pants to play with? Me not gonna hurt her. Me promise."

Reluctantly, Twilight let go of the doll and let Lightning Dust take hold of her. "Please be careful with her." She pleaded.

"Don't worry, Twily," Smarty Pants sought to reassure the padded alicorn. "You know I put up with a lot under you, not to mention when I was Winona's favorite chew toy. I'll be okay, I promise."

Lightning Dust, meanwhile, lifted Smarty Pants into the air and made loud noises as she proclaimed. "Me gonna fly just like the Wonderbolts! Me wanna fly like Spitfire!" And she held the doll aloft, swinging it around in circles for a while.

Celestia decided to take advantage of the opportunity, taking Twilight by the hoof and leading her away to get changed. "Now's an excellent time to take care of your wet diaper, Twily. We certainly wouldn't want a rash to spoil your fun with Dusty."

As Twilight was having her old diaper be removed, and her rump wiped clean, she looked up at the sun princess and asked her. "Are you gonna make me use the potty, Mommy?"

"Not unless you want to, Twily," The sun princess cooed as she bailed up the old diaper and the wipes, and threw them away in the trash. "I don't want to force you to do something you'd rather not do. We both agreed that you only need to try to use it once a week at most."

"Okay, Mommy," The padded alicorn nodded. "I'll think about it. But you'll love me no matter what I do, right?" The last line sounded just the tiniest bit uncertain.

Princess Celestia was quick to reassure her fellow alicorn. "Of course I will, Twily. Don't ever doubt that. Mommy will always love you and always be there for you no matter what. I will never let anything bad happen to you."

Twilight slowly sat up after a new diaper was fastened to her rump, happily hugging Princess Celestia tightly. "Thank you, Mommy! You're the best mommy ever!"

Celestia smiled as she returned the hug full force. "No, thank you, Twily. Thank you for letting me be your mommy. You've always been family to me. And this lets me make it official."

A short time after returning from being changed, Twilight was most surprised (but also greatly relieved) to receive Smarty Pants back from Lightning. The padded pegasus told the padded alicorn. "Me all done playing with Smarty Pants. You can have her back. Smarty Pants lots of fun, but she no talk to me."

Twilight giggled as she took hold of the doll once again. "That's because I usually do the talking for her."

"What are you talking about, Twily?" Smarty Pants retorted. "You know I can talk by myself if I want to. And I can do other things too: Like sing. Remember, you used to be unable to tinkle a drop unless I was singing to you while you were on the potty."

The padded alicorn's blush deepened. "Smarty Pants, you don't have to keep bringing that up all the time. Besides, you know I don't need that anymore. You've seen me go potty without you singing at all: I've pee-peed and poo-pooed in it without any singing at all."

But Lightning Dust, instead of laughing, seemed to whimper and shrink back. "No like the potty. Potty almost eat me. It not nice at all."

"Well, I don't really care for the potty either to be honest," Twilight declared. "I only really use it because my mommy wants me to use it sometimes. But she already says she'll love me no matter what. So I don't really try to use the potty unless I really have to. I like diapers better."

Lightning nodded. "Uh-huh, diapers safer. Diapers more comfy." She patted her padded rump to prove the point.

Twilight giggled, mimicking Lightning's gesture. "That's right. And Mommy always gets the biggest, poofiest diapers. That's why she's the best mommy ever! She even lets me drink her milkies, they taste yummy!"

"And you know what else tastes yummy, my little ponies?" The sun princess asked as she got both padded ponies to turn and face her. When they did so, they saw her carrying out a tray full of fresh cut veggies. "Snacks. I made sure to get the best snacks possible."

"Cookies?!" Lightning exclaimed as she waddled over.

Celestia shook her head. "No cookies. At least, not unless you eat your veggies, Dusty. And the same goes for you, Twily. Too many cookies and nothing else are not good for you. And you want to grow up big and strong, right?"

Twilight nodded back, puffing out her chest. "Uh-huh. Wanna grow up to be like you, Mommy." She then waddled over slowly but surely.

Satisfied with the response from one of her charges, the sun princess carefully set the tray of veggies down on the floor. "Go ahead, eat up." She encouraged.

Lightning Dust sniffed the vegetables and stuck out her tongue. "Yucky! No wanna!"

"But Dusty," Twilight protested as she sat down near the tray. "You gotta eat your veggies if you want cookies. Veggies make you big and strong, like Mommy." She proceeded to grab some baby carrots, and happily chomped down on them.

Smarty Pants encouraged. "Even though I don't really eat, I can see how happy Twily is when she eats her veggies for her mommy. You should eat them too, Dusty. Veggies are good for you. They're not yucky at all."

Lightning was still very hesitant about approaching the tray, and even more hesitant to touch, let alone eat any of the cut up vegetables. She very nearly looked like she was going to gag when she helped herself to some celery. But she managed to force it down, and soon she was grabbing as many veggies as she could get her hooves on. In the process, crumbs flew everywhere!

That was in stark contrast to Twilight, who ate her snack slowly and carefully. At least, until a plate of freshly baked chocolate chip cookies were presented to the two padded ponies. The sweet scent of the cookies overrode any instinct both padded mares might have had to do anything other than shove the cookies into their mouths as fast as they could!

"My goodness!" Princess Celestia playfully exclaimed afterward as she very carefully used a rag to wipe the mouths of both her charges. "What messy foals I have," Then, she exposed her teats to them. "Well, you'll both want milk to wash down those cookies. Don't worry, there's plenty of milk for you both. Just try not to drink too fast."

Twilight happily latched onto one of Celestia's teats and began to suckle, soon being rewarded for her efforts as rich, creamy milk slowly trickled down her throat.

Lightning Dust somewhat clumsily latched onto the other exposed teat, and then tried to emulate Twilight's actions as best she could. "Mmm." She dreamily declared, shutting her eyes and concentrating on nothing but suckling.

After what felt like several minutes worth of breastfeeding, the sun princess carefully brushed both padded ponies away from her teats and concealed them again. "That's enough for now," She told them. "Now, you two wait here while I go and get some supplies. I know of a fun activity you can do together."

The activity was hoof-painting. Princess Celestia used her magic to carry over two art easels, several blank sheets of paper, smocks, and of course colorful paints. She also set several wads of old newspaper down around the easels, so as to make sure any traces of paint wouldn't end up on the floors. No need to make the hired hooves work even harder, especially not after some of them had undoubtedly been pressed into service cleaning up Lightning's earlier accident.

"Why don't you both paint me some pretty pictures?" Celestia encouraged both Twilight Sparkle and Lightning Dust. "Maybe if it's good enough, I'll even hang it up on a fridge." Then she stepped back, hoping that doing so would give the two the freedom they needed to come up with inspiration.

Twilight carefully set Smarty Pants down a ways away from the paints and the easels. "I don't want to risk getting paint on you, Smarty Pants. That would take forever to wash off. And I don't know what I'd do without you."

"That's okay, Twily," Smarty Pants replied. "I'm not much of an artist anyway. But I know whatever you paint is sure to be spectacular. I still remember your old hoof paintings for your other mommy. She never took them down from the fridge, not even after you left to study with our current mommy."

The padded alicorn giggled. "Oh, I know. She still kept B.B.B.F.F.'s hoof paintings up too. She kept almost everything from when we were foals, even our old potty chair." Then, she stared at her easel as she tried to think about what to paint and what colors to use.

Lightning Dust didn't bother to think about what she'd paint or what colors she'd use to do so. She just dipped her hooves into the various paints and splattered them all over the easel without rhyme or reason. "Pretty colors!" She giggled, all the while drips of paint began to fall off the easel and onto the newspaper below. She was quickly getting paint all over her fur, not that she cared.

Twilight, by contrast, tried to be careful. She tried not to let her colors run or mix, and she tried to make sure only her hooves were covered in paint. She didn't want to make a mess for her mommy. She'd been pretty well behaved all day so far, and she didn't want to ruin that streak now. It was the least she could do to thank her mommy for not forcing her to potty train, even though the padded alicorn knew it would make the sun princess really happy.

At last, both padded ponies completed their paintings. And Princess Celestia came trotting over to inspect them.

Twilight happily and proudly showed off her painting first. It was rather crude, all things considered, but that just added to the charm of it. "It's a picture of me and you, Mommy," She told the older alicorn, pointing to the purple and yellow sketches of ponies standing next to each other. "I made you yellow, just like the sun," She pointed a hoof to a small yellow circle above. "See? There's the sun you raise. And that you and me, we're holding hooves. We're outside, on the grass, enjoying the day," She pointed to lines of green underneath the ponies. "Do you like it?" She hopefully asked.

The alicorn with a majestic white coat nodded quite slowly, holding up the painting with her magic and admiring it. "Oh Twily, it's beautiful!" It was all she took to keep from tearing up. "I can't wait to put this on my fridge," Then she trotted over to Lightning Dust, asking the padded pegasus. "And what did you paint for me, Dusty?"

"Me just painted pretty colors," Lightning Dust replied, then blushing a bit. "But me made a mess. Painting fun, though."

Celestia smiled and suppressed a giggle. "Well, it's a nice painting, even if it's just a bunch of swirls and lines. I guess it can be hard to come up with inspiration sometimes," Her smile slowly faded as she observed just how much paint Lightning had managed to smear all over herself. "But just look at you! Now you're all messy, Dusty. You're going to need a bath."

"Nu-uh, no bath!" Lightning protested and unfolded her wings, looking ready to fly off at a moment's notice. However, instead of doing that, she spread her legs and shut her eyes as she grunted. Soon, her tail started to hike upward.

"Is she actually-" Princess Celestia began to think. But her question was soon answered as she could see Lightning Dust's diaper starting to bulge in back, all the while the familiar stench of methane began to permeate the entire room.

The padded pegasus grunted and kept pushing, her legs spreading apart further as the bulge in her diaper grew bigger and bigger by the second. At last, with an audible "Fwop", the tapes of her diaper were ripped off and it fell to the ground with a thud. She smiled, apparently quite pleased with her dirty deed as she declared. "Diaper off. All in, all out. Now you change me."

The sun princess sighed, then exclaimed in only slightly exaggerated fashion. "My goodness! Did my milk do that to you, Dusty?! Now you really do need a bath and another diaper," To Twilight she then added. "Now Twily, why don't you..."

But before anything else could be said, Twilight started pushing. And soon, her diaper had filled up as well. "I messy too, Mommy," She declared. "Me have to take a bath too now, right?"

Celestia nodded, she couldn't bring herself to be mad with Twilight. Yet in the back of her mind, she was thinking. "Twilight did that on purpose, I'm sure of it. She really is getting attached to me. But is that such a bad thing? It's all just part of the act, right?"

Well, those were thoughts for another time and place. For right now, the alicorn with a majestic white coat had two very stinky padded ponies in desperate need of changing and bathing. So she used her magic to pick both her charges up (as well as Lightning Dust's very dirty diaper) and carried them into the bathroom. After discarding Lightning Dust's decimated diaper in the trash, she turned on the tap and let the tub slowly fill up with warm water.

Lightning Dust woke up several hours later with her mind still in a bit of a daze. "Where am I?" She muttered to herself. The last thing she could remember, she had been working on a stunt intended to surpass even the fabled Sonic Rainboom, convinced that such a move would be just the thing to impress the Wonderbolts. She still heavily resented having been kicked out of them just because of one incident that hadn't even really been her fault.

But the stunt had gone horribly wrong. While trying to build up enough speed to shatter the sound barrier, Lightning Dust had lost control and had crashed head on through one of the stained glass windows in the castle. Everything after that until now was a blur, almost like she'd been having an out of body experience. The pegasus pony vaguely recalled being "punished" by Princess Celestia, and having momentarily lost control of her bodily functions. But aside from that, she couldn't remember a thing.

Then, suddenly, Lightning's eyes noticed something on a nearby table. Being quite curious, she naturally picked it up and examined it carefully.

What Lightning Dust read made her eyes widen in disbelief, and what she saw attached to the note she was now reading only made her boil over with rage. There were several pictures of her clearly wearing diapers, playing with none other than Princess Twilight, who was also padded for some reason.

The note read as follows:

Dear Lightning Dust,

I'm sure you must be wondering by now where you are and what happened to you. Well, you ended up quite literally crashing into my castle. And in the process, it seems that you temporarily reverted back to the mentality of a foal.

Don't worry, the only other pony besides myself who saw you in such an infantile state was Twily. And she's already been sworn to secrecy. She won't tell a soul. And I trust you to do the same.

If you agree to keep Twily's secret a secret from everypony, then these pictures of you being treated as a foal won't end in every paper and magazine across all of Equestria. I might even be willing to talk to the new captain of the Wonderbolts, and see about letting you have a second chance with the team. Of course, if that happens, you'll have to start over from the very bottom of the totem pole.

But should you blab to anypony at all, your name and face will be all over Equestria. And it won't be in the way you intended.

Choose wisely,

Princess Celestia

Lightning let out a guttural roar as she threw down the note and the pictures. "I can't believe she did this to me!" She growled. "And I can't believe she's actually going to blackmail me! Me!"

But then the pegasus pony sighed, realizing the dilemma she was in. She couldn't tell anypony, not unless she wanted to have those pictures of her in diapers be circulated throughout all of Equestria.

Besides, the extreme daredevil really wanted that second chance with the Wonderbolts. She would do anything to convince them to let her back into their ranks, or even just back into their tryouts at the academy. Hopefully, this new captain (whoever she was) would be forgiving and generous, not like Spitfire. Lightning Dust could still remember how Spitfire (along with Soarin) had punished Lightning for her apparent "recklessness": Quite literally sending her down the drain.

Maud (Maud Pie)

Author's Note

Maud Pie won the tiebreaker, so she gets to be the character of focus here. I decided to base inspiration somewhat around Softer than the Rocks, which I did an unofficial sequel to last year. Of course, since that fics involves Maud's home in Ponyville, which she doesn't get until Season 7, and this is taking place in an AU around Season 6, I have to work around that.

I also drew on inspiration both from Pinkie Pie's chapter in the original story I'm continuing here, and on some headcanons involving toilets and potty training as discussed with Latecomer.

Characters that can only be done in group pairings:
Mane six
Spike
Princess Cadence
Shining Armor
Princess Luna
Octavia and Vinyl Scratch
Twilight Velvet
Spitfire (with or without Wonderbolts)
Lightning Dust
Maud Pie (without Mudbriar)

Characters previously voted on:
Moondancer - Two vots
Cheerilee - Two votes
Lyra (with Bon Bon) - One vote

Maud (Maud Pie)

Princess Celestia hummed a little tune to herself as she yet again made the trek across the castle to the private suite where Twilight was staying. She was already looking forward to another fun filled day spent in the role of "Mommy", with Twilight playing the oh so adorable role of "Twily". Despite the sun princess' growing concerns about how much of Twilight's behavior was just an act and how much of it was real, it wasn't enough to persuade her to stop or even slow down the treatment. Luna had yet to voice any more concerns to Celestia in spite of the nightmare just the other day, so all was okay.

As a matter of fact, things were more than okay. Princess Celestia had already reached out to somepony about being Twily's next playmate. This one had come at the suggestion of Pinkie Pie, who said this pony was "really good with foals" and would make for "an awesome big sister". So the alicorn with a majestic white coat had reached out to the pony Pinkie had suggested, and this pony had agreed without hesitation even after being briefed on what would be expected of her.

Celestia looked at a small, gold colored watch on one of her forehooves. She had gotten it to better keep track of time whenever she had to attend to her royal duties, determined to make them end more quickly if possible so that she would have more time to tend to every need of Twily's. "That's what a good mother should do." She thought to herself as she noticed that if all was going as planned, the next playmate for little Twily should be arriving very shortly.

Twilight, for her part, was already padded up and waiting within her bedroom. She made sure her padded plot was kept well hidden, so that any unsuspecting ponies who might stumble into the room by accident wouldn't discover her secret. All she could do now was wait, knowing that Princess Celestia was due to return at any minute, probably with another playmate in tow. Whoever it was, Twily was sure she was going to enjoy playing with them, doing whatever the playmate wanted to do.

So why did it seem like it was taking so long for Celestia to enter the room? Twilight was starting to grow just the slightest bit worried. "Do you think something happened to Mommy, Smarty Pants?" She asked the old doll.

Smarty Pants replied. "Come on, Twily. Your mommy is the strongest, smartest, nicest pony in all of Equestria. She'd never let anything happen to her. I'm sure she'll be here any minute. Just be patient."

Twilight plopped onto her padded posture and pouted. "Oh, but I hate waiting! I've been extra good today: I even kept my diaper clean for her, just like Mommy would want me to, even though I really didn't want to."

Fortunately for the padded princess, her lack of patience was not about to be put to the test. For a mere moment or so after she had finished speaking to Smarty Pants, she saw the knob on the door start to turn. Her heart began to beat with anticipation! Could it be?!

Sure enough, when the door opened all the way, in strolled Princess Celestia with that motherly smile on her face. "Hello, Twily!" She chipperly greeted, her voice radiating with love and warmth. "Sorry if I kept you waiting. But Mommy's here for you, now," She trotted over, looking her fellow alicorn over. "Do you need a diaper change, Twily? We wouldn't want you to get a rash."

Twilight shook her head from side to side. "No, Mommy. I'm good. My diaper's nice and clean, see?" She turned around and proudly presented the pristine padding to the princess. "Tada!"

Celestia's smile grew brighter. "Oh, that's amazing, Twily!" She showered the younger alicorn with exaggerated praise, treating her more like a potty training toddler instead of a full grown mare. "Good job!" Then she cleared her throat. "Then I guess that means you're ready to meet your next playmate."

"Ooh! Who is it?!" Twilight excitedly asked, already trying to think of who it might be!

Princess Celestia gave off a light laugh, then turned back towards the open door. "You can come in now." She said to it, apparently speaking to somepony waiting on the other side of it.

As if on cue, the sound of shuffling hooves could be heard as a very familiar earth pony mare came into the room, noticeably waddling about. Said earth pony currently had a violet colored pacifier dangling from a string around her neck, and instead of her usual dull green tunic was a somewhat more brightly colored green onesie that just barely fit her. Said onesie doing a very poor job of concealing a thick, white diaper that hugged her rear tightly.

The padded alicorn gasped as her eyes went wide! "No way!" She exclaimed in disbelief. She recognized this pony at once, but it was one of the last ponies she would've ever expected to see in diapers. "You're... Maud Pie!"

Maud Pie nodded quite slowly, speaking in that usual emotionless tone of hers. "Yes, Twily," She greeted the princess, using the assigned name for when Twilight was in her "little" headspace. "It's me. I'm here to be your playmate today. Your mommy told me all about it, and asked if I would join you," Something of a smile crept onto her face as she went on to say. "I figured it would be a good break from my rock studies at the university. The classes are very hard, and not just because they're dealing with rocks," She paused and blinked before adding. "That was a joke."

"Oh, sorry," Twilight replied and tried to snicker and chortle as best she could. "That was a good one, Maud. You're very funny! No wonder you and Pinkie Pie are sisters."

Maud nodded and seemed to blush. "Well actually, Pinkie Pie doesn't know about this yet. I haven't told her. If she found out... well, she'd probably start trying to take care of me the same way she takes care of the Cake twins. It'd be kind of weird to be foalsat by your baby sister instead of it being the other way around."

Twilight gave a knowing wink. "Relax, Maud. Your secret's safe with me. I won't tell a soul. And neither will Smarty Pants. Right, Smarty Pants?" She turned to the doll.

Smarty Pants quickly replied. "Of course, Twily. I couldn't tell anypony if I wanted to. You're one of the few ponies who understands me. Most ponies think I'm just an imaginary friend, even though we both know I'm not. I've been your friend since you were in diapers."

Twilight nodded back. "Uh-huh. We did everything together, I took you with me everywhere I went until I started attending magic kindergarten. Then I had to put you away so other ponies wouldn't make fun of me. But I still slept with you until I outgrew that too."

Maud only commented. "It must be nice having somepony you can trust to share secrets with," She looked down at herself. "The only friends I ever had were rocks. They're good listeners."

"Like Boulder?" Twilight questioned.

"Like Boulder," Maud replied. "I wanted to bring him with me, but I decided against it. It was a long train ride to get here. I didn't want to risk losing him."

The padded alicorn nodded back. "Uh-huh. I know I'd be really upset if I lost Smarty Pants anywhere. That's why I keep her with me at all times. I never let her out of my sight!"

Princess Celestia then smiled as she made sure to use her magic to carefully close the door behind her. "Well, it looks like I won't have to worry about either of you causing any trouble. You two can just stay here and play together all day long."

"Today is a good day to stay indoors," Maud spoke up as she pointed to a nearby window. "It's raining outside today." Sure enough, a quick glance out said window revealed that the sky was full of rain clouds. There wasn't any thunder or lightning, just rain and a lot of it.

"Aw, but it's fun to play in the rain sometimes." Twilight playfully whined.

Celestia shook her head from side to side and motherly scolded. "I don't think so, my little ponies. I wouldn't want you to get sick or covered with mud. That would take ages to clean up. Today is a strictly indoor play day. No ifs, ands, or buts."

Maud Pie then asked. "Speaking of butts," She looked back to her padded rump and asked. "Am I allowed to use the toi..." She paused and quickly corrected. "... the potty? Or do I have to stick with my diaper?"

The sun princess told the earth pony. "As long as you ask for permission first, you can use the potty if you want to, Maud. After all, Twily's in potty training too. We're still working on getting her to use the potty more often, even though I don't mind changing her."

"Okay," Maud blinked very slowly, then turned to Twilight. "So, what do you want to do first?"

"Well," The padded alicorn tried to think. She scratched her head with a hoof, but couldn't come up with anything. "What do you want to do, Maud? What kind of games do you like to play?"

The padded earth pony mare hmmed, popping her violet colored pacifier into her mouth and suckling on it as she was deep in contemplation. At last, popping the pacifier back out of her mouth, she proposed. "I have some special blocks that I made. We can play with them. There's a special kind of game I really like. I'll teach it to you."

Twilight clapped her hooves together. "Oh boy! A brand new game! Sounds like fun!" And she grabbed Smarty Pants with her magic. "Come on, Smarty Pants! Let's see if we can beat Maud at her own game!"

With only the steady downpouring of rain to serve as background ambience, the two padded ponies found a secluded spot in a corner of the bedroom with which to play with Maud's special blocks. They sat down across from each other, with Princess Celestia keeping a watchful eye on them from afar.

Before beginning the game, Maud Pie looked to her onesie and asked Twilight. "Is it okay if I take off my onesie first? I find it easier to concentrate with just my diaper and my pacifier."

Twilight nodded her approval. "That's fine by me, Maud. Whatever makes you feel comfortable."

Satisfied with the response, Maud turned her full attention to her onesie and slowly unbuttoned it. It seemed like she was quite skilled at the art of taking off and putting on her onesie, because in a matter of seconds she had fully unbuttoned it and set it aside. Now her diaper showed visibly, crinkling audibly and swaying with each step she took. When she sat back down, it compressed and crinkled even louder.

"So, how do we play, Maud?" Twilight Sparkle asked as she eyed the rather unusual blocks Maud had brought. They appeared to have been carved out of actual rocks, instead of being made of soft foam or wood like your usual foal blocks.

The padded, rock loving earth pony calmly explained to her playmate. "We each have our own stack of blocks: You've got yours and I've got mine. We take turns arranging and stacking them, and whoever uses all of their blocks first wins."

"Ah, I see," Twilight beamed. "That sounds easy enough. So who goes first?"

Maud raised up a hoof. "Not so fast, it's not that easy. See how each block is made of a different type of rock?" She held up two blocks that at first glance seemed to be similar, and explained. "For example: This one is made of quartz, and this one is made of limestone. You can only place blocks on top of each other or next to each other if they're of the same group: Igneous, sedimentary, metamorphic, or mineral. If you place rocks that aren't of the same group together, you lose. And you also lose if you can't place any blocks, or if your rock tower falls over."

Twilight blinked slowly. She was surprised by how... detailed this game was. She realized that she probably shouldn't have been so caught off guard given how much Maud loved rocks. Yet it still surprised her all the same. "You really went all out for this game, Maud."

Maud Pie nodded, then hoofed her opponent a piece of paper. "This should help you if you get stuck. It explains what rocks can go together and which ones can't. I don't need it because I know everything about rocks, but other ponies don't," A sigh escaped her lips. "I've really wanted somepony else to play this game with me, but I've never been able to since I left to get my rocktorate. The only ponies I played this game with before are Mom and Dad, we used to play it together when I was a foal."

The padded alicorn smiled. "Well, I'm happy to play this game with you as many times as you want, Maud," And she happily encouraged. "Why don't you go first, then? I think I get it, but I'll feel a lot more confident once I see the expert make her move."

Popping the violet colored pacifier back into her mouth, Maud thought for a moment before making the first move. She placed a block made of marble on the floor in front of her. Without taking the pacifier out of her mouth to speak, she said. "Your turn." The pacifier thus giving her words a slight lisp that could be heard even over the suckles.

Twilight turned to Smarty Pants while looking over her blocks. "Well, Smarty Pants, what do you think we should do for our first move? We should make sure the rock block we pick is one that can match up with the others."

Smarty Pants just replied by looking down at the piece of paper Maud had hoofed to Twilight. "I really don't know, Twily. I don't know much about rocks. Just pick one you think looks good. We're probably not going to beat Maud, she's got tons of experience with rocks. After all, she grew up on a rock farm."

Twilight gasped in realization! "That's right, I forgot! Pinkie even said they didn't really have diapers or foal toys growing up, they just used a pile of rocks for a bathroom. That means Maud probably had even less of a proper foalhood than Pinkie did. That must be why she likes to do stuff like this." Then she turned her attention to the rock blocks, eyeing them carefully and only occasionally glancing back at the piece of paper for reference. At last, she found one that she felt confident about using, and placed it on the ground in front of her.

Now it was Maud's turn to place a block. She spoke not a word as that violet colored pacifier of hers bobbed up and down in her mouth, all the while she was looking down at her blocks almost as if distracted by their intricate design. And after only a minute or so of silent contemplation, she made her move and signaled that her turn was over.

Several minutes thus passed as the two padded ponies took turns placing their rock blocks. Maud seemed to have no trouble deciding what blocks to place where to keep her tower balanced while making sure they matched, but Twilight found it rather difficult to follow all of Maud's rules. It didn't help that there was a nagging feeling in the back of the padded princess' mind about why Maud Pie seemed to be so at home with the mindset of a foal. It couldn't just be like Pinkie Pie in that she was trying to relieve a foalhood she never really had growing up on a rock farm. It had to be something more.

Yet the young alicorn found herself stumped about the best way to go about asking for more information. Maud could be a very difficult pony to read for ponies who didn't know her personally. Pinkie Pie seemed to be the only one who truly understood what made Maud Maud, no doubt because of their tight sibling bond that reminded Twilight a lot of the bond she shared with Shining Armor (or the bond between the Apple siblings for that matter).

At last, Maud broke the unofficial spell of silence by popping the pacifier out of her mouth, and she told her playmate. "You lose."

Twilight blinked in surprise. "What?"

Maud explained by pointing to the last block the princess had placed. "You just placed pyrite on top of sandstone. Those are not matching rock types, so you lose."

"I think she's right, Twily," Smarty Pants spoke up. "Those rocks don't look very similar to me."

The padded princess eyed her rock tower carefully. She couldn't tell for sure if Maud and Smarty Pants were correct, but she was inclined to believe them. Still, she wasn't really mad or upset about losing. It had been fun while it lasted.

Maud Pie stood up very slowly, trotting over to Twilight. "It's okay. I had fun playing with you. I hardly ever lose at this game unless it's on purpose. I'm just glad I had somepony willing to play this game with me. It's been so long since I was able to play it with anypony."

The young alicorn then saw fit to ask. "Can I ask you something, Maud?"

Maud blinked slowly and seemed to smile. "You just did."

The padded alicorn giggled in response. "Oh, I get it. Very funny, Maud," Then she cleared her throat and resumed questioning. "Is there a reason why you like to do these things? Is it because you grew up on a rock farm? Or is it something else?"

The earth pony mare didn't answer right away, she was too busy looking at Twilight's rear. After doing so for a good minute or two, she spoke up. "You should probably get changed first."

"Huh? What do you mean?" Twilight questioned, only to suddenly feel herself be levitated into the air by none other than Princess Celestia.

The sun princess seemed to be struggling to suppress a smirk. "You mean you haven't noticed yet, Twily? Your diaper is very wet. I'm surprised it hasn't leaked." With her magic, she effortlessly carried her charge across the room to the changing table and laid her gently upon it.

A raging blush formed on Twilight's face despite the fact that this was far from her first diaper change. "I... I didn't even notice. I was having so much fun playing Maud's game," She unhappily sighed. "And after I was so good at keeping my diaper clean, too. I'm sorry, Mommy."

Celestia just gently reassured Twilight while carrying out the diaper change in the blink of an eye. "It's okay, Twily. This is why you're not ready to get out of diapers yet. Everypony has accidents from time to time, even when they're in potty training like you are. It doesn't mean they're not trying. Just remember that if you ever do feel like you have to go, let me know so we can work on getting you on the potty. Okay?"

"Okay, Mommy." Twilight sincerely nodded as a fresh, spotless diaper was taped to her rump. She happily wiggled about in it, letting the fresh scent of cornstarch from the powder tickle her nostrils.

Once the diaper change was complete and Twilight was lifted off the changing table, she trotted back over to Maud (who had respectfully turned her head while Twilight had been undergoing the change just a moment earlier) and asked her unanswered question from earlier. "So, Maud, can you answer my question now?"

Maud blinked slowly once again, looking back to her own diaper as if she suspected something was off about it. Yet there was nothing to indicate anything was. It still looked clean, and there were no smells wafting through the air to suggest it had been used. So the rock loving earth pony explained. "Well, it all started when Marble started wetting the bed. It started happening not long after Pinkie Pie got her cutie mark."

"But if Marble was the one wetting the bed, wouldn't that mean she was the one who got put back in diapers?" Smarty Pants questioned.

Twilight made a shushing motion to Smarty Pants. "Smarty Pants, not now! It's rude to interrupt ponies when they're not finished talking!"

Maud wasn't bothered by the interruption. She just resumed speaking. "Marble did get put back into diapers for a little while because of that. And Limestone started teasing her about it. So I started wearing diapers too to make Limestone stop. It worked," A smile started to form on her face as she recalled. "At first I only thought I was going to be in diapers until Marble stopped needing them. But then I started to realize how much I missed wearing them as a foal. Once I was old enough, Mom and Dad took away my diapers and told me I could just go in the fields or on a pile of rocks like Limestone did. We didn't even have indoor plumbing at the time, so we didn't have anything other than chamber pots to use for potties."

Twilight's eyes went wide as she let out a gasp! She'd suspected that the Pie family had been rather... simple in their lifestyle. But she'd never once believed that they had gone without indoor plumbing for so long. It just seemed like something that everypony had access to these days, even more so than electricity.

"We did eventually get a flush toilet installed," Maud went on. "But we still mostly did our business in the fields, until Mom and Dad found out that other places don't really like it when you do that sort of thing. So we all had to learn to use the flush toilet in the outhouse instead. Marble actually thought it was a monster at first because it was so loud. Of course, I knew it wasn't, and eventually even Marble knew that too. But during the time I was learning how to use a toilet, I started to realize how much I missed being in diapers and being a foal."

The padded princess silently nodded. Since getting Smarty Pants back from Big Macintosh, she'd come to learn just how much she cherished memories of her foalhood. That had served as the catalyst by which she'd slowly gotten back into diapers, which in turn had led to her being babied by Princess Celestia.

Maud Pie continued. "So I started secretly buying my own diapers and smuggling them in so Mom and Dad wouldn't find out. It felt nice to feel softer than my surroundings," A smile slowly formed on her face. "Even using them again from time to time actually didn't feel as bad as I thought it would be. The only problem was getting rid of the evidence afterwards so nopony would know. I thought about telling Pinkie and Marble because I was sure they'd understand, but I didn't want them to get in trouble with Mom and Dad if they found out, so I just kept the secret to myself until I went away to study for my rocktorate. Now, I have freedom to wear and use diapers, and act like a foal."

Twilight waited to see if Maud would speak even more. But the rock loving earth pony was silent, signaling that her little speech was done. With that belief in mind, the padded princess waddled her way over to Maud and nuzzled her deeply in the side. "Well, your secret's still safe with Smarty Pants and I. And my mommy too. We won't tell anypony what you do with diapers. I think it's nice that you get to have the foalhood you didn't get to have on the rock farm."

"Thanks," Maud replied with a slight smile, showing more emotion than she usually did. "You're the first pony I ever felt brave enough to tell all of this. There was one other pony besides my sisters I thought of telling," A brief image flashed in her mind of that very pony. "But I only just started seeing him. I don't think I'm ready to tell him just yet. Especially since I don't know how I feel about him or if we'll see each other more often."

Princess Celestia then clapped her hooves. "Well, that was very brave of you to confess like that, Maud. You truly are a brave little pony. And a brave little pony like you deserves a reward," She cooed. "How would my little ponies feel about a snack of freshly baked chocolate chip cookies? I'm sure I could find some in the royal kitchens to share with you both. You deserve it for being so well behaved."

Twilight Sparkle eagerly licked her lips! "Oh boy! Cookies!" She started jumping up and down in excitement! "Aren't you excited too, Maud?!"

"Oh, I am," Maud replied as she returned to her usual stoic tone of voice. "Cookies do sound good. I remember that Granny Pie used to bake them all the time when she foalsat my sisters and I. That's how Pinkie Pie formed such a close bond with her."

The sun princess smiled and gave a knowing wink. "Looks like it's a deal, then. You two wait here." She disappeared in a flash from her horn, only to return shortly with a plate full of steaming hot chocolate chip cookies that she set down on a table.

It took every ounce of patience Twilight had not to immediately run to the table and grab a cookie off the plate. She knew she had to wait for permission from Celestia first, and that would only come once the cookies had cooled off a little.

Princess Celestia took advantage of this opportunity to say to her charge. "Well, Twily, I believe now would be an excellent time for you to try and use the potty."

Twilight let out a faint, seemingly playful whine. "Do I really have to, Mommy?"

"Come on, Twily," Smarty Pants encouraged. "Don't you wanna show Maud that you can be a big pony too?"

The padded alicorn sighed and folded. "Oh, alright. I'll try." She then let Princess Celestia lead her along to the bathroom, her diaper crinkling all the while.

Maud Pie, for her part, just popped the pacifier back into her mouth to suckle on it anew. She smiled as she looked back to her diaper, sitting down and poking at it just for the fun of it.

As for Twilight, the padded princess was soon promptly placed on the porcelain throne as her diaper was pulled down to her knees.

Princess Celestia encouraged in that motherly tone of hers. "Go ahead, Twily. Do whatever you have to do. I'll be right here if you need me. I promise, I won't let anything happen to you."

So the young alicorn just sat there, hind legs dangling off to the sides of the toilet. It was hard to tell whether this was part of her act, or if she truly wasn't thrilled about being forced to use the bathroom. True, she'd done it before whilst still in diapers: Both for her big brother and for her mother, and both times it hadn't been bad at all. Would it really be asking so much of her to use it again in front of Princess Celestia?

At last, the silence was broken as a faint tinkling sound could be heard echoing across the bowl. Celestia smiled, knowing what such a sound meant. "Well done, Twily!" She cooed with only slightly exaggerated praise! "I knew you could do it if you just tried. See how easy that was?"

"It was pretty easy, Mommy," Twilight beamed. "But it's okay if I still want to use my diaper sometimes, right?"

The alicorn with a majestic white coat happily nodded. "Of course, Twily. Whatever makes you happy. You don't have to use the potty all the time, just once in a while is good enough." She proceeded to help her fellow alicorn wipe up, then flushed the toilet, before pulling Twilight's diaper back up and directing the padded alicorn to the sink to wash her hooves.

The two alicorns then exited the bathroom together, and Celestia smiled as she eyed the plate of cookies. "Okay," She declared to both her charges. "I think the cookies have cooled off enough, my little ponies."

Maud yet again popped the pacifier out of her mouth and let it dangle from that string around her neck. She then waddled over with practiced precision to join Twilight at the table, as the two padded ponies had bibs tied around their necks (Celestia setting Maud's well worn pacifier aside for cleaning later).

Twilight and Maud then grabbed cookies off the plate one by one, shoving them into their mouths as crumbs flew everywhere!

Princess Celestia didn't mind at all, just sitting there and watching her charges devour the cookies at lightning speed until there were none left! Afterwards, she just casually retrieved a rag and used to wipe off both padded ponies' faces. "My, what messy foals I have." She cooed and chuckled at the same time.

"I couldn't help it!" Twilight giggled with playful innocence. "Those cookies were really good, Mommy!"

Celestia seemed to nod in agreement. Then, after wiping off Maud's face, she declared. "Well, you know what goes good with cookies, right?"

The padded alicorn immediately knew what Celestia had in mind, happily shouting! "Milkies!"

The sun princess gave a confirming nod, before exposing her teets. "That's right, Twily. Milkies from Mommy," She trotted carefully forward, motioning for her fellow alicorn to approach. "You know what to do, Twily. Just don't drink too fast, now," Then she turned to Maud. "Don't worry, there's plenty of milkies for you too, Maud. I'm sure you'll want something to wash those cookies down."

"Besides," Twilight said as she licked her lips. "Mommy's milkies are really, really good!" Soon afterward, she wrapped herself around one of Celestia's exposed teets and started to slowly suckle it. It wasn't long before her efforts were rewarded, as the rich, creamy taste of warm breast milk trickled down her throat.

Maud hesitated for but a moment before joining in. She loosely remembered her mom breast feeding Pinkie and Marble when they were really little, having done so without ever once flinching or showing any emotion. Looking back on it, the first signs that Pinkie Pie would turn out differently from her other sisters had been apparent: She had been far more energetic and enthusiastic about drinking the milk compared to Marble, and Cloudy had briefly mentioned how it was unlike when she'd nursed Limestone and Maud.

Maud Pie shut her eyes, remembering those memories long since past. She could well remember how much pride she'd initially taken in being the pony amongst her four siblings who had been the least difficult to raise as a foal. She hadn't put up a fuss at all while in diapers, and hadn't registered a syllable of protest when told she was old enough not to need them anymore. She had also at least initially taken great pride in being the first among her sisters to master use of the new flush toilet after it was installed, and thus being called upon to assist her sisters in learning how to use it as well.

Looking back on it all, however, the rock loving earth pony now found herself filled with the faintest hint of regret and longing. Her foalhood had basically been decided for her. She had gone along with every decision her parents had made without ever once thinking that she had any other choice. Only when she had informed her parents of her intention to leave the rock farm and go away to study for her rocktorate had she at all decided for herself what to do. Well, that and her secret effort to buy, wear, and use diapers.

The earth pony mare was only snapped out of her ponderings by the sudden sound of the passing of gas. Almost before she realized it, she was wetting and messing her diaper almost entirely on instinct. So distracted had she been with her memories and ponderings that she hadn't noticed at all the warning signs her body had been trying to send to her brain. But it was too late to stop her body from relieving itself. Fortunately, it was all over very quickly. And her diaper more than did its job of containing everything she had just done. Good thing she'd thought ahead and bought the extra absorbent brands.

"Oh, goodness!" Celestia dramatically exclaimed with a wave of her hoof. "Did my milkies do that to you, Maud? I've never had that happen before."

Maud Pie just blushed bright red with shame. "I guess I just wasn't paying attention. But isn't that what a foal would do?"

Twilight giggled and laughed. "Yeah, it defintiely is, Maud."

"Oh goodness!" Smarty Pants remarked as she threw a hoof over her face. "And here I thought Twily was the stinkiest baby there ever was!"

Maud just sighed. "Growing up on the rock farm, I got used to smells like this even after we had the flush toilet installed." Then she felt herself be lifted into the air and carried to the changing table to have her diaper changed.

Maud Pie most certainly enjoyed her playtime with Twilight on that cloudy, rainy day. A part of her wished more than anything that it didn't have to end and that she could go on playing forever. Alas, the rational part of her mind told her that was impossible. Like it or not, the day came to an end. And that meant Maud had to go back to being a big pony again, though not without promising Princess Celestia not to share a word about Twilight's secret with anypony (except for Pinkie Pie, but only because the pink party pony knew about the secret too).

Upon returning to her dorm room at the university where she stayed, however, the rock loving earth pony was most surprised to find that there was a letter waiting for her on the nightstand next to her bed. Being a curious sort of pony, she trotted over to inspect the letter and picked it up. It read as follows:

Dear Maud Pie,

Thank you again for agreeing to be Twily's playmate. I think she really enjoyed getting to confide through you some of her conflicting feelings about why she likes to do all of this, as much as she enjoyed having somepony on her level.

Rest assured, I don't think any less of you for what you told me. If you ever decide to tell anypony else about your secret, you'll have my support.

I hope you don't mind, but I took the liberty of arranging a little something for you as a reward. If you ever feel like you need a break from being a big pony, just let me know. I'd be happy to arrange for another playdate between you and Twily.

Sincerely,

Princess Celestia

Looking underneath the letter, Maud was shocked to discover an attachment to it! It was a flyer advertising an archeological dig that was to take place in the Ghastly Gorge, a mere hour or so train ride from Ponyville. Specifically, this dig was hoping to hire somepony skilled and well versed in identifying various rock formations, so as to aid in the mapping out of the gorge and its surrounding environment.

Maud Pie knew at once that such an opening was perfect for her. Not only would she be able to put her applied knowledge to work in a real life environment, but she might have the opportunity to swing by Ponyville when it was all over. Having learned that Pinkie Pie had been put in charge of Sugarcube Corner a while back, Maud felt that perhaps she could surprise her sister in more ways than one.

Moonie (Moondancer)

Author's Note

Moondancer won the tiebreaker this time, so she gets to be the character of focus here. Inspiration was partially drawn from her prompt in "Potty Training Tales", which can be viewed here. I also drew a little bit from Something to Rave About 2: Second Night, itself an unofficial sequel to Something to Rave About. There is also a faint refernece to Photoshoot by Nido_King.

Tiber Septim II proposed having Twilight and Moondancer do a clown act to make Celestia laugh, and Scootabom1 proposed having Celestia use a spell to make them go on a storybook adventure (after previously suggesting it be a bedtime story adventure). So I decided to combine them both into a sort of storybook circus, like the expansion of Walt Disney World's Fantasy Land.

Again, remember that you are free to vote for any characters not already voted on as long as they meet the eligibility requirements. And you can also propose what you'd like those characters to do with Twily. As a reminder, you don't have to do it in a comment here. You can post suggestions and cast votes via PM if you'd rather do that.

Characters previously voted on:
Cheerilee - Two votes
Lyra (with Bon Bon) - One vote

Moonie (Moondancer)

"Oh my goodness, Twily!" Princess Celestia exclaimed in only slightly exaggerated fashion, fanning a hoof across her nose to try and ward off the powerful stench that was wafting through the air. This wasn't the first time she'd changed the dirty diaper of her fellow alicorn and princess, but it seemed like this one was especially stinky for some reason. "What did you eat that made you so stinky today?!"

Twilight failed to hide the raging blush on her cheeks as she lay upon the changing table fully exposed, her dirty diaper opened to reveal the extent of her shame. "Sorry, Mommy," She appeared to sincerely apologize. "I didn't think it would be that bad, really. But I didn't feel like using the potty," She whimpered and shrank from the sun princess' gaze. "Please don't be mad at me. I promise I'll try harder to make it to the potty in time the next time I have to go poo poo."

But Celestia simply shook her head and gently reassured Twilight. "I'm not mad at you, Twily. I want you to do whatever makes you comfortable. I shouldn't be trying to put pressure on you to use the potty if you'd rather stick to your diapers. I really don't mind any of this." She proceeded to toss the dirty diaper into a diaper pail, and set to work on wiping the young alicorn's stinky flanks. As she did so, she couldn't help but think. "Twilight's been doing number ones and number twos in her diaper far more often as of late compared to when we started doing this. Luna hasn't voiced any further concerns yet, but is it possible this is starting to negatively affect Twilight in some way? Making her regress and act like more of a foal?"

Unsure of herself, the sun princess just continued the wiping job, all the while continuing to think. "Oh, what am I so worried about? Twilight's using her diapers more often because she feels more comfortable doing so around me. Besides, I've helped her open up to so many of her friends, and they've all accepted this side of her. Even her parents don't seem to mind it. So I'll keep doing it as long as she still wants me to do it. She knows she can stop at any time." Just to be sure, she immediately saw fit to ask her fellow alicorn. "Twilight?"

The recently wiped clean young princess looked up at her fellow alicorn, surprised to be called by her real name instead of her more foalish name. "Yes, Mommy?" She asked in uncertainty, her voice sounding just a touch more... mature for lack of a better word.

The elder alicorn paused in hesitation for a moment, apparently deep in contemplation. Then at last she said. "You do know that we can stop this at any time if you feel uncomfortable, right?"

At that, Twilight let out a playful, foalish giggle and wiggled about on the changing table. "Of course I know that. Why would I want to stop? You're the best mommy ever! I mean it! Only you could care for me no matter how stinky I get or how many messes I make."

That seemed to satisfy Celestia, who breathed a sigh of relief. "Well, as long as you think that way, Twily, I won't force you to stop. But if you ever change your mind, let me know. And remember," She added with a knowing wink. "You can't tell anypony not already in the know. The tabloids would have a field day if they found out you're still in diapers at your age."

"I can't help it if I like my diapees, Mommy!" Twilight giggled some more. "Now come on, put another one on me!" And she lay back down on the changing table in anticipation.

Princess Celestia quickly unfolded a new diaper, taped it to Twilight's rump, and sprinkled in a generous helping of foal powder to ensure there wouldn't be a rash. Then she helped her fellow alicorn down from the table. "There we go, Twily. All nice and clean again."

"Thank you, Mommy!" The diapered princess gave Celestia a big hug, then waddled over to where she had left Smarty Pants lying on the floor. She picked up the old doll and said to it. "Sorry that took so long, Smarty Pants. But now I'm back, we can play again."

"Playtime with you is always a blast, Twily." Smarty Pants said in reply.

Yet it was then that Princess Celestia clapped her hooves, drawing Twilight's attention. "Now Twily, you should wait. There's a certain somepony who I'm sure would love to play with you and Smarty Pants."

Twilight became all excited, her eyes going wide! "Really?! Who is it this time, Mommy?! Do I know them?!"

The sun princess nodded as a big smile crept across her face. "Oh, I'm sure you do. The two of you go way back, back to when you were just little ponies. Maybe even before then. Heck, you two are so alike you could probably pass for twin sisters if I didn't know better."

Almost immediately, a picture of the pony Celestia was talking about formed in the padded alicorn's mind. She let out an excited gasp, bouncing up and down in anticipation! "You mean it's...!"

Before Twilight could finish her sentence, the door to her bedroom turned. In trotted a familiar looking cream coated unicorn mare with glasses. She had shed the black sweater she usually wore, and had taken the liberty of styling her mane and tail to look exactly like Twilight's. Around her flanks was wrapped a thick, white, very poofy diaper that pushed her legs apart. Yet she trotted about in it no problem despite the waddle it gave her movements.

The unicorn waddled right up to Twilight and giggled, swishing her tail and showing off her padded posture with pride. "Hi, Twilight... I mean, Twily," She corrected herself, pushing her glasses into place. "Sorry, still getting used to that."

Twilight felt her wings poof outward in excitement! She immediately pulled the unicorn in for a big hug! "Moondancer! Oh, I can't believe it's you!"

Princess Celestia watched the scene unfold with a smile of her own.

When the hug ended, Moondancer blushed. "I'm actually kind of surprised that you of all ponies are into this: Wearing diapers and acting like a big foal. I thought I was the only one among our friends who wanted to go back to diapers: Wearing and using."

"Why would you think I wouldn't be into this?" Twilight questioned her new playmate. "With how close we were when we were younger, why would you think you'd be the only one wanting to go back to diapers full time? Or at least, as close to full time as possible?"

Moondancer appeared to frown, her eyes narrowing a bit and her tone of voice taking on one of resentment. "Don't tell me you've forgotten. We were the first among our peers to be potty trained, only Lyra ever got a leg up on us because she was already using the toilet when we were stuck with training potties. And on your third birthday, you demonstrated quite clearly that your decision to hold off on starting the training until then was wise. You didn't have a single accident after you started, whereas I had several."

At that, the padded alicorn seemed to remember and recall memories long since passed! "Oh!" She exclaimed in realization. "I remember now," She then giggled a bit. "And at your next birthday party, your parents made you sit on the big potty for hours with everypony watching. I know some of our friends who didn't know better were wondering if you were gonna go down the drain."

"Is it bad if I wished I could've, just to be able to get away from everypony?" Moondancer lamented. "It was so embarrassing to sit there in front of everypony. I was never good at using the potty in front of others. Demonstrating it was always harder than when I just did it. You didn't seem to have that problem, and neither did Lyra. Even Minuette, once she finally started potty training, could do it no problem. I was always the shy one who couldn't do number one or number two for anypony other than my parents or my big sister."

Twilight blushed, levitating over Smarty Pants. "Well, I could only really do it because Smarty Pants helped me. She'd always sing to me whenever I was on the potty, even the big potty. If it wasn't for her, I couldn't have tinkled a drop, let alone do anything else. Isn't that right, Smarty Pants?"

Much to Moondancer's shock and surprise, the doll spoke. Of course, she knew it was really Twilight speaking through the doll, but it still surprised her all the same. "It's true. Twily just needed a distraction, because otherwise she'd start thinking about why she hadn't gone, and that made it harder for her to go pee pee or poo poo. I'm guessing you never had anypony do that for you."

The glasses wearing unicorn's frown only slightly lessened as she replied. "No, never. I never would've believed Twilight of all ponies would need that kind of help. My parents seemed to think that if my big sister could be fully trained and out of diapers by the time she was four, there was no reason why the same couldn't be true for me. And if my big sister hadn't been so willing to teach me how she did it, I probably wouldn't have graduated from diapers until I was in magic kindergarten."

"Well, at least we still had our little secret club between ourselves and Lyra," Twilight giggled. "Even if it wasn't much of a secret. We only got to maintain it for about a year before all our friends started potty training too. I know we were all shocked when Minuette finally got out of diapers. She was still wearing them when she was in magic kindergarten, not that it seemed to bother her."

Moondancer sighed anew. "Yeah, and I wouldn't be surprised if I found out she wanted to go back to diapers. As far as I know, she hasn't. But maybe she's like you and she's really good about keeping it a secret," She looked back to her own well taped diaper. "I thought once I finally worked up the courage to try wearing diapers again, that all my fears and worries would just disappear. They didn't. I even went to this special club just for ponies like me who like to wear diapers. But all I did was draw more unwanted attention to myself," She shuddered. "If the club DJ hadn't intervened when she did, I probably would've died. At least she was understanding, she was just as insecure about diapers as I was. But I haven't mustered up the courage to go back there yet."

Twilight trotted over and nuzzled Moondancer in the side. "Well, your secret's safe with me, Moondancer."

"Just call me Moonie instead," Moondancer insisted in a somewhat upset tone of voice. "After all, you call yourself Twily and call Princess Celestia your mommy," She turned to the sun princess. "Do I have to call you Mommy too?"

"Only if you want to, Moonie," Princess Celestia replied in a motherly tone. "Just like with Twily, I want you to do whatever makes you feel comfortable and cared for. The only rule I enforce is that you can't change your own diapers. After all, foals don't know how to do it. That's why they have mommies and daddies to do it for them. Don't worry, I'm used to changing diapers. Anything you do in them won't surprise me," She playfully added. "I just hope you're not as big a stinker as Twily is."

"Mommy!" Twilight playfully whined.

Smarty Pants just added. "It's true though, Twily. You can be really stinky sometimes."

"Smarty Pants! I thought you were on my side!" Twilight remarked as her blush returned with a vengance.

Moondancer, however, sympathetically replied to her fellow padded pony. "Hey, you can't help it if you're stinky. It's what foals do," She was quick to add. "I've never had somepony change my diaper, so I'm curious to see what it will feel like if it has to happen."

"Oh, it's the best feeling ever, Moonie!" Twilight happily exclaimed! "I'm sure you'll get to love it as much as I do if you get the chance to experience it!"

The glasses wearing unicorn simply sat down on her padded plot, making it crinkle. "Guess we'll just wait and see what happens. After all, I bought the thickest, most absorbent diaper brand I could find. It seems a shame not to test it out."

Twilight quickly moved to sit down next to Moondancer, showing support and solidarity for her fellow padded pony. The two big foals sat there for a bit, blinking their eyes whilst saying nothing to one another.

Of course, the spell of silence didn't last long. And Moondancer was soon asking. "So, what should we do, Twily? I assume you know more than I do what kind of fun big foals like us can have."

As if in response to the glasses wearing unicorn's question, both padded ponies heard their stomachs emit audible gurgles.

Celestia smiled and cooed. "Well, it sounds to me like we should have meal time first," Ushering her diapered charges to either side of her, she gestured. "Come, my little ponies. Let's go down to the royal dining room and get you fed." Then, she lit up her horn and teleported herself and her foals away.

The three reappeared in the empty dining room a moment later, Twilight and Moondancer both gasping as their mouths left gaping in awe at what they saw! Two large, elegantly detailed highchairs had been placed side by side at one of the long table, and both had their bars currently unlatched. It was quite obvious who they were meant for.

"Mommy, how were you able to get highchairs to fit us?" Twilight questioned as she and Moondancer were led before the highchairs and then floated into them via the sun princess' magic.

Princess Celestia happily explained whilst levitating both padded ponies into place. "Let's just say that when Luna went shopping after we learned Cadence was pregnant, she didn't quite know what size an alicorn foal would be. Cadence was too embarrassed to return all the supplies after she had Flurry Heart, so she asked me to hang onto them."

The younger alicorn giggled, kicking about in her pampers as the bar of her highchair was latched shut after she was placed into the seat. "Knowing Cadence, she probably diapered my brother and used Luna's supplies for parenting classes while she was pregnant! B.B.B.F.F. always did tend to act like a big foal, which I guess isn't surprising given what I now know about his foalhood."

The glasses wearing unicorn sitting in the other highchair could only lament. "I wish my big sister was as fun and loving as your brother was, Twilight. Aside from demonstrating how big ponies go potty during my training, or helping me with my homework sometimes when I was a little older, she and I mostly kept to ourselves. And I can't imagine she'd be very proud of me if she saw me like this."

Twilight leaned over in her highchair to talk to her fellow padded pony. "Hey, who cares if your first foalhood wasn't so great? That's all the more reason why you should enjoy your second one and be free. Do whatever you feel like doing, not what other ponies tell you you have to do. If I could learn how to live without books, you can totally learn to do the same. After all, there aren't really books on being a big foal."

Moondancer adjusted her glasses and briefly fiddled with her mane a bit. "Yeah, I know. Aside from a psychology book that briefly touched on them, there wasn't a lot of subject material. All the other books I could find on foals had to do with foalcare and raising foals."

Celestia then approached the two diaper wearing mares as they sat in their highchairs, levitating several jars of different flavored foal food, complete with bright red colored plastic spoons. "It is time for num-nums, little ones," She turned to Moondancer. "I hope you aren't a picky or fussy eater, Moonie. These foods are some of Twily's favorites. So if she likes them, you should like them too."

"Couldn't I have something yummier?" The glasses wearing unicorn questioned. From the way she spoke, it was hard to tell whether it was an act or if she was being sincere.

The sun princess replied with a knowing wink. "Well, if you and Twily both behave, I believe there's some ice cream in the kitchen. But you need your nutrition first. After all, Moonie, I assume you want to grow up big and strong, just like Twily." And to prove her point, she fed her fellow alicorn first.

Moondancer watched in silence as jar after jar was unscrewed, and Twilight happily devoured the various colored goops as the plastic spoon was dipped into them. It was all done with practiced precision, which wasn't surprising given how close the two princesses seemed to be. They had settled quite comfortably into their assigned roles. Whereas Moondancer was still uncertain of just how far she wanted to go. She wanted to let go, to be as carefree as Twilight. But a small part of her brain kept nagging at her, telling her that this sort of behavior was wrong.

At last, Princess Celestia had finished spoon feeding Twilight. She proceeded to pat the younger alicorn's back a few times, causing Twilight to playfully let out a loud belch. The elder alicorn wasn't bothered in the slightest, and simply cooed. "Good girl, Twily. Let it all out," She then turned her attention to the other padded pony in her presence. "Okay, Moonie. Now it's your turn," Dipping a different plastic spoon into one of the jars, she soon brought it to the unicorn's mouth as she instructed. "Come on. Open up. Be a good little pony."

The padded unicorn reluctantly obeyed, opening her mouth as wide as she could. She swallowed hard when the spoon's contents were deposited onto her tongue. That's when the taste hit her! It was almost overwhelming! "Whoa!" She exclaimed as she leaned back in her highchair. "I can't remember the last time I tasted something so sweet!"

Celestia smiled. "Well well, seems like you're a pretty good foal when it comes to spoon feeding, Moonie." And she proceeded to repeat the process several times over.

By the time the spoon feeding was done, Moondancer was beginning to feel nice and full. She didn't even mind the fact that she'd gotten trace amounts of different flavors of foal food all over her face. She just licked her lips, cleaning her face as best she could. It seemed she was slowly but surely settling into the mentality of an adult foal, just a little.

The alicorn mare with a majestic white coat stood up soon afterward, declaring. "A deal's a deal, my little ponies. Stay right here while I go get the ice cream." She returned shortly with the aforementioned sweet treat.

The glasses wearing unicorn excitedly rocked back and forth on her pampers when she saw the flavor of ice cream! "It's my favorite flavor: Cookies 'n cream!"

"No way! That's my favorite flavor too!" Twilight declared. Whether she meant it or was just playing along was hard to tell.

Princess Celestia flashed a motherly smile. "Well, I guess it's a good thing there's still half a carton of it left. That should be plenty between you two both." She proceeded to deposit a large scoop of the ice cream into large bowls, which she then presented to both diapered mares still sitting in their highchairs.

Twilight and Moondancer polished off the ice cream in no time at all. And neither of them protested when their faces were wiped clean with a rag afterwards.

"My my, what messy foals I have today." Celestia cooed as she wiped off the stained cheeks of both her charges.

Twilight just giggled, as did Moondancer. They didn't seem to care in the least.

Once Princess Celestia was satisfied that she'd gotten all the stains removed, she levitated the wet rag away and unlatched the bars on both highchairs, watching as the two big foals tumbled out and onto their padded rears. They seemed to be having fun together. It really was like they were sisters it seemed.

The padded ponies and the princess returned soon afterward to the royal bedroom Twilight was staying in, Twilight immediately trotting over to Smarty Pants to pick her up, whilst taking notice of the fact that the doll's arms were folded over. "Sorry, Smarty Pants," She apologized. "I didn't think you'd like watching Moonie and I eat since you can't do the same."

"Oh, Twily, I'm not mad," Smarty Pants insisted. "Even so, I don't like it when you leave me alone for so long. You know we do everything together, even sleep together."

"Yeah, I know," Twilight nodded back to the doll. "And I promise, from now on I won't leave your side. You can join in the fun with Moonie and I."

Smarty Pants seemed to smile. "I'd like that very much, Twily. I know we're gonna have lots of fun together, just like we always do with your playmates!"

Moondancer then asked her fellow padded pony. "So, now that we've been fed, what should we do next? Any ideas, Twily?"

The padded alicorn started to think, when she was suddenly distracted by the sound of loud music. Curious to see where it was coming from, she waddled over to a nearby window to have a look, and Moondancer followed after her.

Looking off into the distance, the two big foals could see what looked like a rather large circus tent that had been set up within the very heart of Canterlot. Various vendors were selling things like carrot dogs, peanuts, popcorn, cotton candy, and other treats. Performers of all types trotted to and fro, getting everything ready for the show to take place under the big top. And the source of the loud music revealed itself in the form of a large pipe organ.

Twilight turned away from the window and excitedly jumped up and down as she asked Princess Celestia! "Can we go to the circus, Mommy? Please?" She adopted the best pleading face she could muster up.

"Yeah? Can we go? It sounds like fun." Moondancer commented as she joined Twilight in pleading.

Princess Celestia wasn't persuaded for a second. "And let everypony in Canterlot see you two in diapers? I think not," She sought to reassure the two. "There'll be plenty of opportunities to see the circus some other time. I'm sure it will be back in Canterlot before long. Or perhaps we can wait until it comes to Ponyville and visit it then. The ponies of Ponyville are far less judging than the ponies of Canterlot, especially since a good number of them already know about Twily's secret." She delivered the last line with a knowing wink.

Moondancer then proposed while looking to her padded plot. "What if we agreed to use the potty before and after we went to the circus? Then we wouldn't have to wear diapers, and nopony would know about our secret."

"Circus shows are rather long," Celestia pointed out. "And it looks like the show is about to begin. I'm not sure I could secure tickets for the three of us on short notice. As tempted as I am by your offer, Moonie, I'm not sure I can trust you and Twily to behave yourselves, especially since you'd both have to use the potty right now while I go get the tickets."

"Why can't we just use the potty at the circus?" Twilight questioned. "They have potties there, right, Mommy? We could go right before the show starts, or during a break."

The sun princess protested. "Absolutely not! The circus' bathrooms are filthy! I will not have you both getting sick on my watch!" She then apologized. "I'm sorry, my little ponies, but we will not be going to the circus today. Maybe if you two behave for the rest of the day, we can visit it tomorrow before they leave Canterlot."

Both padded ponies let out whines and sighs of disappointment. It seemed they had both been looking forward to the idea of going to the circus (even considering Twilight had been to a carnival and an arcade).

Smarty Pants then made the suggestion. "Hey, if we can't go to the circus, why don't we bring the circus here? We can make our own circus together!"

"With just the three of us?" Moondancer pondered.

"Why not? All we need is our imaginations," Smarty Pants encouraged. "Anything's possible when you use your imagination. And Twily certainly has an active imagination. Just ask her."

Twilight giggled, poking at her pampers. "It's true. I even thought the potty was a monster, until B.B.F.F.F. helped me realize it wasn't. With an imagination like that, we could easily make our own circus."

However, Princess Celestia spoke up. "Actually, who says the circus has to be pretend? What if there was a way for you to not only go to the circus, but be part of the circus?"

"What do you mean, Mommy?" The padded alicorn pondered.

But the glasses wearing unicorn seemed to know what the sun princess was suggesting. "You're thinking of Hayscartes' method, aren't you? I've been studying that, but I've never even come close to pulling it off."

Celestia gave a firm nod. "Well, perhaps it would be best if I attempted the spell then. As it just so happens, I have a storybook about the circus that's just right for foals of all ages. And if you run into any trouble or danger, I can poof us all back out of the book no problem."

Twilight's face began to light up like stars in the night sky! "That would be great, Mommy! Let's do it!"

The elder alicorn grinned, trotting away. "Alright then, it's settled. We'll go into the storybook circus together, and my foals will be part of the show. We'll get to go on an adventure from the safety of this room."

It wasn't long before Princess Celestia returned, holding aloft a rather large and brightly colored picture book with her magic. She placed it on the ground, letting her charges see the title that read: Let's Go to the Circus in large and foalish letters.

"Now, before we begin," The sun princess declared as she eyed the two padded ponies. "Does anypony need to go potty or have their diaper changed? Once we enter into the book, there'll be no opportunities for potty breaks or diaper changes until we come out of it."

Twilight swished her tail and innocently replied. "I'm good, Mommy. I don't have to go."

Moondancer chimed in. "I guess if Twily doesn't have to go, then I don't either." In the back of her mind, she was thinking. "I'm sure I can hold it until we get done with the story. Besides, Twilight apparently goes potty in her diapers all the time. If she can do it and not be bothered, then I can do it too if I have to."

Satisfied with the response, Celestia took the liberty of lighting up her horn. The magic quickly flowed out from her horn, enveloping herself, Twilight, Moondancer, and Smarty Pants. Then it turned to the book, shrinking down the ponies and doll as they were pulled into the book's large pages.

Following a bright flash, all found themselves within the pages of the storybook. Its surroundings slowly but surely came to life: A large circus tent that could fit hundreds of ponies appeared, filled up with cardboard cutouts and paper ponies that sat on benches on all sides facing three large rings.

Princess Celestia herself happened to be sitting in the audience, looking on as Twilight and Moondancer stood within the three rings. Even though the show had yet to begin, she clapped and cheered to show her approval of anything they would do.

"We are here at the circus," A high pitched, childish voice spoke up as the circus took shape. "It is inside of a very large tent that is called a big top. Ponies of all ages come from far and wide to see the show today."

Suddenly, Smarty Pants emerged in one of the rings with a large mane around its neck. The doll let out a ferocious roar! And just as suddenly, Twilight and Moondancer found themselves facing the roaring doll with whips. The voice from before declared. "There are all kinds of acts to see. The lion tamers and other animal trainers command all kinds of large animals to perform tricks for the crowd."

Twilight took the lead in doing what the narration had said. Cracking the whip, she uttered the command. "Smarty Pants, jump!" And the doll obeyed without question.

Moondancer quickly did the same, bringing up a large hoop as she shouted! "Smarty Pants, I command you to jump through this ring!" Sure enough, that's what Smarty Pants did.

Princess Celestia watched the performance with brief looks of concern, concern that melted away when she saw Twilight and Moondancer handle the doll turned lion with ease. Yet her worries returned when the doll disappeared and a new display appeared in a ring, Twilight and Moondancer popping up inside of said ring.

In this ring was a large tightrope that rose up towards the ceiling of the big top. There was a net beneath it for safety, but the net seemed a ways down. The tightrope, meanwhile, stretched across the entire length of the ring it was in, Twilight and Moondancer standing on opposite ends.

The voice continued. "Tightrope walkers and acrobats walk across a large rope, performing all sorts of incredible tricks. They are protected from harm by a large net that will catch them if they should happen to fall." And as soon as it finished, the two padded ponies were doing things like riding a unicycle across the tightrope, or holding a large pole for balance as they walked back and forth on the tightrope. The rope occasionally swayed, but did not break.

From there, the attention switched to the third and final ring as Twilight and Moondancer were brought safely back down to the ground. Suddenly, their bodies changed. Their faces were covered with a white powder that looked almost like a mask, and were heavy with make-up and eyeshadow. They wore bright yellow jackets and gleaming red suspenders that were comically oversized. Most noticeable of all, their noses became big and red, almost like bouncing balls.

Princess Celestia couldn't stop herself from laughing hysterically as she watched the two padded ponies run around the ring, performing all sorts of funny acts both separate and together. And it seemed she wasn't the only one who found the performance of the padded ponies to be absolutely ridiculous (in a good way, mind you). The many cardboard cutouts and paper ponies could be heard laughing too. Their joyous cries echoed throughout the whole big top.

Despite this, the voice from before could be heard clear as day as it said. "A very popular act in the circus is the clowns. They dress up in funny clothes and funny costumes, and wear lots of make-up in order to make ponies laugh. Some clowns are sad clowns that have sad faces, while others are happy clowns that have smiling faces. And they often travel around in tiny little cars that are much too small for them. Yet they manage to fit into them with the greatest of ease."

Sure enough, a tiny sized bright yellow car with a windup key appeared before the two big foals, and from it emerged Smarty Pants all dressed up to look just like Twilight and Moondancer. The doll proceeded to chase after the two with a big, rubber bat, and the padded ponies pretended to be scared, running this way and that.

Page after page went by, with Twilight, Moondancer, and Smarty Pants all changing as needed to fit the roles described by the book. The final act saw Twilight bravely climb into the barrel of a large cannon with only a helmet for protection, before Moondancer brandished a matchstick and used it to light a fuse. The flame traveled along the length of the fuse until it reached the cannon, which shot Twilight out with a loud "Boom!" She flew across the big top as the audience watched, many emitting gasps (Princess Celestia included)!

Fortunately, the padded alicorn landed safely within a large net at the other end of the big top. The audience burst into thunderous applause, with ponies clapping, cheering, and even whistling in approval.

From there, Twilight was magically brought back to the center ring with Moondancer and Smarty Pants, all of them now displaying costumes from their many different roles. And they all bowed as the audience tossed roses to them from their seats. The voice concluded by saying. "When the show is over, all the circus performers return to the center ring and bow to the audience. The audience may sometimes show their appreciation by tossing roses to the performers. The circus is a truly wonderful place to visit."

Just like that, the story was over. And with a poof, Twilight, Moondancer, Smarty Pants, and of course Princess Celestia all returned to normal as they exited the large picture book. The book then folded of its own free will, closing its pages until next time.

Princess Celestia had to quickly summon up a handkerchief to use in order to wipe the tears from her eyes. She had been laughing and crying with delight so hard. "Oh, I say, that was truly a magnificent performance! You were very brave little foals to do all those scary circus acts."

"Did we make you proud, Mommy?" Twilight hopefully asked.

The sun princess nodded back. "You most certainly did, Twily. You and Moonie were simply fantastic!"

Moondancer beamed with pride. "Well, Hayscartes' method did most of the work for us. We just had to play along with the story. As long as we did that, we were fine," She then excitedly exclaimed. "I can't wait to try that with other books!"

"Ooh! Ooh!" Twilight bounced up and down as she got an idea. "We should do a book on the big potty, then we can see what happens when you go down the drain! That way we can satisfy our curiosity without getting hurt."

"No, no," Celestia playfully protested. "I'm sure you two don't really want to find out. And there are safer ways to get the answers."

Smarty Pants shuddered. "I would never want to go down the hole! It sounds scary! If that happens, it sounds like you could never come back! You'd disappear forever!"

The elder alicorn then changed the subject. "Now, we've all had a very exciting experience. And I think it's time for all good little ponies to take their naps. But first," She lit up her horn, levitating both Twilight and Moondancer towards her as she exclaimed in overly dramatic fashion. "I have two very stinky fillies who are in desperate need of a change! You two really did a number on your diapers, didn't you?"

"Huh? What do you mean?" Moondancer questioned, only to feel her diaper squish as she sniffed the air. To her surprise, the stench that greeted her nostrils wasn't as unpleasant as she thought it would be.

Twilight just looked ashamed. "Oh, I did it again, didn't I? I even promised I'd try to make it to the potty."

Moondancer couldn't help teasing. "Well, that's what you get for trying to act like the big pony you aren't. Besides, who needs the potty when you're already wearing your bathroom?"

Celestia just giggled in playfulness as she levitated the two dirty diaper ponies to the changing table, opting to change both of their very wet and messy diapers at once. "Now girls, there's no need to make a competition out of it. Everypony has accidents from time to time, even big ponies. What matters most is being honest about them so you can get changed."

Moondancer thoroughly enjoyed the rest of her day spent under Princess Celestia's loving care. She found it so easy to slip more and more into her "little" mindset as time went by. By the end of the day, she no longer cared about whether she used her diaper or not. In fact, using it seemed to become almost second nature to her, as if her years of potty training didn't matter at all.

Of course, the day couldn't last forever. And Moondancer was a little disappointed when it had to end. Now she had to go back to being her boring grown-up self, the pony who had grown-up not according to her own wishes but to the wishes of her parents and her big sister.

Well, maybe that could change with another trip to The Fountain of Youth in Manehattan. But that would have to wait for at least another day.

However, when the glasses wearing unicorn woke up the next morning and changed out of her diaper (she was equal parts relieved and disappointed that it was clean), she was surprised to see a scroll sitting near her nightstand. Attached to it was a note. She picked up the scroll and unfurled the note. It read as follows:

Dear Moondancer,

Thank you so much for agreeing to be Twily's playmate and helping her come out of her shell more. I really do want her to feel comfortable in her role, and anything that helps her do that is always appreciated.

Of course, I'm sure I don't need to tell you that you mustn't tell anypony about Twilight's secret without consulting me first. Only certain other ponies know about this, for good reason.

As a reward for your efforts, I've attached something that should interest you. Twilight told me just how fascinated you are with Hayscartes' method, and how hard you've been working to learn how to cast it. I hope this scroll from the Starswirl the Bearded section of the Canterlot Archives helps you out. Starswirl learned a lot from studying Hayscartes, after all.

Sincerely,

Princess Celestia

Moondancer could barely keep her horn from betraying her as she started trembling with excitement! Unfolding the scroll, she saw that indeed it contained detailed notes on Hayscartes' method and how to perform it. This was just the sort of help she needed.

Now if she could just find time in her schedule to fit in, along with her planned girls' night with Minuette, Twinkleshine, and Lemon Hearts. Not to mention her hopeful return to The Fountain of Youth (assuming the DJ there hadn't quit).

As the glasses wearing unicorn began making her plans, she was unaware until too late that her bladder needed to be emptied. Oh well, no big deal. Her diaper soaked up her "accident" just fine, and she had plenty of diapers to spare. She just used her horn to grab all the necessary changing supplies. And to occupy herself while the change was being done, she decided to grab a special magazine she had just begun reading. It was one that specifically catered to big foals like her.

Little did Moondancer know she was going to be in for a shock upon seeing a very familiar (to her) pony on the magazine's cover.

Professor Pampers (Cheerilee)

Author's Note

No tiebreaker was needed this time, Cheerilee had enough votes from previous rounds to edge out the competition. Scootabom1 proposed having Cheerilee be mentally regressed to all but babbling, and then playing pretend daycare/preschool. I decided to partially go with that idea, taking a page from the fic this is a continuation of. More specifically the Spike chapter where it was revealed at the end that Spike was only pretending to be mentally regressed.

There have been fewer and fewer votes in recent chapters, so I'm not sure how much longer I can keep this going if I don't get any more votes or ideas. I want to at least try to keep this fic going until either July or August of this year before wrapping it up. Whenever I do decide to end it, anyone will be free to pick up from where this might leave off. I've been specifically crafting something to give me an off ramp if needed.

But as long as I keep getting votes for eligible characters and get ideas to work with, I'll keep this fic going.

Characters previously voted on:
Lyra (with Bon Bon) - One and a half votes

Professor Pampers (Cheerilee)

"Good morning, Twily!" Princess Celestia cooed as she nudged her fellow alicorn awake, standing right beside the padded princess' bed with that big, motherly smile.

Twilight immediately reached out her hooves and hugged the sun princess, cooing back in a happy and playful tone. "Good morning, Mommy," She then used her horn to grab Smarty Pants, all the while asking the elder alicorn. "What are we going to do today?"

Celestia's smile grew brighter as she watched Twilight climb out of bed, proudly displaying that padded posture of hers. Even with how long it had been since they'd started this mother/daughter roleplaying, the warm and fuzzy feelings had never faded. It helped that Twilight always looked so cute in her diapers no matter what she did. She then said to the younger princess. "You'll see soon enough, Twily." Then she lit up her horn and pulled her fellow alicorn close.

A blush formed on the padded princess' face as she was subjected to an abrupt and unannounced diaper inspection. "I didn't have an accident, Mommy."

"I'm just making sure, Twily," Princess Celestia said with a knowing wink. "Foals don't always know when they go pee pee or poo poo. And what kind of mommy would I be if I let you get a rash?" She ended the diaper check a moment later, playful patting the padding. "Just as I thought, you're all nice and clean. Good job, Twily."

Twilight beamed with exaggerated pride. "I'm just doing my best to make you happy, Mommy."

The sun princess nodded. "You make me happy no matter what you do, Twily. Whether you use your diapers or the potty, I will always love you just for being you. And I mean that sincerely. Whatever makes you feel happy and safe makes me feel happy." It was possible to detect the faintest hint of worry creeping into her tone of voice, as if she feared that Twilight was perhaps becoming a little too attached.

The padded alicorn smiled back. "I know, Mommy. I know," Then she looked around the room, only for her eyes to notice no sign of anypony besides her and Princess Celestia. That prompted her to ask. "Where's my next playmate, Mommy? You've always brought one with you," She let out a gasp! "Wait a minute, are you going to be my playmate today, Mommy? Just like my other mommy was?"

Celestia snickered and snorted with a goofy grin plastered on her face. "Oh Twily, as much as I would love to join in on the fun with you, I can't. Who would I ever get to watch over you if I stopped being your mommy? The castle staff work hard enough as it is, I very well can't add foalcare to their list of already overwhelming responsibilities," Once she had regained her composure, she simply stated. "But I was able to find somepony willing to play with you. And don't worry, she's in diapers too. In fact, she's already waiting for you down at the dining room. Shall we go?"

Grasping Smarty Pants tightly between her hooves, Twilight gave a firm nod. And thus, with a flick of the horn from Princess Celestia, both alicorns were teleported away.

When Twilight and Princess Celestia arrived in the dining room a moment later, Twilight's eyes immediately fell upon a very familiar earth pony mare with a vivid reddish-pink coat sitting in one of the chairs at the table. She had pale, light grayish-pink locks, and her grayish-green eyes had that sort of far away look to them. And the cutie mark of three smiling flowers poking through the diaper left little doubt as to the mare's identity.

"Is that Cheerilee?!" Twilight let out a gasp! She was more surprised by how... infantile the earth pony seemed to be acting, given that she was pounding her hooves on the dining room table and appeared to be babbling incoherently. It was even possible to see a faint bit of drool coming out of her mouth.

Princess Celestia chuckled ever so softly, and put a hoof to her mouth to try to suppress the giggles. "No, Twily, that is Professor Pampers. That's what she insists on being called."

"Professor Pampers?" The padded princess blinked in surprise as she nevertheless made her way over to her new playmate.

When Cheerilee saw Twilight approach and heard the princess call her by her chosen nickname, the earth pony mare lifted a hoof up from the table and sat up absolutely straight. It was almost like she was coming out of a trance of some sort. "Yes, that's me," She giggled as she swished her tail. "I'm Professor Pampers! I have a PHD in diaperology!"

"Really?" Twilight blinked anew.

Cheerilee's giggles grew louder. "Of course not! Don't be silly! There's no such thing as diaperology! I just made that up because that's something a foal would say."

The padded alicorn was most surprised to hear Cheerilee talking normally, whereas a moment before she had been babbling and drooling.

The off-duty teacher seemed to sense what Twilight was thinking, for she explained. "I know what you must be thinking. I'm not mentally regressed. I still have my adult mind. But I'm trying my best to act more like a foal and less like an adult, hence why I'm calling myself Professor Pampers," She paused and poked at her padding with a hoof, delighting in how it crinkled and compressed. "I figured that if I'm going to teach classes on foalcare and on parenting, I should get some hooves on experience with the mindset of a foal. Studies have shown that it's very fascinating. And when Princess Celestia offered me a chance to study it personally... well, how could I refuse?"

"So you're just pretending to be a foal?" Smarty Pants suddenly spoke up.

Cheerilee nodded, greeting the stuffed animal. "Oh, hello there, Smarty Pants. I was wondering when Twily was gonna introduce me to you. And yes, I'm pretending to be a foal in both body and mind. I'm not very good at talking like a foal, though. So I'm mostly just going to babble and make noises. I'm here to learn, after all." Seconds after saying that, she went back to drooling and babbling, sounding rather convincing as she did so.

Princess Celestia came trotting over, explaining to Twilight. "I did offer her the chance to be mentally regressed, but she said it would be better if she stayed an adult and just pretended to be regressed. I know you'll teach her well, Twily. Just make sure you don't take advantage of that and get her into trouble," Her tone of voice took on a slightly sterner tone as she added. "Don't forget, I can punish you the way a mommy would if you act up."

Twilight shuddered, briefly remembering what had happened the last time she had experienced such punishment from the sun princess. The physical pain to her rump might have healed, but the memories still lingered in her mind. "I'll be good, Mommy," She firmly insisted. "And so will Smarty Pants. We won't do anything with Professor Pampers that we're not supposed to. Right, Smarty Pants?"

"Right, Twily," Smarty Pants replied. "We'll be the best behaved foals ever!"

The elder alicorn's smile returned as she clapped her hooves together in approval. "Good!" Then with a coo she declared. "So can I trust you to stay put and keep an eye on Professor Pampers while I fetch breakfast?"

Twilight firmly nodded. "Uh-huh." She proceeded to waddle over, sitting down in a seat next to Cheerilee and having Smarty Pants sit in the chair next to the alicorn.

Celestia, satisfied with the response, trotted out of the dining room and into the kitchen, soon disappearing from sight.

Now alone with Cheerilee, the padded princess watched as the earth pony mare pretending to be mentally regressed started putting a hoof into her mouth and sucking on it. Immediately, Twilight lit up her horn and pulled the hoof out, scolding her playmate. "Mommy says we're not allowed to suck on our hooves, especially not before eating. And Mommy is always right."

Cheerilee babbled and cooed, but seemed to understand what was being said. It was amazing how quickly she was getting "into character". It was almost as if she'd done it all before.

Princess Celestia returned a moment later, a tray of freshly baked pancakes being pulled along behind her with her magic. She proceeded to levitate over some bibs, fastening them around the necks of both big foals. Then she used her magic to put the pancakes onto two separate plates.

"Pancakes!" Cheerilee cheered as she raised her hooves into the air and licked her lips!

Twilight felt sorely tempted to reach out a hoof when one plate of pancakes was placed before her. The sweet smell sorely tempted her taste buds. It took all the willpower she had not to start drooling like Cheerilee was.

But Celestia pulled the plate away, as if sensing what Twilight was going to do. "Ah ah ah!" She playfully lectured. "You have to wait for Mommy to cut them up first." And that is exactly what she did: Using a fork and a knife to cut the pancakes into small, foal sized portions. They were full of syrup and warm butter that had been spread over them, which only made them seem even more irresistible.

As the padded princess waited patiently for the pancakes, she couldn't help but notice that next to Cheerilee's plate of pancakes was also a small bowl of oatmeal. That struck her as odd. Sensing that she would not get a straight answer from the earth pony mare, Twilight turned to Princess Celestia. But before she could ask a question, one of the cut up pieces of pancake was inserted into her mouth. The taste was so sweet that she forgot about everything else, and just concentrated on eating as many pieces of pancakes as were provided to her.

Cheerilee seemed to be much the same, content to let the sun princess feed her. Even so, she and Twilight both found that traces of syrup and pancake crumbs were getting all over their faces.

Princess Celestia wasn't bothered in the slightest by how messy her foals ate. She just waited until the last of the pancakes had been devoured, then levitated over a wet rag and started cleaning Twilight's face. "Those pancakes must've been really good if you made such a mess eating them." She playfully commented.

Twilight nodded back as her face was slowly cleaned. "Uh-huh. Pancakes are yummy!"

Meanwhile, Cheerilee seemed to get an idea. As she waited for her turn to have her face wiped clean, she reached out a hoof to grab her bowl of oatmeal. It had long since stopped being fresh and warm, but she didn't care. Instead of putting it into her mouth, the padded earth pony simply pulled back the seat of her diaper and poured the entire bowl's worth of oatmeal into her diaper. Then she leaned back in her chair and giggled as she squirmed about. "Heh heh, squishy!" And she pretended to gag, clearly intending for the oatmeal to be a substitute for something else.

Celestia playfully frowned when she witnessed the display. "Really, Professor Pampers? Did you have to do that now? Couldn't you have waited until we were done with breakfast?" She got up and trotted over, pretending to sniff the air. "Someone's a very stinky filly, it seems."

"Heh heh, stinky!" Cheerilee babbled and cooed as she wiggled about in her oatmeal filled diaper. Seconds later, she was levitated out of her chair as her diaper was pulled back for an inspection.

The sun princess kept up the act of treating Cheerilee's oatmeal prank as the equivalent of a messy diaper. "My goodness! You're almost as stinky as Twily! We'd better get you changed right away!" And she fanned a hoof across her nose in playful fashion.

Cheerilee, for her part, just cooed and clapped her hooves.

A small part of Twilight couldn't help but feel jealous when she watched the off-duty teacher be carried off by the sun princess. She looked down at her own diaper, noticing how pristine and clean it was. In that moment, something in her wished that she could've spilled something to make her diaper wet. Then she blinked in surprise at where that feeling had come from. "Why am I jealous?" She thought to herself. "It's all just an act, right? I'm not actually mad that Princess Celestia is treating Cheerilee as younger than me, right? She's always said I don't have to be the big filly if I don't want to be."

Unable to come up with a good answer, the padded princess just passed the time by turning her thoughts to other things: Wondering what sort of fun activities she and Cheerilee would have together after Cheerilee came back from having her "stinky" diaper changed.

Fortunately, Twilight didn't have long to wait. It hadn't even been five minutes before Princess Celestia returned, still carrying Cheerilee through the air even though the earth pony mare was now clad in a clearly spotless diaper. "Now what do you say to Twily for letting her borrow some of her diapers, Professor Pampers?" The alicorn mare with a majestic white coat asked as she set her charge down.

Cheerilee immediately looked Twilight in the eyes and in the best foalish sounding tone possible she said. "Thank you, Twily." Then she trotted over and gave her fellow padded pony a hug.

Celestia smiled and cooed with exaggerated praise. "Good job, Professor Pampers! It's always important to say thank you when somepony lets you borrow their things. And lucky for you, I always make sure to get the biggest, poofiest, most absorbent diapers possible for Twily."

Twilight blushed a bit. "I'm not that much of a stinker, am I, Mommy?"

The sun princess chuckled. "Maybe you are, just a little. But I'll love you no matter how stinky you are or how many of your stinky diapers I have to change. And I'm not just saying that because you sometimes use the potty."

"Thanks, Mommy," Twilight replied as she hugged her fellow alicorn tightly. "You're the best mommy ever! I mean it!"

"Mommy!" Cheerilee babbled as she eyed the taller alicorn mare. She seemed to be settling into her role very quickly and very easily.

Smarty Pants then questioned the alicorn mare with a majestic white coat. "So now that Twily and her playmate have had breakfast, what are we going to do next?"

"Something I think you'll agree is very fitting considering who Twily's playmate is." Celestia declared as she approached the padded mares, and teleported them away with her.

Upon returning to the bedroom that doubled as Twilight's secret nursery more or less, the padded alicorn was utterly astounded by the sight that greeted her eyes!

An entire corner of the room had been walled off by large guard rails, and the floor between the rails was covered with a soft, baby pink colored foam. Several cushions and pillows had been laid out in perfectly aligned rows, with some of them being sat upon by various stuffed animals. A small chalkboard of sorts was propped up against the wall, positioned so that it could be seen no matter how far away one sat. And just in front of the chalkboard was some kind of desk. To top it off, there were two unoccupied baby bouncers the same colors as the coats of both Twilight and Cheerilee, and they were set up right in front of the desk.

In short, it seemed that one corner of the bedroom had been turned into a classroom of some sort. The color of the baby bouncers left no doubt as to who their intended occupants could be. The only question left was who was going to be the "teacher"? It couldn't be Cheerilee. Or could it? Was Cheerilee going to give a pretend lecture about how to be a foal, and use Twilight as an example?

Princess Celestia quickly explained. "When I got Professor Pampers here," She briefly gestured to Cheerilee. "To be your next playmate, Twily, I started thinking: Since you're so smart, why not show it off? There are a lot of things you could demonstrate: You know your ABCs and how to count to ten. But then I started thinking about the things you don't know. And that got me to think that maybe you'd enjoy a day in class."

"So, Twily's going back to magic kindergarten?" Smarty Pants questioned.

At that, Twilight's pupils shrank and she gulped! "No! Not magic kindergarten!"

Celestia immediately moved to reassure the frightened alicorn. "It's not magic kindergarten, Twily. I know you don't have good memories of it. This is something more on your level: More like magic preschool."

The padded alicorn slowly came to her senses after hearing those words. "Oh thank goodness," And she pleaded. "Please don't ever make me go to magic kindergarten, Mommy! I'd rather stay with you."

The sun princess firmly vowed as she held tight to Twilight's hoof. "I promise, Twily. I'll never send you to magic kindergarten," She then calmly added. "You and Professor Pampers will be attending lessons for today."

"Yay! Preschool!" Cheerilee cheered again, before rushing over to the guard rails. But she stopped upon reaching them, rather than climb over them even though she could easily do so.

Twilight trotted over, eyeing her fellow padded pony. "What's wrong?" She asked.

Cheerilee babbled and promptly plopped down onto her poofy, padded posture. "Too high." She gestured to the guard rails, as if they were taller than they actually were.

The padded princess shook her head from side to side as she got an idea. "Nu-uh, not too high," She proceeded to try to lift the off-duty teacher from behind in order to boost her over the guard rails and into the classroom. "You can make it."

The diapered off-duty teacher, with help from Twilight, managed to clumsily straddle the guard rails. She landed on the classroom side as her diaper crinkled and compressed, cushioning the blow. From there, she scooted across the floor until she reached the bouncer with the same color as her coat. She managed to climb into it all by herself, taking great pride in her accomplishment! "Hooray!" She cheered, and started bouncing to her heart's content.

As for Twilight, she first boosted Smarty Pants over the guard rails, before climbing over them herself. She carefully levitated Smarty Pants into one of the empty seats immediately behind the baby bouncer. Then she waddled towards the baby bouncer reserved for her, and climbed into it. It felt so... surreal, even considering all the other things she had said and done as a foal. It really helped her to feel little.

Princess Celestia appeared at the desk near the chalkboard a moment later with a flick of her horn. She smiled, watching her charges bounce up and down repeatedly in their bouncers. They were clearly having the time of their lives, which is exactly what she wanted to see.

Even so, magic preschool was magic preschool. So the sun princess gently tapped a ruler against her desk, drawing the attention of all her "students". "Okay, everypony, please settle down," She spoke in her best teacher voice. "It's time for magic preschool to begin," Using her magic, she picked up a piece of chalk and wrote her name across the chalkboard. "I'm going to be your teacher: Miss Celestia. Now let me explain a few rules:" Beneath her name, she scribbled out a few numbers in chalk, then pointed to each one. "Rule number one: No disrupting the teacher while she's speaking. If you need to ask something, please raise your hoof."

Twilight and Cheerilee slowly ceased in their bouncing, eyes fixated on the alicorn with a majestic white coat.

Celestia continued, pointing to the second number. "Rule number two: Students are to remain in the classroom at all times, no exceptions. If you need to leave, you must ask a teacher to go with you," Then she pointed to the third and final number. "And finally, rule number three: Students must be on their best behavior while class is in session. Any student who disobeys will be sent to the time out corner." She gestured a hoof to a rather large stool at the opposite end of the makeshift classroom. True, there wasn't anything like a dunce cap or a paddle next to it. But the stool alone conjured up imagery intended to command obedience.

Satisfied with the lack of a response from her "students", the sun princess erased everything she had written on the chalkboard and cleared her throat. "Now then, let us begin today's lessons. We'll start with the alphabet, then numbers, and then colors," She proceeded to draw a large letter "A" on the chalkboard. "This is the letter A. It is the first letter of our alphabet, and the last letter in the word Equestria. A is for apple."

Slowly but surely, the elder alicorn guided both Twilight and Cheerilee through the alphabet letter by letter. She took the time to explain anything that might confuse her students. Then, at last, she reached the letter z, and drew a large "Z" on the chalkboard. "This is the letter Z, as in zebra. It is the last letter of our alphabet," After pausing for a moment, she proceeded to bring out some comically large alphabet blocks. "Now, here is a way to see if you all can remember what I've taught you," She levitated the blocks over to the big foals, and brought a small hourglass timer as she explained. "How many words can you make, and how many letters can you use before all the sand in this hourglass moves from the top half to the bottom half?"

Twilight felt confident in her abilities. But looking across to Cheerilee, she could see the diapered earth pony seemed more interested in stacking the blocks and building shapes with them rather than use them to spell words.

Looking back to Smarty Pants, Twilight seemed to get an idea in her head. After all, this wasn't really a contest. And it wouldn't be fair to take advantage of what she knew. If Cheerilee was having fun just the way she was, the padded princess decided she would join in.

"Are you ready?! Go!" Princess Celestia declared, and turned the timer over. Sand slowly began to pour from the top half into the bottom half. Then she stood by the chalkboard, ready to keep score.

Cheerilee quickly began arranging her blocks into a small tower, struggling to build it up at all before the uneven motion of her bouncing caused them to fall. Undeterred, she just picked them up and started building with them again, this time trying to make a small triangle with them.

As for Twilight, she was stacking blocks end to end with no rhyme or reason. She had no thought whatsoever as to what she should do with them.

The sun princess watched the infantile display from the big foals with that motherly smile of hers. "Cheerilee is learning a lot from Twilight. Or maybe it's the other way around," She thought to herself. "This is working out even better than I expected it to be. Maybe this is what Twilight's really needed, somepony on her level." Sure, there was still that lingering concern from the talk she'd had with Luna. It probably would never fully go away. But for now at least, it didn't seem to be a problem. And Luna had yet to say anything further about the state of Twilight's mental state.

At last, the final grains of sand reached the bottom of the hourglass timer. The "test" was over. Celestia took one look at the chalkboard, and found that neither Twilight or Cheerilee had managed to spell a single word with their blocks. She pretended to be disappointed as she shook her head. "Well, I guess we'll just have to come back to this lesson later." She declared and erased everything on the board again.

Cheerilee wasn't the least bit concerned about having failed the "lesson". She just kept stacking and re-stacking the blocks until they were taken away from her, at which point she occupied herself by using a free hoof to poke at her padding. She was in such a carefree state that she either didn't notice or didn't care that she was drooling again.

Twilight was only slightly better. She was silent, concentrating on using her magic to carefully position her alphabet blocks as best she could. Yet as she was in the middle of stacking them, hoping to build the biggest block tower yet, they were snatched away from her by the glow of Princess Celestia's horn.

"Alright, my little ponies," The alicorn mare with a majestic white coat declared. "That's enough for now. Playtime can wait. Now is the time for learning," Setting the blocks aside, she began drawing new symbols on the chalkboard. "Let's move on to numbers, shall we? Then we'll move on to colors, and then if there's time we'll come back to letters."

Just then, however, there came a knock at the bedroom door. It was all the way on the other side of the room, but it was still possible to hear the knock.

Princess Celestia seemed to briefly become worried if the look upon her face was any indication. But it faded just as quickly as it had appeared as she stood up and straightened her posture. "Better see what this is about," She then instructed to Twilight and Cheerilee. "Both of you stay here. I doubt you'd want anypony to see you like this. I'm sure this won't take long." She then teleported out of the classroom. After taking a moment to compose herself, she headed to the door to answer it.

Mere seconds after the sun princess had gone to the door, however, Twilight ceased in her bouncing as she felt a familiar twinge in her bladder. It was faint, but it wasn't going to stay that way for long. Her eyes drifted off into the distance, eyeing the bathroom. Just her luck that it was practically on the other end of the room, near the door. If she tried to make a break for it, she was sure to be spotted. She thought about trying to teleport to it. But then she hesitated as she remembered Princess Celestia's earlier instructions.

Cheerilee seemed to sense what the padded alicorn was thinking and feeling. For she ceased in her bouncing and leaned across to Twilight, asking her point blank. "What's wrong, Twily?"

Twilight bit her lip. "I... I have to..." She stammered as a single bead of sweat trickled down her face. The urge to go was strong. She'd never really paid it much attention before, but now it seemed intent on reminding her of its presence. "But Mommy told us we couldn't go anywhere without her. And if I try to teleport, somepony might see me. Somepony I don't want to see me in diapers."

The padded earth pony mare blinked slowly, before leaning closer and whispering to Twilight. "Well, actually, studies have shown that a diaper is more sanitary than the potty, provided the diaper is changed soon after being used. Plus, with diapers, you don't have to worry about stopping whatever you're doing. You just go when you have to go. I'm sure Mommy will understand."

Satisfied with the logic, Twilight took a deep breath and sighed. She leaned back in her bouncer, relaxed, and stopped trying to fight back. Her bladder soon relieved itself, as a steady hissing sound could be heard. Her diaper slowly but surely swelled up as a damp patch formed, growing bigger by the second. In a matter of seconds, it was all over. The damp patch slowly faded and dimmed as the diaper soaked up the accident no problem.

"There. Doesn't that feel better?" Cheerilee asked in a sympathetic tone of voice. "Your diaper handled the job no problem."

Princess Celestia reappeared in the classroom a moment later. "Alright, students," She declared in her best teacher voice. "Sorry that took so long. But I'm back, so now we can-"

But Twilight interrupted, raising a hoof. "-Mommy?"

"Yes, Twily?" Celestia asked, suspecting nothing.

The padded princess struggled to hold back the tears as she confessed. "I... had an accident. I tried not to, really, I did."

The sun princess quickly trotted over, inspecting Twilight's diaper and finding it rather soaked. She was quick to scoop Twilight into her hooves, lifting her out of the bouncer. "Oh, it's okay, Twily. If you have to go, you have to go. It's not healthy to hold it in. Come on, let's get you changed," Turning to Cheerilee, she said to the earth pony. "How about you, Professor Pampers? Do you need a change too?"

Cheerilee shook her head from side to side. "Nu-uh. I good." And she proudly presented her pristine padding to the princess. A close inspection revealed that it was indeed still spotless: No wet patches or bulges, no smelly smells.

Celestia made sure to pat the diapered earth pony mare on the forehead, showering her with exaggerated praise. "Good job, Professor Pampers! No wonder you have a PHD in diaperology! Maybe you could give Twily lessons sometimes." Then she levitated Twilight into the air, carrying her across the room to get changed.

Cheerilee watched the princesses from afar, smiling and admiring the bond they shared through their roles of mommy and daughter. It reminded her a lot of the love and affection her parents had shown her throughout her life. They had allowed her to enjoy her foalhood to the fullest extent: Weaning her off from bottles and breastfeeding, getting her out of diapers, and accomplishing all the major foalhood milestones at a reasonable age. She had been right in the middle of her peers on such issues, and even after discovering her love of teaching as a filly she had still found time for fun and games.

It was easy to see why someponies might like to return to a more carefree and innocent time. This experience was certainly giving the earth pony mare a lot to talk about when next she held a class on foals and on foalcare.

Celestia quickly changed Twilight's diaper, and then brought her back to the classroom. Much to her surprise, a hoof was raised by none other than Smarty Pants. "What is it, Smarty Pants?" She asked the doll (despite knowing who was really speaking through it).

"Could I join in the classroom too? I want to be with Twily and Professor Pampers, and go to school." Smarty Pants pleaded.

The sun princess smiled and nodded. "Of course you can join, Smarty Pants. There's always room for more. Thank you for asking the right way," She then cleared her throat, drawing the attention of her other students. "Class, we have a new student joining us," Using her magic, she brought forth the old doll and said. "This is Smarty Pants. She's here to learn just like the rest of us," Then she encouraged. "Say hello, Smarty Pants."

"Hello, everypony." Smarty Pants sheepishly greeted.

Twilight giggled and waved a hoof. "Hi, Smarty Pants! I'm glad you're here. Things are always more fun with you around."

Cheerilee also giggled, watching as Smarty Pants was placed at an empty desk to the right of Twilight's bouncer.

Princess Celestia waited for a moment, before clearing her throat again. "Now then, everypony, let's get back to today's lesson. Shall we?"

The rest of the day was a fun filled blur to Cheerilee, even to the point where she had an actual accident in which she messed herself. It had only partially been intentional to see what it felt like, and the smell alone was enough to make her regard it as something she would never do again no matter what.

When at last the day ended and Twilight went to bed for the night, Cheerilee was sad to see it all end. Even so, she was glad to get out of diapers.

Next morning, Cheerilee slept later than usual. She'd accumuliated so much earned time off that nopony, least of all the EEA, had batted an eye when the earth pony mare had decided to use some of it. She still had at least today off, which gave her a chance to reflect on everything that had happened.

Next time, perhaps she would take up Princess Celestia's request to be fully mentally regressed, instead of merely trying to act like it.

When at least Cheerilee did wake up, she was surprised to discover a letter addressed to her sitting on a desk near her bed. Being naturally quite curious, she picked it up and examined it. The letter read as follows:

Dear Cheerilee,

I probably don't need to do this, but I want to thank you again for agreeing to be Twilight's playmate. And I know I can trust you to keep this a secret from ponies who aren't in the know.

From one teacher to another, I have nothing but respect for the sense of loyalty and affection you inspire in your students. And I see a similar bond reflected between Twilight and myself since we've started these mother/daughter playtime sessions.

I know I don't need to reward you, especially not since you've still got a lot of saved days off ready for use in any emergency. Even so, I hope you'll at least consider the offer to be a guest teacher at my school someday. You strike me as an excellent pony to help teach about earth pony magic and cutie mark magic to ponies who aren't familiar with such subjects.

Sincerely,

Princess Celestia

At that, the earth pony mare felt her heart figuratively skip a beat. Being invited to teach at a prestigious school like Celestia's School for Gifted Unicorns would be a very high honor indeed.

Well, that offer would have to wait a while. Right now, Cheerilee wanted to make use of her newfound insights into foals and foalcare while the experience was still fresh in her mind. "I wonder if maybe I should lean into my Professor Pampers persona for such classes," She thought to herself. "After all, ponies always learn best through direct experience. And many of the ponies who most need a lesson in foals and foalcare are a lot older than my usual students."

Little Lyra and Special Agent Sweetie Drops (Lyra and Bon Bon)

Author's Note

Lyra and Bon Bon had votes from previous rounds, and with one more half vote due to them being mentioned again in the last round of voting, they won out.

Scootabom1 once again was the first to propose what to do with them, suggesting that Lyra allow herself to be mentally regressed, as well as Twilight building a pillow fort with Bon Bon, and Lyra getting finger gloves as a reward. And Tiber Septim II proposed the idea of Lyra and Bon Bon both telling Twilight a sad story, which would make them and her cry, and Princess Celestia would comfort them.

I did also draw on inspiration from Lyra's prompt from "Potty Training Tales", which itself built off the Monndancer prompt (Lyra's prompt can be found here for those interested). And the name of Bon Bon's secret organization comes from the chapter book "Lyra and Bon Bon and the Mares from S.M.I.L.E.".

As always, you can vote for any characters who are not ineligiable due to the rules and restrictions. If a character has already been done before, you can vote for them again but only if they're appearing with at least one other character. And if this fic continues long enough for repeats to appear, characters who appear a second time will be permanently ineligable unless otherwise noted.

On the subject of Equestria Girls characters, as of right now only Sunset Shimmer and the Dazzlings will be allowed, again due to the nature of this fic and the fact that many of the human counterparts to ponies would be considered minors, and I don't want to risk any issues of potentially using characters under the legal age of consent.

Characters previously voted on:
Coco Pommel - One vote
Spike and Shining Armor (Together) - One vote
Limestone Pie, Marble Pie, Sassy Saddles, Fleur - One half vote

Little Lyra and Special Agent Sweetie Drops (Lyra and Bon Bon)

Princess Celestia didn't know whether to laugh or to groan at Twilight's antics this time. She had decided to give the padded alicorn a bath. Just a regular bath, mind you, not a bubble bath.

But Twilight apparently didn't think she needed a bath, and had tried to run away. It was of course futile, she was quite easily pulled towards the bathroom and the bathtub by the sun princess. But she was still squirming and rebelling. "I don't wanna take a bath, Mommy!"

"But Twily, don't you want to get all nice and squeaky clean?" The sun princess cooed. "You haven't had a bath for days now. Just imagine how filthy you must be. You're starting to smell worse than one of your dirty diapers. And that's saying something."

Twilight frowned. "I'm not that stinky, Mommy." Despite her protests, her diaper was removed and she was plopped into the tub with an audible splash.

Celestia, undeterred, just set to work scrubbing her fellow alicorn until she was clean and smelling nice again. Then, after pulling the plug and letting all the water in the tub drain out, she lifted Twilight out and placed her onto some towels, then used her magic to dry the alicorn before putting her diaper back on. The whole process had taken only a few minutes at most. "There we are. Now was that worth making such a fuss, Twily? I don't think so."

The padded alicorn sighed, waddling out of the bathroom and grabbing Smarty Pants. "Hey, Smarty Pants. Thanks for waiting for me while Mommy made me take a bath. It wasn't even a bubble bath."

"Oh, but Twily, you used to love bath time," Smarty Pants cooed in encouragement. "It was your favorite time of day. Besides potty time, of course. That was the only time you could read as much as you want without anypony ever asking you to do anything else."

Twilight nodded and nuzzled the stuffed donkey. "And you were always by my side no matter what, Smarty Pants. Now that I think about it, you were the first friend I ever had," She then cooed. "I think everypony should have a friend like you once in their lives. Maybe I should pass a decree or something."

Smarty Pants giggled. "While you're still in diapers, Twily? What would everypony think? They'd start calling you the princess of pampers."

At that the padded alicorn blushed bright red with embarrassment. "S-so, even princesses wear padding sometimes."

Princess Celestia chuckled. "Well, you know what all the papers would say if they found out about your secret," She gave a knowing wink. "I've had my fair share of embarrassing press stories over the years," Then she coughed into a hoof and changed the subject. "But we can discuss that some other time, Twily. For now, you're not just a princess, you're my little princess. And because my little princess has been so good lately, I think it's time for her reward."

Twilight's ears perked up, realizing what her fellow alicorn meant. "So who's my playmate this time, Mommy? Is it somepony I already know, or is it a total stranger?"

The alicorn mare with a majestic white coat replied by lighting up her horn while looking back to the bedroom door. "It's both, actually. And they should be here right about... now!" After she'd finished speaking, the door opened up, and out tumbled two ponies in diapers as thick and as large as the ones Twilight always wore. One of them was a unicorn mare with a sea green coat, and the other was an earth pony mare with a cream colored coat. Strangely enough, both appeared to be wearing black stealth suits and sunglasses.

The earth pony mare stood up, grumbling. "Looks like our mission is a bust, Lyra. We've been captured."

"Lyra", for her part, just giggled as she poked at her diaper. "Hehe, poofy!" It was even possible to see a little bit of drool escape her lips and dribble down her chin.

Twilight's eyes went wide! For the first time since Vinyl Scratch and Octavia, she had two playmates! And unlike them, she recognized one of the ponies. The unicorn was none other than Lyra Heartstrings, one of Twilight's old Canterlot friends, and one who had subsequently moved to Ponyville (years before Twilight did the same). She turned to Princess Celestia, hugging the older alicorn as she exclaimed! "Thank you so much, Mommy! Two playmates means twice as much fun!"

The cream colored earth pony mare seemed to grumble a bit as she turned to the sun princess. "So that's it! This was all a set up! I knew something was up when you asked us to 'volunteer' for an 'assignment'. I thought we were just supposed to sneak into the castle, and the diapers were just so we wouldn't have to take bathroom breaks," She then remarked. "Is this because of that bugbear incident all those years ago? I thought we'd moved past that when you reinstated S.M.I.L.E."

Twilight blinked in surprise. "'S.M.I.L.E.'? She had never heard of such a term before."

The earth pony mare removed her sunglasses, quickly scanning the room. After she was certain the coast was clear, she waddled towards the padded princess and explained. "It stands for: Secret Monster Intelligence League of Equestria. And our existence is supposed to be top secret. It was so secret, I had even to operate under the name of Bon Bon, rather than Sweetie Drops," She somewhat sheepishly confessed. "But I kind of like Bon Bon better. It's because of that name and the persona I adopted that I was able to meet my best friend and special somepony: Lyra Heartstrings."

Lyra smiled and waved a hoof. "Hi." She spoke in a noticeably foalish sounding tone of voice.

Twilight looked at Lyra, noticing the far away glance reflected in the unicorn's eyes. She then turned to Bon Bon and hesitantly asked her. "Is Lyra okay? She seems kind of out of it."

Bon Bon sighed as she looked to Princess Celestia. "Lyra's fine. She specifically asked Princess Celestia to turn her mindset into that of a foal. When Princess Celestia approached us in secret, she said she had a special job for us, a top secret one at that. But all she told us was that we had to put on diapers and infiltrate the castle. And once diapers came into it, Lyra made the request to be mentally regressed. She has the mindset of a two year old, maybe a three year old."

Smarty Pants giggled. "Lyra is so silly!"

Bon Bon blushed. "Honestly, I hope she doesn't remember anything about this. This is so embarrassing and humiliating. Not only did we get caught by the same princess who wanted us to sneak into her castle, but now I'm starting to see what the real reason was," Then she turned to Smarty Pants. "By the way, I seem to remember that the last time I saw you, Twilight had enchanted you to make everypony fight over you."

Twilight looked down at the ground in shame and whimpered, trying to hide behind Smarty Pants as the doll explained. "Well, Twily didn't mean for things to get that out of control. As for me, Big Macintosh apparently loved me even without the spell. He took me home, and I had to spend the next year and a half with him. Usually, that meant being Winona's favorite chew toy. It was very lucky for me that Big Mac knew how to fix me up every time. Never knew he was so skilled with a needle. Then, when Twily became an alicorn, Big Mac dropped by and gave me back to her, even apologized and said he never meant to hold onto me for so long."

The earth pony mare just replied in a low sounding tone of voice. "Well, if you or Twilight ever do anything like that to me again, I'll make you regret it. I was S.M.I.L.E.'s top agent for a reason, I learned a lot of things that I could put to very good use if given the right incentive."

The alicorn princess eeped. "P-please, don't hurt me! I'm so sorry!"

Bon Bon giggled, flashing a knowing wink. "Relax, I was only kidding. At S.M.I.L.E., we only dealt with reconnaissance and capture. We operated entirely in the background, often going deep undercover. And lucky for me," She turned to Lyra with a smile. "They were willing to make an exception to let me stay with Lyra and bring her into the agency when it was re-established. The alternative would've been to erase all of Lyra's memories of me. And I'd sooner die than let that happen! Lyra is the pony who found a way to pierce my defenses, bring out the best in me. That's why we're officially a couple now," A slight chuckle escaped her lips. "Even if she's currently back in diapers."

Twilight giggled. "Well duh! Mommy wanted you two to be my new playmates. And this time she wanted it to be a surprise."

Princess Celestia replied in an innocent sounding tone of voice. "Come now, Twily. You make it sound like it was a devious ploy on my part. It really wasn't. Besides, even I don't know why Lyra chose to have me mentally regress her. I know she was one of your classmates when you were attending my school, but that's the most I know about her. If anything, I would've thought Bon Bon would be the one asking me to regress her, she once told me that she's been in S.M.I.L.E. her whole life. And her parents were too, apparently."

Bon Bon nodded. "It's true. And apparently, my parents aren't the only S.M.I.L.E. agents who had kids. I can't name names, you understand, but let's just say that I don't think they fully realized how much of an 'adventure' it would be to have and raise a foal. From what I've seen though, the kid's doing pretty well for herself. Her parents are at least smart enough to have trusted ponies keeping an eye on her whenever they're out of town."

Lyra, meanwhile, was just giggling as she plopped onto her padded rump and poked at it some more. She began sitting in that pose she was so famous for sitting in: Upright, with her front hooves folded to either side and her back hooves spread out in equal measure. She seemed to be enjoying herself, not having a care in the world.

Celestia then commented. "Well Special Agent Sweetie Drops..."

"Please just call me Bon Bon. I'd prefer not to mix my S.M.I.L.E. work with this." Bon Bon insisted.

"Oh, but you could easily spin this as undercover work," The sun princess said with a knowing wink. "Think of it as getting into character, just like all that background work you were so good at."

The earth pony secret agent just shrugged, fully removing her sunglasses and wiggling out of her black stealth suit. Then she helped Lyra do the same, the unicorn mare not putting up a fight as Bon Bon did so. It seemed that even with her mind regressed, a part of her still had that connection and that trust with her special somepony.

Once both Bon Bon and Lyra had more or less changed out of their secret agent attire and had stripped down to just wearing their thick diapers, they waddled over to Twilight and Smarty Pants. Bon Bon then asked the padded princess. "So, what do you wanna do, Twily? That's what I'm supposed to call you now, right?"

Twilight nodded. "Uh-huh. I'm Twily, and Princess Celestia is my mommy."

"Mommy!" Lyra cooed as she gazed at Celestia.

Princess Celestia was quick with the reply. "You can call me mommy if you wish. Do whatever makes you feel comfortable. All I ask is that you're nice to Twily and to Smarty Pants."

Smarty Pants replied. "Yeah, don't play too roughly with me or anything. I can take a lot, but I'm not invincible. And if you want to do something with me, you have to ask Twily first because she and I are inseparable. We've been together since she was in diapers."

"But isn't she still in diapers now?" Bon Bon questioned with a quirked brow.

Twilight gave a foalish giggle, clapping her hooves together as she was all too happy to explain. "Duh, she meant when I was in diapers the first time, when I was an actual foal instead of a big foal. Smarty Pants was a present from my parents on my first birthday. And she's never left my side since! Well, aside from that one time, but you know what I meant!" She hugged the doll tightly! "Smarty Pants gave me the confidence to take on the world I never could've found otherwise. She was always there for me no matter what: Whether I was a good little pony or not. And she never complained that I was too noisy, or too stinky, or anything like that."

Bon Bon nodded and smiled. "I see. You two are a lot closer than I would've imagined from that little 'incident' in Ponyville. Then again, I'm not a unicorn like you were or like Lyra is, so who knows if I would've ever thought of enchanting one of my old dolls."

Lyra pointed a hoof to her forehead as she stood up. "Magic," She loudly proclaimed, only to lose her balance and fall down. She landed right on her padded posture and proclaimed. "Oopsie! Go boom boom!"

The earth pony mare let out a sigh of regret upon watching the display. "Look at her. She doesn't have a care in the world. And she makes it all look so easy," She turned to herself. "I'm still trying to get used to moving around in these diapers. I know they're meant for big foals like Lyra and I, but do they have to be nearly this big?" She demonstrated this fact by spreading her legs apart as best she could, revealing just how much more space the padding seemed to create.

Lyra giggled again as she stood up, waddling over and nuzzling Bon Bon. "Bon Bon nice."

"You always say that, Lyra," Bon Bon sweetly replied and nuzzled her special somepony. "But I wouldn't have it any other way."

Smarty Pants, meanwhile, was questioning something she seemed to have noticed about Lyra. "Hey, Lyra," She called to the unicorn. "I know your mind's been altered, but how come you're not talking so much compared to Bon Bon? When Twily was two years old, she was quite a chatty foal. She loved to talk about anything, especially if she read something interesting."

Twilight puffed out her chest. "Uh-huh. I was even able to read grown-up books, that's how smart I was. Though I... did need a little help making out some of the bigger words," Turning to Lyra, she said to the unicorn. "Still, I do seem to remember that you could talk just fine when you were two years old. Moondancer and I were well aware of that, especially once we found out you were actually slightly older than us. In fact, I think you were the oldest out of everypony in our group," She blushed. "I think I was the youngest, just barely."

Lyra was silent for a moment, maybe two. She seemed to be deep in thought (which must've been hard given her mentally regressed state). Then she opened her mouth, seemingly ready to explain herself. Before that could happen, however, she suddenly seemed to recognize some kind of urge inside of herself. She raced off towards the bathroom while shouting! "Potty!"

"Lyra, wait!" Bon Bon frantically called out to the regressed unicorn!

Lyra, however, refused to wait! "Gotta go! Gotta go! Gotta go!" She said over and over again, hopping back and forth from one back hoof to another as she made her way into the bathroom and approached the toilet. Somehow, the unicorn mare was able to lift up the lid of the toilet, pull down her diaper, and scramble onto the toilet seat. Within seconds of doing so, it was possible for everypony to hear a steady tinkling sound echoing into the toilet bowl below.

Twilight was utterly speechless at the display! It shouldn't have been possible for Lyra to do all of that all by herself while mentally regressed. But apparently, some instincts couldn't be suppressed by magic. And apparently for Lyra, her potty training was one of them.

Soon, the mentally regressed unicorn mare was finished. She graciously grabbed a few toilet paper rolls to wipe herself clean, then flushed the toilet and jumped down. Using her magic, she pulled her diaper back up and then waddled to the sink to wash her hooves.

The padded alicorn felt something stir up deep inside of her. Something she thought had been taken out of her long ago as a result of what had happened at her third birthday party. But somehow, some way, it had come back. She wasn't about to be outdone by one of her peers, mentally regressed or not. She was determined to prove she was just as capable of being a big pony. So she trotted past Lyra and made her way to the toilet, determined to try her luck with the almighty porcelain throne.

"Twily?" Princess Celestia called as she witnessed the odd behavior from the padded alicorn.

"Not now, Mommy, I'm going potty!" Twilight huffed as she climbed onto the toilet seat and sat down, swishing her tail in the process. Then she sat there, and sat, and sat, and sat some more. Minutes seemed to tick by with nothing happening. But at last, the padded princess sighed as her bladder finally began to empty itself. Except, something was wrong. There was no sound of anything tinkling or hissing, nothing seemed to be echoing into the toilet bowl. A horrifying realization struck the padded alicorn as she looked down at herself, only to realize too late that she had forgotten all about taking off her diaper!

So it was that Twilight ended up peeing into her diaper instead of the toilet, much to her embarrassment and shame. She couldn't stop herself from sniffling as she sat there, even long after her bladder had emptied itself fully.

Princess Celestia trotted into the bathroom a short time later, quickly reaching out a hoof to comfort her fellow alicorn. "Twily, it's okay. Accidents happen."

"But... but... but I wanted to be a big pony, like Lyra." Twilight sniffled and softly sobbed as she sat there in her soggy diaper.

The sun princess gently reassured Twilight as she lifted her off the toilet and put the lid down. "And you still can be. There's always next time. One accident doesn't mean you're not ready for the potty any more than one successful trip to the potty means you're ready to get out of diapers, regardless of whether it's a number one or a number two thing," She carried the padded princess out of the bathroom, and used her magic to gently float Twilight onto the changing table. "Now just relax. We'll get you changed into a fresh diaper in no time. Then you'll feel much better."

And indeed, Princess Celestia was right. When Twilight's rump was wiped and powdered, and then strapped up into a new diaper, her overall mood seemed to improve. Now her little mishap didn't seem like such a big deal after all. Not with her mommy there to comfort her and reassure her that everything was okay.

Lyra immediately waddled over to Twilight when she was set back down again. And the unicorn mare with a sea green coat apologized sincerely. "Sorry you had your accident, Twily. I no mean to make you feel bad. I just not want to use my diaper, that's all."

Twilight hugged the padded unicorn. "I should've known about that. Even when Moondancer and I were swept up in that silly competition of ours about who was more of a big girl, you never cared. You even still wore diapers until Moondancer and I both graduated to pull-ups. And you were totally okay with us getting out of those before you."

Lyra nodded. "Uh-huh. Potty training not supposed to be a contest. Mommy and Daddy say it not matter how long I take to get it right, and that there other ways to prove I big pony."

Bon Bon smiled as she looked to her special somepony. "You're always so forgiving, Lyra. You gave me a second chance that I thought for sure I didn't deserve. You truly are a one of a kind pony."

The padded unicorn then waddled over to Bon Bon, hugging her tightly. "Lyra love you, Bon Bon, always! Bon Bon first friend Lyra made in Ponyville that not care about Lyra's research and fascination."

Smarty Pants couldn't help but giggle. "Oh, so that way of sitting isn't just for show? Everypony always talks about your obsession with those other creatures that nopony's ever seen before."

"Smarty Pants!" Twilight shushed the doll. "It's not nice to make fun of other ponies for what they like or what they do!" She then secretly whispered. "Besides, you know those creatures are real. But I can't tell them about the mirror portal, it's supposed to stay a secret."

"Oh, right." Smarty Pants realized and quickly clammed up.

The padded alicorn then quickly sought to change the subject, knowing that Bon Bon was sure to press for more details (and probably Lyra too) if they knew what she knew. "So, anyway," She turned her attention once more to the earth pony mare. "Bon Bon, do you have any idea why Lyra chose to let Mommy regress her? Sounds like Lyra had a pretty normal foalgood. Her parents didn't pressure her the way some other Canterlot parents did. At least, from what little I remember of them."

Bon Bon shrugged her hooves. "Your guess is as good as mine, Twily. From what I can gather, Lyra was always something of a role model for ponies her age. She would always tell me how growing up she was frequently overhearing grown-ups praise her and telling their foals to be more like her. It wasn't just in potty training, either. Apparently, almost everything she did as a foal was something other foals should strive to be like: Walking, talking, you name it. And I guess she was just tired of all the attention, it made her feel like her foalhood was being controlled or dictated by others, even when it wasn't."

"Oh my gosh! That's awful!" Smarty Pants exclaimed! "Nopony should feel like their foalhood is decided for them by a bunch of poopy heads."

The earth pony mare just continued. "Yeah, well at least her foalhood was spent in one place where she could grow up with friends that didn't care what she was like. I can see how she might want to return to that time, to a time when ponies talked about her for good reasons and not for silly reasons. I know there's so much more to her than all her research. She trusted me with her secret, even when I was still keeping a secret from her."

Smarty Pants quickly deduced what Bon Bon was talking about. "You mean the whole 'Sweetie Drops' and 'S.M.I.L.E.' thing?"

Bon Bon gave a confirming nod, and let out a sad sigh. "Unfortunately, yes. There were so many times I wanted to tell her," Her lips quivered. "But every time I started to work up the nerve, I thought about how she'd react and what would happen if S.M.I.L.E. ever got re-established. I should've known I couldn't run from my problems forever, even if that's all I wanted to do."

"I remember Twily was really scared of the potty for a while after she flushed herself down it while trying to find out how it worked," Smarty Pants commented in reply. "And since I wasn't there for Twily when it happened, that just made it worse. I couldn't reassure her that she'd be okay. That's why I started singing to her once she was old enough for potty training. That way I could calm her down. I was so glad when it worked and Twily overcame her fear. It was like it never happened."

Twilight then chimed in. "And look at how well things worked out for you and Lyra, Bon Bon. You're still together despite everything. Lyra's told me and her old Canterlot friends how much she loves being around you now, whether you're working for S.M.I.L.E. or not. It reminds me a lot of the bond I have with my friends."

The earth pony mare with purple and pink locks smiled ever so faintly. "I'm flattered you think that way, Twily. Honestly, being in diapers again," She looked down at her own padding. "It's made me realize just how much I missed out on as an actual foal," Looking back up, she explained. "I already told you that my parents were S.M.I.L.E. agents when they had me, and that I was part of S.M.I.L.E. for as long as I can remember. But you don't know what that really meant. That meant my parents and I were constantly on the move, traveling from city to city and town to town. And it was always on short notice too."

Twilight and Smarty Pants exchanged mutual gasps of shock! And their gasps seemed to draw in Lyra, who waddled close and gasped too!

Bon Bon, undeterred, went on talking as she drew upon memories that had been locked away, waiting for the right moment and the right conversation to burst out into the open. "My oldest memories were of the traveling. We never stayed in any location for more than a year at most. It was at its worst when I was two and three. My parents were moving every other month it seemed, tracking down an elusive monster that had to be captured before it could pose a danger to anypony."

"Do you know what it was?" Smarty Pants asked the currently off-duty S.M.I.L.E. agent.

The earth pony mare with a cream colored coat put a hoof to her chin, trying to recall. "I think I overheard something about it being a cockatrice, or maybe a chimera. Whatever it is, it took nearly two years to be captured and sent to Tartarus. And while all that was happening, I was supposed to be in potty training," A frown formed on her face. "My parents only just started it when we moved for the first time. As you can probably imagine, with all the chaos going on in their lives as S.M.I.L.E. agents, things like potty training slipped through the cracks. It wasn't long before I started lagging behind my peers. But if I stayed in diapers for too long, ponies would start to get suspicious. So I had to learn as much as I could whenever I found the time, my parents didn't get to train me the way they wanted to. And I had to grow up before I truly felt like I was ready."

Twilight found herself unable to keep from tearing up. "That's so sad. It's like your foalhood ended in the blink of an eye, and you never got to say goodbye to it," Soon, she started crying, hugging the earth pony mare tightly. "Oh Bon Bon! If anypony should have a reason to go back to diapers, you'd be right at the top of the list!"

"There there, Twily," Smarty Pants tried to comfort the crying alicorn. "It doesn't sound like she's that upset about it."

Yet within seconds, Bon Bon was starting to cry too. And try as she might, she couldn't bring herself to stop. "It's not fair! Why did I have to give up my diapers so soon just so ponies wouldn't get suspicious?! Why couldn't I be allowed to grow up at my own pace and on my own terms?! Why did S.M.I.L.E. always have to take so much away from me?! It almost cost me my one true chance at happiness, to be with the pony I love the most!"

Even Lyra was crying and sobbing. "Bon Bon, your story make me so sad!" She replied in a foalish sounding lisp. "You no get to enjoy foalhood like I did."

"I guess that's one thing we have in common," Bon Bon admitted in between sobs. "We both have issues stemming from our past, and they all stretch back to when we were foals. If only we could've met then, we could've run away together and lived our foalhoods the way we wanted to."

Princess Celestia quickly came trotting over, moving to calm down the trio of crying foals. She lifted them all into the air with her magic and spoke softly to them. "It's okay to cry sometimes, my little ponies. Keeping your emotions bottled up inside you all the time isn't healthy. It's just like when you try to hold it in when you know you have to go potty. You can't hold it in forever, it has to come out sooner or later. And often, holding it in makes it worse than if you just let it all out. The same thing is true for your emotions."

Twilight seemed to nod quite slowly, nuzzling into Celestia's embrace. "You're so smart, Mommy. You know everything."

"Not everything, Twily," The sun princess replied with a sweet smile. "But when you've lived as long as I have, you tend to learn a lot. Besides, what kind of mommy would I be if I didn't know how to comfort my foals and cheer them up?"

Bon Bon blushed as she slowly ceased in her crying. "I'm so ashamed I did that. Especially in front of you, princess."

The older alicorn just waved a hoof. "Oh, you have nothing to be ashamed of, silly," She booped Bon Bon's nose with a hoof. "You're just a foal now. And crying is part of your character. Crying is how foals like you let Mommy know that something is wrong. Besides, don't you feel better now that you've gotten all that stuff off your chest?"

The earth pony mare paused, thinking over such logic. She was so used to masking her emotions as part of her cover. The idea of not doing so had seemed foreign to her until now. She had never given any thought to a "role" where expressing her emotions, whether real or exaggerated, was a good thing. But as she could clearly see with both Lyra and Twilight, they had no trouble doing it. Heck, Twilight was so taken up with the role that she'd not only given herself a nickname but also made her stuffed animal "talk".

Rather than set the now calmed big foals back down, however, the alicorn mare with a majestic white coat instead levitated them close to her teets. "Seeing as you're already so close to me as it is, I think now would be a good time for you all to get your nutrition," And she encouraged. "Go ahead, drink up."

Twilight happily latched onto one nipple and started suckling, closing her eyes as she timed her suckles to the rhythm of Princess Celestia's heartbeat.

With a cry of "Milkies!", Lyra did the same on her end. But she opted to keep her eyes open, and suckled much faster.

"Careful now, don't drink too fast," Celestia cautioned. "And save some for Bon Bon. I only have so much milk to go around, you know."

But instead, Twilight opened her eyes and removed her lips from the nipple she'd been suckling on, then said. "It's okay, I'm done. Bon Bon can take my place."

Bon Bon was understandably hesitant to drink breast milk, especially directly from its source. So she closed her eyes, trying to imagine she was a little pony again and being breast fed by her mother (one of the few memories from her foalhood not directly associated with S.M.I.L.E.). After a good deal of effort on her end, she was rewarded with the almost overwhelming taste of sweet, creamy milk.

The breastfeeding ended sooner than the earth pony would've liked, however. And she opened her eyes again in time to see her be set down next to Twilight and Lyra. "Alright, my little ponies," She declared. "What would you like to do now?"

Bon Bon looked around the room again. This time, she wasn't scanning for any sign of possible ponies listening in or otherwise observing her. She felt safe and secure in here with just Lyra, Twilight, and Princess Celestia. So she was instead taking in her surroundings more in depth. As she did so, an idea came into her mind. "I know," She proposed as she rushed to the bed and grabbed a pillow. "We could build a pillow fort! Lyra told me she used to make those all the time at slumber parties."

"Yay, pillow fight!" Lyra cheered and waddled over to join Bon Bon.

Twilight seemed to be satisfied with the idea too, turning to Smarty Pants as she asked. "Whaddya say, Smarty Pants? Wanna help build the fort?"

"Of course, Twily, you didn't even have to ask," Smarty Pants replied. "Since when have I ever refused to do something with you?"

"Never, that's when!" Twilight playfully giggled, kicking about in her pampers as she did so. She soon rushed over to the bed, grabbing a pillow as well.

Princess Celestia, for her part, smiled and clapped her hooves in approval. "A pillow fort sounds like an absolutely wonderful idea. But you'll need a lot more pillows if you're going to build a fort out of them," She quickly instructed to her charges. "Wait here, I'll go fetch some more pillows for you." And after lighting up her horn, she disappeared in a flash.

Undeterred by their "mommy"'s absence, the three big foals (and Smarty Pants) just took what pillows they could get from the alicorn sized bed and dragged them across the room. "Where should we set up the fort?" Smarty Pants asked Bon Bon.

Bon Bon shrugged her hooves. "I don't know. You and Twily know this place better than I do. Where do you think a good place would be to start building our fort?"

"I know!" Twilight exclaimed as an idea came to her! "We'll build it right across from the door! Then if anypony unexpected comes into the room, we can attack them!"

Lyra happily cheered! "Yay! Pillow fight!"

Bon Bon grinned. "I was hoping you'd say that, Lyra. But I'll have you know, I'm a pillow fighting champion. Don't think you can beat me just because you went to more sleepovers."

So Twilight, Lyra, and Bon Bon brought the few large pillows they'd managed to get their hooves on over to the other end of the room, facing towards the bedroom door. It didn't matter to them that the pillows they had on hoof were obviously not enough to construct a fort of any sort. They were just happy to start building it.

Princess Celestia teleported back into the room about a moment or so later, and in her magic she held what looked like a bag of very large pillows, all in colorful patterns and prints. She set the bag down next to the adult foals. "Here you are. These should be more than enough to construct a nice pillow fort. And you can use any spare ones for ammunition."

The earth pony mare let out a gasp! "You knew what we were planning to do?!"

Celestia replied with an innocent smile. "No, but I had a hunch you wouldn't be satisfied with just a fort. It must always have something to use to help defend it, after all."

Twilight and Bon Bon thus worked together for a while to build a pillow fort that occupied nearly an entire corner of the bedroom. Lyra and Smarty Pants helped a little, mostly with dragging pillows over for the other two to build with. But mostly, Twilight and Bon Bon did the work alone.

At last, the pillow fort was complete. It was so big that even Princess Celestia could step into its boundaries without destroying it. She smiled, admiring the careful crafted creation. "Wow! This is the best pillow fort I've ever seen! You foals have clearly outdone yourselves!"

Twilight beamed with pride. "You like it, Mommy?"

"Like it? I love it!" Celestia happily exclaimed! But then she sniffed the air as a familiar stench reached her nostrils. In a playful, motherly tone of voice, she declared. "Uh-oh, I smell stinkies. I think somepony worked a little too hard to build the fort."

"Who's the stinky one, Mommy?" Smarty Pants asked the sun princess. "I know it can't be me."

Celestia chuckled. "Of course it's not you, Smarty Pants. And I know it wasn't me," She continued sniffing the air as she trotted around the fort, trying to pinpoint the source of the stench. When she got near Twilight, she swore the stench of manure and methane was stronger. But she still opted to pass by the padded alicorn and inspect Bon Bon and Lyra first.

Lyra's diaper was pristine, it still had yet to be used. And Bon Bon was only a little bit wet. So that meant it had to be Twilight. Sure enough, when Twilight's diaper was pulled back for an inspection, a faintly audible squishing sound could be heard as the padded alicorn's face turned bright red from shame.

"Sorry, Mommy!" Twilight apologized in a playful yet embarrassed tone of voice. "I just didn't feel like using the potty, that's all. I'm not in trouble, am I?"

The sun princess shook her head as she lifted her foul smell charge into the air. "Of course not. You shouldn't feel ashamed about what you do or how you do it," She pretended to gag and wave a hoof. "But a little heads up the next time you decide to go poopy would be nice. And maybe we need to cut back on letting you drink my milk all the time, it seems like this happens a lot when I breast feed you."

"It does?!" Twilight asked in what sounded like sincere concern.

Princess Celestia laughed. "Oh Twily, don't be silly. I was only teasing you. There's no way my milk could make you mess yourself any more than anything else could. Besides, your body's surely gotten used to it by now." Then she carried the stinky princess out of the pillow fort, and to the changing table to be changed into a clean diaper.

Bon Bon and Lyra utterly enjoyed the rest of their day camping out in the pillow fort with Twilight. They even made a pretend campfire to tell stories around.

But of course, the day eventually came to an end. Lyra was still mentally regressed when she and Bon Bon left the castle that evening and returned to Ponyville.

Next morning, however, Lyra woke up and yawned as she opened her eyes. "Hey, Bon Bon," She greeted in a normal tone of voice. "So was our 'secret mission' to Canterlot yesterday? I wasn't too much of a hoofful in my regressed state, was I?"

Bon Bon shook her head from side to side. "No you weren't, Lyra. In fact, it would seem that even when mentally regressed, you still had enough self control to use the bathroom like a grown up."

Lyra let out an unhappy sigh. "Oh, that's a shame. I was hoping that even my potty training would leave me if Princess Celestia regressed my mind. Maybe next time I should have her turn me into an actual foal again."

"Only if I get to be regressed with you, Lyra," Bon Bon replied. "You looked like you were having so much fun in that carefree state of yours," Then she spotted something out of the corner of her eyes. It appeared to be a note of some sort resting on a small table. "Hang on, Lyra. I think Princess Celestia might have left something for us." She trotted over, picked up the note, and read it aloud:

Dear Bon Bon and Lyra,

I know I probably don't need to write this letter, but I want to thank you both for being such good playmates for Twily yesterday. You were probably some of the best playmates she's ever had. And it warms my heart to know that she's got so many good friends who can be trusted to keep her secret.

You two both strike me as ponies who know the importance of keeping secrets, and how much it can hurt when those secrets get exposed. So I know I can trust you both not to tell anyponies not already in the know about Twilight's secret. If you do tell, then far worse punishments than going back to diapers await you.

As promised, you'll both have something that you've been longing for. Bon Bon, I've already talked it over with S.M.I.L.E., and you are officially approved for time off to be with Lyra. You can pursue your relationship with her in peace.

And Lyra, I have enclosed something here that I think you'll quite like.

Sincerely,

Princess Celestia

By the time Bon Bon had finished reading the letter, Lyra had raced over to the stand and eagerly examined everywhere underneath it! Her eyes lit up like stars when she saw some rather large (and rather strange looking to Bon Bon) gloves! "No way! Princess Celestia came through!"

"Came through with what, Lyra?" Bon Bon asked.

Lyra quickly slipped the gloves on with her magic, then stood up on her hind legs and said with an exceptionally bright smile! "Fingers! This is it! This is the proof I've been searching for for so long! Humans do exist!" She threw back her head and laughed. "They all thought I was crazy. Well, who's laughing now?!"

Coco (Coco Pommel)

Author's Note

Well, since Coco is the only one who got any votes this time around, she obviously got to be the star for this chapter.

Once again, Scootabom1 provided the ideas for what to do with Coco: First suggesting that she and Twilight wear cute outfits and hunt for colored eggs together, then suggesting that she be slightly regressed and have a stuffed animal of her own that got a tear. In that regard, I drew on inspiration from Toy Story 2 and how Woody got his arm ripped. Tiber Septim II suggested having Twilight get sleep paralysis that would lead to Princess Celestia sleeping with her every night, but I decided against it specifically because I still want to give myself an off ramp whenever I decide this fic has run its course.

Once again, I drew on inspiration from "Potty Training Tales", this time with Coco's prompt. But only in regard to her family and her connection to Charity Kindheart. As far as I know, it's the only time there's been any elaboration on Coco's past.

Characters previously voted on:
Derpy - One vote
Spike and Shining Armor (Together) - One vote
Limestone Pie, Marble Pie, Sassy Saddles, Fleur - One half vote

Coco (Coco Pommel)

Princess Celestia gently nudged the sleeping form of her fellow alicorn, who was currently sound asleep in nothing but a diaper. She had a very big surprise (well, okay, maybe not that big a surprise) that she wanted to give to Twilight, and she could do that if the padded princess was woken up.

Twilight twitched and rolled a little, moving from side to side on her bed. But she did not awaken, she continued to slumber on.

Celestia sweetly, motherly called out to Twilight. "Twily, it's time to wake up."

Still, Twilight wouldn't budge. She was apparently in a very deep sleep. There seemed to be no signs of distress coming from her, but it looked like she was fighting any attempts to get her to wake up.

The sun princess started to frown ever so slightly. She very well couldn't let Twilight keep on sleeping like this, the padded alicorn would sleep through the whole day at this rate. "Twily, please, you have to wake up!" She said much more sternly. "Come on."

A groan escaped Twilight's lips as she seemed to obey ever so hesitantly. She yawned, her eyes slowly fluttering open as she moved to sit up, all the while her diaper crinkled audibly underneath her. "Mommy, why did you have to wake me up?" She asked, rubbing a hoof over her sleepy eyes. "I was having the most wonderful dream. I was with my friends, and we were all having a playdate and sleepover together."

Princess Celestia smiled sweetly. "I'm sorry, Twily. But you've been asleep for almost half the day now. Much as I want you to get your beauty sleep, I can't let you sleep all day long. After all, that wouldn't be very fair to the pony I specifically asked to be here today."

"Oh boy, another playmate!" Smarty Pants happily chirped. "Who do you think it's going to be this time, Twily?"

The young alicorn yawned a bit more, wiping the last of the sleep from her eyes. "I don't know, Smarty Pants. Mommy doesn't tell me about these things. She just schedules these playdates whenever she finds time."

Celestia nodded. "Because I want it to be a surprise. Plus, this particular pony was rather shy about coming here, especially when I told her it would involve diapers. But give credit where credit is due, she didn't back out."

Twilight blinked in surprise and confusion. "Did you get Fluttershy to come here, Mommy? She already knows about my secret, why would she be shy about doing it all again?"

The sun princess chuckled. "It's not Fluttershy, Twily. For one thing, this pony comes from Manehattan of all places. And she's an earth pony, not a pegasus," She then turned her head and her attention towards the bedroom door, sweetly calling out. "It's alright, you can come in now. There's no need to be shy, Twily's in diapers too."

A sweet, gentle, innocent sounding voice softly whimpered in reply. "Y-you sure, princess? I... wouldn't want to be a burden." Yet within seconds, in waddled a whitish-yellow coated earth pony mare of maybe slightly smaller than normal build. She had innocent light cyan eyes and a two toned light greenish gray mane and tail. More noticeably, she had a cream colored onesie and matching suit that almost looked like a pair of hoofied pajamas, yet they did little to conceal the obvious diaper shaped bulge sticking out of the back.

Twilight's eyes went wide and a gasp escaped her lips! She recognized the earth pony at once. "Coco?" She asked as she leaped down from her bed and waddled over.

"Um... y-yes," Coco stuttered and shrank a bit from the princess' gaze. "P-please, don't be mad. I... didn't mean to find out about your secret. It's just that..." She whimpered and blushed. "Rarity started forwarding some very 'strange' dress designs through her boutiques, but she wouldn't say why. I just started noticing how they were kind of meant for a pony of your size, and how they all involved space for diapers. It wasn't hard to put two and two together. But I never told anypony, not even Rarity!"

Twilight happily hugged the onesie wearing earth pony. "Oh, it's okay, Coco! Rarity already knows. Still, thanks for keeping my secret a secret," She giggled and swished her tail. "Even if it's not that much of a secret now. Lots of ponies know about it, thanks to my mommy."

Coco Pommel blushed further. "H-how is the princess your 'mommy'? Is it like playing a role in some kind of show? Like one of those Bridleway musicals?"

"Duh, of course it's like that," Smarty Pants spoke up (even though it was obvious to Coco that it was really Twilight speaking through the doll). "Didn't you ever like to play pretend or dress up when you were a foal?"

Coco nodded ever so slowly. "Yeah, all the time. My mother and father were always big into theater, especially anything having to do with Charity Kindheart. Charity really helped me a lot when I was growing up, it was like she was an aunt to me, or a big sister I guess."

Twilight playfully giggled. "Hey, it's okay, I had a big sibling too. But it was a big brother, not a big sister."

Coco let out a sigh, looking back to her onesie. "Well, it's still kind of weird going back to diapers, especially these kinds of diapers. Growing up, my parents usually preferred the old fashioned cloth ones because they cost less than the store brand disposables. My mother was new to Manehattan, she came to the city from Trottingham after she fell in love with my dad. And he was a chariot driver."

"Ooh! Chariots?! How exciting!" The padded princess eagerly exclaimed!

The onesie wearing earth pony shyly confessed. "Not those kinds of chariots. It was just fancy talk for cabs. Father worked long hours carrying passengers up and down the busy streets. But he always found time to come home and be with me," She sighed. "He only just retired a little while ago, I haven't seen him since I moved out of the house. I really should go and see him and mother again sometime. Sometime after today, of course."

Twilight nodded. "Uh-huh, because today you're my playmate. We're gonna have so much fun together, Coco!"

Coco then cleared her throat. "Well, before we begin, there... is a little something I wanna show you. It's something I held onto in secret to remind me of my foalhood. I told myself it was more of a good luck charm than anything, but the truth is I just had a lot of memories attached to it," She reached into a small saddlebag she'd brought with her and pulled out a stuffed rabbit that had clearly seen better days. It looked just as old and beat up as Smarty Pants. "This is Floppy. She was my best friend when I was a foal. We did everything together, until Mother said I was too old to be playing with dolls and made me put her away."

"Does she talk?" Smarty Pants asked as she waved a hoof in front of the stuffed rabbit.

The shy earth pony mare nervously replied. "She's really more of a listener, like me," She let out a whimper. "Sorry if I'm not very good at this. It's not like I don't want to pretend to be a foal again, I have fond memories of my time in diapers. I'm just a little uncomfortable about it all, and I wish I knew why."

The padded alicorn happily beamed. "Hey, it's okay. You can learn from me. You'll see that being a foal again can be the best thing ever! Ever since I started doing this with Smarty Pants and Mommy, I've had the time of my life! And I bet you'll be the same."

Princess Celestia then chimed in with a proposal of her own. "If it helps, I'd be happy to grant you any one thing your heart desires, Coco. As many of Twily's playmates can attest, I'm quite good at making dreams come true. All I ask in return is that you not tell anypony about Twily's secret who isn't already in the know."

At that, Coco trotted forward and somewhat hesitantly asked. "Then maybe you could... regress me a little, just in mind? I think it would be easier if I had more of a foal's mindset. It wouldn't have to be anything heavy, and I'd like it to be temporary."

Celestia nodded, lighting up her horn. "If you're sure that's what you want, Coco. Hold still, please." She then gently brought her glowing horn close to Coco's forehead. There was a sudden, bright flash!

When the flash faded, Coco appeared to be no different from how she currently was. She was just standing there, blinking slowly and staring straight ahead.

Twilight eyed Coco with concern, waiting to see if she would say or do anything. When a minute passed without any sort of reaction from the onesie wearing earth pony, the padded princess approached her and asked. "Coco, are you okay? Are you feeling different at all?"

The shy earth pony mare was silent for a bit, before her lips curled into a small smile. "I feew fine," She spoke, a noticeable lisp presenting itself. "Sowwy, I'm stiww a wittwe shy."

The diapered alicorn wasn't bothered in the slightest by this statement. "Hey, that's okay. You'll get used to your role eventually."

"And we're gonna have so much fun together!" Smarty Pants proclaimed! "You can even invite Floppy to be part of the fun too! Who wouldn't like that?!"

Coco babbled. "No one," She turned to the stuffed rabbit. "Hey, Fwoppy, guess what? We've been invited to pway with Twiwy and Smawty Pants."

Floppy began to speak in a noticeably squeaky tone of voice. "Sounds wike fun! We get to pway with a pwincess."

"Uh-huh," Twilight giggled. "And Princess Celestia is our mommy! She's the bestest mommy ever!"

Princess Celestia beamed with pride. "Oh, Twily, I never get tired of hearing you say that."

"Oh, but I mean it, Mommy," The padded princess proudly proclaimed. "You really are the best mommy ever! You always know just what to say or what to do to make me feel better. And you keep finding so many friends for me to play with. I couldn't ask for a better mommy if I tried."

Celestia smiled sweetly. "I'm flattered you think so highly of me, Twily. You've always been like a daughter to me, and this way we can make that bond more official," She quickly recovered and cleared her throat. "So, my little ponies, what would you like to do first? I have something special planned, but I want to wait until later in the day when it's not so hot out. Plus, I still need to wait and get the all clear from my guards."

Coco and Floppy turned to Twilight and Smarty Pants, asking the two. "What do you wanna pway?"

Twilight Sparkle put a hoof to her chin, deep in thought. She wasn't used to taking the lead with her playmates, she was usually content to let them set the tone and pace for her playdates. She thought, and thought, and thought some more. Then it came to her all of a sudden! "I know," She excitedly proclaimed. "Floppy and Smarty Pants can play together, like friends or a team."

"Oh, do be cawefuw with Fwoppy." Coco shyly whimpered.

Floppy added. "Yeah, I bwuise easiwy. I not wike you, Smawty Pants, I can't take a wot of punishment."

"Don't worry," Smarty Pants reassured the stuffed rabbit. "We'll be careful, I promise. Twily's a lot more gentle with me now than she used to be."

Twilight nodded. "Uh-huh," Then she looked around as another idea came to her. "I think I know what Smarty Pants and Floppy can do together," She then frowned. "But we'll need some more plushies to be able to do it."

Princess Celestia was quick to reply. "Oh, is that at all, Twily? You know you can always ask me for help," She quickly lit up her horn again, soon summoning two very familiar looking (at least to Twilight) plushies: One being a stuffed turtle and the other being a giant, stuffed snail. "Recognize these, Twily?"

The padded princess' mouth nearly dropped open in shock and surprise! "Mommy, you borrowed Brutus Force and Whammy?"

The sun princess playfully reassured her charge. "No, I just made copies of them. Shining and Cadence were more than happy to let me do it, and Flurry Heart took only slightly more convincing," She then encouraged as she stood up. "Now go ahead, get all set up."

"Where are you going, Mommy?" Twilight asked her fellow alicorn.

"To the bathroom," The elder alicorn explained. "After all, mommies and daddies go potty too. Just remember that you and Coco are to stay in this room, no wandering off." And she trotted away, leaving the two padded ponies alone.

Princess Celestia returned a short time later, and she was utterly astounded by the incredible display that her charges had managed to set up during her absence!

Smarty Pants was nowhere to be seen, but Floppy was standing at one end of the room next to a large box. Whammy was wearing a hat that was made to loosely resemble a royal guard captain's helmet, and stood on a bucket of some kind. Directly beneath the snail plushie was a bunch of miniature royal guard figures. Brutus Force, meanwhile, was dangling on a rope, swinging back and forth between a toy shark and some stuffed, miniature parasprites.

"Help! Help! Somepony save me, please!" Brutus Force called out in a noticeably high pitched, feminine sounding tone of voice.

"Let Bwutus Fwoce go, Whammy!" Floppy demanded of the stuffed snail.

The stuffed snail just replied in an exaggerated, gruff sounding voice. "That's Dr. Whammer to you, Floppy! Now you must choose: How shall Brutus Force die? What should be his fate: Eaten by sharks?" Brutus Force briefly hovered over the toy shark. "Or death by rabid parasprite?!" Brutus Force then hovered over the parasprites as they buzzed ominously beneath him.

Floppy was silent and said nothing, weighing her options.

Whammy then laid bare her demand. "Choose, and choose now!"

But Floppy turned to the box and shouted! "I choose you: Smawty Pants!" And mere seconds after she said that, the box was thrown open, and out burst Smarty Pants!

This unexpected decision took Whammy by surprise, prompting her to exclaim! "What?! That's not a choice!" But it was the last thing she said before she was knocked over by Smarty Pants, who was wearing a cape and flying through the air!

Brutus Force was quickly snatched up by the toy donkey, freed from the rope, and brought to safety. "Thank you, Smarty Pants! You're my hero!" Brutus Force dramatically exclaimed!

Floppy, meanwhile, waited for the two plushies to return to her. Then she approached Smarty Pants and greeted her warmly. "You did it, Smawty Pants! You saved the day!"

Smarty Pants happily grabbed Floppy by one arm, pulling her close. "No problem, Floppy. All in a day's work for the two bestest buds in the history of forever!" But a second or two later, there came a faintly audibly ripping sound. Suddenly, a large gash appeared on the arm of Floppy that had been grabbed! It looked as if cotton was about to spill out of the stuffed rabbit.

When Coco saw the tear, she immediately began to whimper and tear up! "Fwoppy!" She cried in distress!

Twilight was stricken with horror and hastily tried to apologize. "I'm sorry, Coco! I didn't mean to! It was an accident, I swear!"

Princess Celestia immediately came trotting up on the scene, quickly moving to calm the crying Coco down. "There there, Coco. It's alright. I can fix it," She gently picked up Floppy with a hoof, eyeing her closely. "Of course, it will take a while."

"But... but... I need Fwoppy! She's my bestest fwiend!" The onesie wearing earth pony pleaded, her eyes already stained red from the tears.

Twilight, thinking quickly, waddled over to Coco and hoofed her Smarty Pants. "You can borrow Smarty Pants for a while, I don't really need her."

Coco was surprised by the act of kindness. "Y-you suwe, Twiwy?"

Smarty Pants spoke up. "It's okay. I had to spend almost a year apart from Twily after she used me to try to create a friendship problem. At least with you I know I won't end up being a chew toy for a farm dog," When Coco shot the stuffed donkey a side glance, Smarty Pants added. "It's a long story." And to her great relief, Coco didn't ask for more details as she instead took hold of the stuffed donkey and held her close.

The sun princess smiled. "I'm very proud of you for giving up Smarty Pants like that, Twily. That was a very nice thing to do."

Twilight beamed with pride, appearing to be only slightly exaggerated. "I knew it would make you happy, Mommy. Plus, that way, Coco has someone to keep her company until you fix Floppy."

The elder alicorn nodded back. "Well, perhaps I can reward you for it somehow. Give me some time to think about it," Then she turned her attention to Floppy, "But for now, I've got a stuffed animal to fix up. So you and Coco go play, and I'll bring Floppy back as soon as she's good as new, I promise."

Princess Celestia was as good as her word. She took the well worn stuffed rabbit into another room, confident that Twilight and Coco would stay out of trouble in Twilight's bedroom until she got back.

As the sun princess set to work on fixing up the rabbit plushie, threading a needle through the worn fabric to mend the seam, she started thinking about that proposal she had made to Twilight. What could she offer to her charge when she'd already given her so much as it already was? Plus, she still had to consider that nagging concern in the back of her mind that had first been raised with Luna. Sure, it had been a long while since that concern had first been raised. But there were still those fleeting moments here and there that brought them back into the forefront of the alicorn with a majestic white coat's mind.

She quickly pushed those thoughts and concerns to the back of her mind. If it wasn't an immediate problem and Luna wasn't bringing it up to her even in passing, then she didn't see what there was to worry about. She made a mental note to have another talk with her sister though, just in case Luna had noticed something that Celestia herself hadn't.

A short time later, Celestia had fully repaired Floppy and teleported back to Twilight's bedroom. To her delight, she witnessed Twilight and Coco taking turns putting various small sheets on Smarty Pants, pretending that they were different sorts of clothes.

The elder alicorn mare cleared her throat, alerting both of her charges to her presence. She then held out the fixed up Floppy, and watched as Coco happily waddled over to claim it once again! "Fwoppy!" She hugged the stuffed rabbit tightly! "Oh thank you, Mommy! You fixed Fwoppy! She's good as new now, wight?"

Princess Celestia nodded ever so slowly. "Indeed she is. Hopefully, she won't tear again so easily. But just to be safe, try not to play so rough with her."

The onesie wearing earth pony mare happily nodded back. "Okay, I wiww."

The sun princess smiled, watching as Twilight took back possession of Smarty Pants as a result of the repairs to Floppy. She then decided that now was the perfect time to perform an unannounced diaper inspection. She started first with Twilight, seeing as the padded alicorn's diaper was easier to inspect.

"Mommy, why are you checking me?" Twilight asked in apparent surprise. "I didn't have an accident."

"Never hurts to be sure, Twily," Celestia cooed in a motherly tone as she pulled the padding back and examined it very thoroughly. "Foals don't always know when they have to go, even when they're in potty training," But sure enough, she saw that the padding was still spotless: No stains, no stenches, no damp patches. "Seems you're dry for now, Twily. Just remember to tell me if you think you have to go, okay?"

The padded princess nodded. "Uh-huh, I remember, Mommy."

Princess Celestia then trotted over to Coco, using her magic to pull down the cream colored onesie. "How about you, little Coco? How's your diaper holding up?"

Sheepishly, the padded earth pony stuttered. "W-weww, I-I..."

But once the diaper was pulled back for an inspection, there was no need for Coco Pommel to have said anything. The visible damp patches that had been hidden by her onesie were now there for all to see. There weren't that many of them, but they were still there and stood out in bold detail.

Celestia just flashed a motherly smile, taking hold of the earth pony mare with her magic. "It's alright, a foal's bladder can be unpredictable sometimes. This is why foals should always have a mommy or daddy," She floated Coco through the air. "Let's get you changed into a clean diaper-wiaper before you get a rash."

Quick as a flash, Coco's old, damp diaper was pulled off her, balled up, and tossed into a diaper pail for disposal later. Then, several wet wipes worked their magic on her flanks, removing all traces of her accident. Finally, a clean diaper was taped to her rump, and a generous helping of foal powder was sprinkled in. The scent of cornstarch tickled Coco's nostrils and made her sneeze ever so faintly.

"Thank you fow cweaning me up, Mommy," Coco said afterward as she was lifted off the changing table. "Sowwy I didn't teww you I went potty."

The sun princess cooed and reassured her charge. "Oh it's quite alright, you couldn't help it. When you gotta go, you gotta go. That's why you're wearing a diaper."

Coco still vowed. "I pwomise I'ww teww you next time I tink I have to go. I gotta twy to be a big pony wike Twiwwy."

Princess Celestia gently padded Coco on the forehead. "You do whatever makes you feel most comfortable, Coco. If it means using your diapers for a bathroom, that's fine by me. Trust me, I'm more than used to diaper changes at this point. After how many of Twily's diapers I've changed, it's practically second nature to me." Then she helped the earth pony put her cream colored onesie back on, making sure it was nice and secure.

Sometime later, the elder alicorn clapped her hooves together and called for Twilight and Coco to come over to her. They did so without hesitation, both of them carrying their plushies with them.

"What is it, Mommy?" Twilight was the first one to ask.

Celestia sweetly said to the padded ponies. "Since it's such a nice day out, I was thinking you two should go outside and enjoy the sunshine. It's cooled down a little bit now, so it shouldn't be too hot for either of you."

But Coco whimpered and froze on the spot. "Go outside? But evewypony wiww see us in ouw diapees! Tey gonna waugh at us!"

The sun princess quickly reassured the frightened earth pony. "No they won't. You're just going to go outside into the castle courtyard. My guards have already made sure to clear it, so it'll just be the three of us together. And I've instructed them to make sure nopony tries to sneak in or take pictures. I have my best guards maintaining a security perimeter, so you'll be safe."

Coco breathed a small sigh of relief upon hearing those words. "Tank you, Mommy."

Princess Celestia nodded in reply. "It's my pleasure. Now come along, my little ponies. I think you'll quite like the fun little activity I've set up for you." And she quickly teleported them to the castle courtyard.

When Twilight and Coco took in their surroundings, they quickly noticed what appeared to be brightly colored plastic eggs off in the distance, scattered all over the length of the courtyard (even down to some being hidden in bushes).

Celestia quickly explained to the two padded ponies. "How's about a little game? I've placed colored eggs all over the courtyard, and I want you both to look for them: Every last one of them. You have until sundown to do so."

"What do we get if we win, Mommy?" Twilight asked.

The alicorn mare with a majestic white coat explained with a knowing wink and a mischievous smirk. "You'll just have to wait and see, because that's my little secret," Then she lit up her horn, bringing forth a comically oversized chest. "However, there is a catch: You're both going to have to wear costumes while you hunt for the eggs," She quickly opened it up, revealing several large animal colors in bright hues of blue, pink, and yellow. "Compliments of Rarity For You, Canterlot Carousel, and of course Carousel Boutique." She happily informed her charges.

"Oh boy! Oh boy! Oh boy!" Twilight happily exclaimed as she clapped her hooves together and shook her tail from side to side! "Isn't this exciting, Coco?! We're gonna have the bestest time together, you and I!"

"Y-yeah, suwe." Coco replied, before she and Twilight almost literally dove into the chest to pick out their costumes. It reminded Coco a lot of all the times her mother would help her pick out an outfit to wear for the day, giving her a role to play. Her father had sometimes joined in, more so when she was older. She still remembered his speeches about "fancy talk" instead of getting to "the business", and of ponies who "talk the talk" but didn't "trot the trot".

It didn't take long for Twilight and Coco to find the outfits they wanted to wear. They opted for a matching set of bunny costumes, complete with zippers and a hatch in the back to make diaper changes much easier. The only difference is that Twilight's was pink, and Coco's was bright yellow (to the point where she almost completely blended in with it).

The sun princess then instructed for the costumed ponies to begin their search. "Come back and see me any time if you need help." She sweetly reassured them.

Rather than trot through the courtyard and the lush greens, however, the two padded ponies opted to hop like they were actual rabbits. And with every bounce, their diapers crinkled ever so faintly.

The search for the colored eggs lasted for quite a while. It seemed like there was no end to how many eggs there could possibly be. Soon, Twilight and Coco were filling up a huge whickerbasket with the plastic eggs, which was only whisked away by Princess Celestia once it was filled to the brim. And still, there were more eggs to find.

Naturally, being in the costumes in the bright sunlight made the two padded ponies start to get rather warm. The heat wasn't unbearable, but it was noticeable, and they started to sweat ever so faintly as a result.

At last, Twilight and Coco found the last egg, nestled deep in one of the bushes near the fountains, and placed it into what was either their third or fourth whickerbasket (they had lost count).

"Well done, my little ponies!" Princess Celestia cooed with exaggerated praise as she watched the padded ponies come bouncing back to her. "You did such a good job! Yes you did! Yes you did!"

Twilight then excitedly asked her fellow alicorn. "So what do we win, Mommy? What's our reward?"

The sun princess snickered. "You've both won a free bath. You two worked up quite a sweat back there. Now you're all dirty and sweaty, so you need to be cleaned."

"Can it be a bubbwe bath, Mommy?" Coco sweetly asked with the most perfect pair of pleading puppy dog eyes. "Pwease?"

Try as she might, Celestia couldn't say no to such a sweet face. "Oh, very well, a bubble bath it is," She agreed. "But first, let's get you back inside and changed out of those stuffy costumes."

The bubble bath that came soon afterward was quite relaxing to both Twilight and Coco, who enjoyed splashing about in the tub whilst Princess Celestia scrubbed them clean from head to hooves.

Afterwards, the two ponies were dried off and rubbed down, then strapped up into clean, new diapers. And following some fresh, warm bottles of milk, it was time for the padded ponies to go to bed.

Princess Celestia opted to settle down next to Twilight, more so to keep an eye on Coco since she suspected the slight mental regression would be wearing off shortly.

Indeed, not long after Twilight had fallen asleep and started snoring audibly, Coco blinked and rubbed her eyes. Then, after smacking her lips, she started to speak in a normal sounding tone of voice. "Is it over, Princess Celestia?" She asked in a whisper.

Looking across to the slumbering alicorn beside her, the sun princess happily nodded. "Indeed it is, Coco. Thank you again for agreeing to all of this. You were such a fantastic playmate for Twily."

"It... was actually kind of... nice, I think," Coco confessed. "Maybe next time I won't need to have you regress me at all, and I'll be able to play the role naturally."

"Just remember," Princess Celestia cautioned. "You're not to tell anypony who doesn't already know. If you're not sure, just ask. If you tell, bad things will happen to you."

The onesie wearing earth pony firmly protested. "I'd never tell anypony! Not a soul!"

Celestia smiled, relaxing her overall posture. "Good. I had a feeling you would say that, but I just wanted to be sure," She then turned to Coco, whispering softly to her. "Are you sure you don't want me to give you anything as a reward? Isn't there something you'd like to do that you might need a little help with?"

Coco firmly shook her head from side to side in response. "No, I'm good. I'm happy with where I am and who I am right now. Life's pretty good for me."

"Well, if you're sure," The alicorn mare sweetly replied. "But if you ever should change your mind, just let me know."

Spike and Little Shiny (Spike and Shining Armor)

Author's Note

Spike and Shining Armor won the tiebreaker, so here they are. Eregonlover was the first to propose having them be together, and that Spike should fake being mentally regressed like he did in the original fic. He also said Shining Armor should be a "Little" brother, and when pressed he said it was up to me whether to make it physical, mental, or both in terms of regression. Seeing as I haven't done physical regression since Princess Luna, I figured it would be cute to do it again with Shining Armor. I naturally decided to borrow a bit from FabulousDivaRarity, who has written a lot of headcanon fics about Shining Armor and Twilight Velvet, and the bond they shared.

Tiber Septim II proposed the idea of Twilight waking up feeling ill, or crying after Prince Blueblood said hurtful things to her. I decided to hold off on the latter for now in case Prince Blueblood ever receives enough votes to star in his own chapter, but the former sounded interesting.

Because of this chapter, Spike and Shining Armor are no longer eligible to appear together except with the following characters: The mane six (for Spike), Princess Cadence (for Shining Armor and potentially Spike, Flurry Heart is still ineligible under any circumstances), or the whole Sparkle family sans Flurry Heart.

Characters that can only be done in group pairings:
Mane six
Princess Cadence
Princess Luna
Octavia and Vinyl Scratch
Twilight Velvet
Spitfire (with or without Wonderbolts)
Lightning Dust
Maud Pie (without Mudbriar)
Moondancer
Cheerilee
Lyra and Bon Bon (separately, or together)
Coco

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family

Characters previously voted on:
Limestone Pie - One and a half votes
Derpy, Marble Pie - One vote
Sassy Saddles, Fleur - One half vote

Spike and Little Shiny (Spike and Shining Armor)

Twilight sat up in bed and rubbed her eyes, coughing in a bit of a raspy tone of voice. Her throat felt sore, and she was beginning to feel a bit warm. She sniffled, sensing that her nose was starting to become congested. "Mommy," She called out to Princess Celestia (who was not far away). "I'm not feeling well. I think I'm catching something."

Princess Celestia immediately trotted over to her fellow princess and lowered herself to Twilight's level. She carefully put a hoof to Twilight's forehead to check her temperature. A motherly smile came onto her face as she did so. "Hm," She said in a gentle, comforting tone. "You do seem to have a slight fever, Twily. Nothing too serious, it would seem. And luckily for you, I know just the thing to make you feel better." She quickly lit up her horn and teleported away.

Twilight, for her part, moaned and groaned as she sniffled some more. The icky feeling in her throat and nose was starting to become more pronounced. She wished more than anything she could snuggle up next to Princess Celestia and go back to sleep (assuming her symptoms would let her).

The sun princess soon returned, holding a large bottle and a metal spoon within the glow of her horn. She then trotted back over to the bed her fellow alicorn was resting on, and sat upon it. She then carefully unscrewed the bottle cap, pouring some of its contents onto the spoon. It was a rather unappealing looking brown in color. Using her magic, she then pulled back the bedsheets and nudged her padded charge towards her. "Come on, Twily. This should help bring down your fever and clear up some of that stuffiness in your nose."

The padded princess eyed the medicine with a skeptical eye. It had a very strong smell to it, and it rather put her out of the idea of taking it. "I don't want to, Mommy! I want to sleep!" She protested and turned her head.

Celestia chuckled. She was certain this was mostly just an act from Twilight, so instead of being annoyed or frustrated she instead gently coaxed her former student. "Don't be so fussy, Twily. This will make you feel better, I promise, Trust me, once you take this, you'll feel a lot better," She then teased. "It's either this, or I ask Velvet for her special soup, the one with all those icky vegetables in it."

Twilight stuck out her tongue and made a gag motion. "Yucky!" She sighed and reluctantly scooted closer to the sun princess, still eyeing the liquid medicine with hesitation. Even so, she didn't try to fight it as it was brought towards her lips and then deposited onto her tongue. She immediately swallowed, only to be nearly overwhelmed by the medicine's strong taste! "Gah!" She exclaimed, coughing a bit more as a result!

Princess Celestia just smiled, nudging Twilight close to her teets. "There there, Twily. It's okay. Maybe some of my milk will help wash the taste out of your mouth."

So the young, padded alicorn obeyed. She quickly latched onto a teet and suckled as hard as she could. Sure enough, the rich, creamy taste of Celestia's breast milk easily washed away the foul taste of the medicine. And once the medicine was inside of her, she began to feel just a little bit better. Her fever disappeared, the congestion cleared up a little, and although her throat was still a bit raspy it didn't hurt as much.

Celestia, meanwhile, took the liberty of performing a diaper check on Twilight. She found it dry and clean, and playfully patted the padded princess on the forehead. "Good job keeping your diaper clean, Twily. You're getting so good at that. I almost can't remember the last time I had to change a messy diaper."

"I'm just trying to make you happy, Mommy." Twilight replied with a smile.

"Twily, we've been over this, I want you to do whatever makes you most comfortable," Princess Celestia spoke up in a somewhat more serious tone of voice. "If you're intentionally holding off on having accidents, that's just as bad as having them. I understand if you can't make it to the potty sometimes. Your diapers are there for a reason."

The padded princess nodded. "Uh-huh, I know."

"Just making sure you're aware of that, Twily," Celestia replied. "As long as you're happy, it doesn't matter to me if you use the potty or go potty in your diapers. And I will always love you no matter how stinky or smelly you might get."

Smarty Pants then spoke up in a teasing tone of voice. "That's a good thing, because you can be a really stinky, smelly baby sometimes, Twily."

Twilight let out a playful whine as she blushed bright pink. "Smarty Pants, you know it's not funny to make fun of ponies for things they can't control!"

"I know, I know. I'm more than used to it, Twily," Smarty Pants smiled back. "It's nothing compared to what I had to endure as Winona's chew toy. Living on a farm is so smelly, I have no idea how anypony could put up with it."

Twilight then hugged Smarty Pants tightly. "Well don't worry, I'll make sure you never have to endure anything like that ever again, Smarty Pants. You and I will be together forever!"

Princess Celestia then cleared her throat. "Not that I mean to interrupt such a touching moment, Twily, but I did invite someponies over to play with you today."

The padded alicorn let out a gasp! "Mommy, are you sure that's a good idea?! I might get them sick too!"

The sun princess chuckled and waved a hoof. "I made sure they're up to date on all their shots, Twily. There's no chance you'll get either of them sick. In fact, you couldn't get one of them sick even if you wanted to," She flashed a knowing wink. "And once you've met them, I think you'll understand why that is." She then got up from the bed and trotted across the room to the bedroom door, which she subsequently opened with her magic.

When the door swung open, in strolled a familiar looking but somewhat scrawny in appearance unicorn colt with snow white fur and dark blue hair, clad in nothing but a comically oversized crystal blue diaper. Accompanying the colt was a very familiar dragon with light purple scales and green spines, and who seemed to have a far away look in his eyes.

"Hi, Twily," The colt spoke up in a noticeably high pitched tone of voice. "Surprised to see me back in diapers? Well, Princess Celestia figured you could use a playmate more on your level this time. Besides, I could use a break."

The dragon, meanwhile, just lisped and babbled. "Twily!"

Twilight was rendered speechless at the sight! Before her eyes stood none other than Shining Armor and Spike, both of whom had apparently been regressed. And she was quite certain Princess Celestia was responsible for the regressions.

Shining Armor waddled towards Twilight after noticing that she hadn't spoken at all since seeing him and Spike. It seemed that his physical regression had not toned down his protective "big brother" instincts, for he looked up at her and asked her point blank. "Are you okay, Twily? Sorry if Spike and I startled you, but Mommy," He gestured to Princess Celestia, briefly pausing to comment. "Wow, it feels kind of weird to call her that instead of our actual mommy," He quickly recovered. "Anyway, she wanted our visit to be a surprise. So... surprise."

Slowly but surely, Twilight managed to recover from her state of shock. This was the first time she was going to be interacting with those who already knew about her secret. "Well, it's definitely a surprise," She commented. "But why didn't you let Mommy regress you in mind as well as body?"

Shining leaned close and whispered to his sister. "Spike's only pretending to be mentally regressed. You know, he's 'getting into character'," With a knowing wink he added. "I don't need that kind of incentive. Honestly, I've always felt like a big kid at heart. Probably 'cause of my... issues growing up."

"Oh, right," Twilight recalled. "Our mom did say you were born before you were supposed to be born, and that you were a late bloomer to a lot of things because of that. It's weird, because I've always known you as a big brother, and a very mature one at that."

Shining Armor let out a sigh. "Well, once you were born, I kind of had to grow up whether I wanted to or not. I couldn't be the baby of the family anymore. But a part of me always did wish it didn't have to be that way. That's why I was so fiercely competitive with you growing up. So I figured it'd be fun to have the roles reversed and let you be the older sibling for a change," He giggled and wiggled about in his pampers. "And before you ask, Cadence was okay with this. I knew I'd have to get her permission, I couldn't just leave her to take care of Flurry Heart all by herself without making sure she was onboard. She was nice enough to let me 'borrow' some of Flurry's diapers," Blushing a bit, he went on to say. "But as you can see, they don't quite fit me without some 'adjustments'."

Spike, meanwhile, just giggled, clapped, and cooed as a bit of drool escaped his lips. Compared to Shining Armor, he was wearing just a plain white diaper with nothing special. There were no colored tapes or leak guards, no cartoon characters or symbols printed on it to serve as wetness indicators, it was very much your standard foal diaper (albeit clearly modified to accommodate Spike's unique body type). "Play! Play!" He encouraged.

"Ooh, speaking of play," The stallion turned colt commented as he dug into his mane. "I have a feeling Smarty Pants will recognize the special guest I brought with me." He soon pulled out a very familiar looking, well worn stuffed turtle.

Smarty Pants was overjoyed at the sight! "Brutus Force!"

"Hi, Smarty Pants," Brutus Force spoke in an overly gruff sounding tone of voice. "Miss me? Well, when Shiny got invited to play with Twily, he said I could come along too."

"Just don't make me the damsel in distress again," Smarty Pants replied. "Once is enough for my tastes."

Brutus Force gave a nod. "Oh, don't worry, we won't be playing knights and dragons again. This time we can all have fun together! Besides, we have an actual dragon we can slay this time."

Twilight giggled. "I don't think Spike will really appreciate that. He likes to think he's a noble knight too, just like his big brother."

Shining then corrected. "Remember, Twily, I'm a little brother now too. I'm in diapers and everything. You're the big sibling, a big sister. I hear you can even use the potty now."

The padded princess sheepishly replied. "Well, somewhat. I still like my diapers, but the potty can be fun too sometimes. It's okay to still be in diapers even when you can use the potty, right?"

Shining Armor reassuringly nodded. "Of course it is, Twily. You do whatever makes you most comfortable. And there's no shame in taking your time to master the potty. I know it's partially my fault you had such a bad first experience with it. Besides, being a late bloomer kind of runs in the family. I didn't fully graduate from diapers until I was almost five, and I remember it took you a long time to get Spike fully potty trained too. I wouldn't be surprised if Flurry Heart is the same way once she's ready for potty training."

"Does she have her own friend like I am to Twily and Brutus Force is to you, Shiny?" Smarty Pants questioned the stallion turned colt.

"Yes indeed," The off-duty father said with a smile and a wink. "Her name's Whammy. I was originally going to give Brutus Force to her instead, but she took a real shine to Whammy. She was a gift from my mom. It seems she still has a knack for knowing what foals are like and what they need," He dreamily sighed. "Sometimes, I still wish it was possible to travel back in time, even just for one day. What I'd give to spend one more day as a foal in her care, just letting all my worries and troubles drift away."

Smarty Pants then spoke up. "Well, you should ask Twily's mommy about that. Twily's mommy can make ponies' dreams come true."

But Shining shook his head from side to side. "Nah, I'm good. I don't need her to be doing special favors for me. She's already given me two different days off to spend with Twily, and I intend to make the most of this one just like I did the last one."

Spike, meanwhile, impatiently shouted over and over again! "Play! Play!"

Twilight and Shining turned to the little dragon, realizing they had unintentionally been ignoring him all this time. Much as they might like to keep on chatting and catching up on developments in their lives, they would have to wait. Right now, Spike clearly wanted to be part of the family and to join in on the fun.

There was just one question left to be answered. What should they play?

Luckily for everyone, Twilight quickly got an idea. "Let's play hide and seek," She encouraged as she waddled over to her siblings. "I'll be the seeker, the rest of you can go and hide."

"Can I be the seeker with you, Twily?" Smarty Pants hopefully asked. "We do almost everything together."

Twilight shook her head from side to side. "Sorry, Smarty Pants. There can't be more than one seeker. You go hide with Brutus Force, Shiny, and Spike. I'm sure you'll find a good place."

Smarty Pants sighed as she was taken hold of by Shining Armor. "Well, okay, Twily. But I hope you come and find me soon. I don't want to be away from you for too long." She was then carried away with Brutus Force as Spike and Shining together waddled away to go hide somewhere within the bedroom.

The young padded princess waited a moment or two after everyone else had left to go hide, then she started counting very slowly. Part of it was because it was more fun that way, and part of it was because her throat still kind of hurt a little bit. The medicine hadn't completely cured her sudden sickness after all (no medicine could, after all. The only thing that cured an illness was time). And it seemed the medicine had an unintended side effect, because even though Twilight was sure she hadn't drank that much milk from Princess Celestia, her bladder was starting to give off signs that it would need to be emptied soon.

Rather than inform Princess Celestia and take care of the problem, however, Twilight instead opted to ignore it in the hopes her bladder would soon calm down. "I don't want to stop playing to use the potty," She thought to herself. "Besides, I'm sure I can hold it. All those times when I wet myself without meaning to were just because I was distracted." And so she continued counting, even as the aches and pains in her bladder did not diminish or even cease.

At last, Twilight reached the count of ten and lifted her hooves from her face! Loudly and playfully she called out! "Ready or not, here I come!" Looking around the room, she couldn't see any immediate clues as to the whereabouts of Spike, Shining Armor, Brutus Force, or even Smarty Pants. Clearly, they had hidden themselves well.

So the padded alicorn, with her diaper crinkling audibly with every step she took, waddled about the bedroom in search of her playmates. "Spike, Shiny, Brutus Force, Smarty Pants, come out, come out wherever you are!" She called. There was of course no reply, but she didn't care in the slightest.

Princess Celestia watched from afar, opting not to give her fellow princess any advice and instead let her figure it out entirely on her own. Yet she couldn't help but notice the occasional strained look on Twilight's face, coupled with the occasional shuffling back and forth on her hooves. She felt tempted to speak up, but something stopped her. "Twilight would tell me if she has to go to the bathroom," She thought to herself. "And I've said multiple times that I don't mind changing her. I don't want to force potty time onto her, she's only pee-peed in the potty twice and poo-pooed in it once. I don't want her to hate it and try to run away from it." And so she kept silent on that matter too.

Twilight, meanwhile, continued to trot and waddle about, looking for anything that might pinpoint the hiding places of her playmates. They had clearly hidden themselves quite well, because she thought for sure she would've found at least one of them by now. Had Shining secretly teleported them somewhere? Twilight quickly ruled out the thought. Even after his growth spurt, her brother was never that skilled with his horn. Teleportation was something only the highest level unicorns could pull off, and it was something she'd had to teach him after months of begging and pleading on his end.

So if they hadn't teleported, where were they hiding?

Suddenly, the padded princess paused and sniffed the air. She caught a whiff of something, a stench so very familiar to her. "Could it be?" She thought as she sniffed the air again, attempting to pinpoint the stinky smell's source. She sniffed high, low, and everywhere in between. The smell was growing stronger by the second, she was oh so close to finding its source.

At last, the diaper wearing alicorn crouched down and looked underneath her bed. She squinted, struggling to see in the dim light there. But she could just make out the form of Spike, huddled in a corner and suckling on his thumb. "Found you!" She exclaimed, a bit too loudly!

A startled Spike leapt up, bumping his head against the bed's underside! "Ow!" He cried as he started rubbing the sore spot with his claws, whimpering and sniffling a bit.

In an instant, Twilight forgot all about everything else and about the role she was playing. Her protective instincts kicked in as she used her magic to pull Spike close and then carefully brought him out from under the bed. She immediately checked him all over, relieved to find only the tiniest of lumps on the spot where Spike had bumped his head. "There there, Spike. It's okay," She proceeded to kiss the sore spot, lightly cooing. "There we go, all better."

Spike's sobs slowly ceased as he broke character and asked. "How did you find me, Twilight?"

The padded princess giggled. "Your dirty feet gave you away. They're so stinky, they could put any of my dirty diapers to shame."

"Nu-uh, not that stinky!" Spike playfully retorted with a slight lisp.

Twilight giggled again. "Uh-huh, they're definitely stinkier than a stinky diaper!" In a sweet and sincere tone of voice she added. "But that's okay, I love you no matter how stinky you are. And so does everyone else, especially Mommy."

Spike looked to Princess Celestia, who said nothing but reflected a firm and comforting look through her eyes. Slowly, he babbled. "Mommy."

"Yes, Spike, Princess Celestia is our mommy!" The diapered alicorn replied with exaggerated praise, almost like she was congratulating Spike for speaking his first words. "Now come on, let's find the others." As she spoke, she didn't seem to become aware of the faint hissing sound that indicated her bladder had finally stopped holding back. For a moment, her diaper swelled up. But even the damp sensation didn't seem to register in her mind. So absorbed did she appear to be in her playtime.

If Spike was at all aware of it, he said nothing. He just waddled along with Twilight, babbling and cooing as best he could. He seemed to be having the time of his life now that he and Twilight were both back in diapers.

Smarty Pants and Brutus Force were found not long afterward, both apparently having been discarded in a real hurry by Shining Armor. Yet he had taken the time to place them high up in a cabinet, counting on them to not be noticed.

It was Spike who spotted them, when he noticed a familiar stuffed leg poking out from one of the cabinets. "Twily!" He shouted, still lisping and babbling! He tried to point out the location as best he could and get her to notice it.

Sure enough, Twilight spotted the leg and opening the cabinet, she found the two plushies resting next to each other. She giggled for what felt like the fifteenth or so time this day as she brought them out. "Hey, were you two on a date or something?" She teased.

Smarty Pants and Brutus Force both said in unison. "What?! No!" But the way they denied it sounded very unconvincing (especially Brutus Force, who sounded a lot different now).

The padded alicorn snickered and tried to suppress further giggles. "Hey, it's okay. Your secert's safe with me, I won't tell."

"You promise, Twily?" Brutus Force sheepishly asked. "If Shiny hears about it, I'll never live it down! He'll tease me forever!"

"Yeah, little brothers can be annoying like that," Twilight said with a slight frown. "But they can also be a lot of fun. Besides, I know Shiny, and I know he's a good colt at heart. He doesn't tease me about still being in diapers," Under her breath she added. "Much."

Smarty Pants chimed in with her own sentiments. "Besides, he's lots of fun! He's so silly and goofy!"

Brutus Force nodded. "Oh, he definitely is. It's like he doesn't want to ever grow up. Why can't he be more of the strong, silent type like Spike?"

Spike babbled and cooed, clapping his claws together in delight.

The padded princess then declared. "That's enough, you two. It's rude to talk about other ponies behind their backs, even when they're total buttheads like Shiny," She stuck out her tongue in playful, exaggerated fashion. "Now come on, we've got to find him. He's got to be around here somewhere! He may be good at hide and go seek, but he's not better than me!"

Just then, the little group of friends happened to see a white colored whiz past them! They just managed to catch a glimpse of a behind clad in a thick, oversized, crystal blue diaper, before they heard a familiar high pitched voice taunt. "Can't catch me! Can't catch me!"

Twilight groaned ever so slightly. "Now I can see where Flurry Heart gets it from." She thought to herself. She then chased after her "little" brother, shouting at him! "Hey, get back here! You're not supposed to run away!"

"Sorry, Twily, but I'm not gonna make it easy for you!" Shining replied even as he continued shaking his padded posture at her. "If you wanna stop me, you gotta catch me first!" Yet seconds after he had said that, he ran smack into the legs of Princess Celestia. He snorted as he stood up, only to be tackled by Twilight before he had a chance to react. "Hey, no fair!" He complained in a slightly annoyed tone of voice.

Princess Celestia seemed to half coo, half scold the scrawny colt as she said to him. "Now Shining, you can't be running around like that, especially not during a game where you're supposed to stay hidden. You have to play by the rules, young colt."

"Aw, come on! I didn't hide in the place I was gonna hide in! I wanted to give Twily a chance," Shining Armor insisted. "But she was taking too long, I was getting bored."

The sun princess simply stated. "Either way, you owe Twily an apology."

The stallion turned colt slowly looked up at his "big" sister, shooting her the best pair of puppy dog eyes as he sincerely said to her. "Sorry, Twily. I just wanted to have fun, that's all. Plus, I kind of had to use the potty. And since I'm so small, I knew I wouldn't be able to do it all by myself."

"Well why didn't you just say that in the first place, Shiny?" Twilight playfully replied. "We could've paused the game for a potty break," She then sniffed the air and checked his diaper. "You didn't have an accident, did you?"

Shining Armor shook his head from side to side. "Nope, I didn't pee-pee or poo-poo myself, Twily. I'm pretty good at holding it. Princess Celestia may have turned me back into a colt, but my body still mostly functions like a full grown stallion's," Then he happened to look at his sister's diaper, and somewhat nervously asked her. "But uh, shouldn't you check your own diaper, Twily?"

"What do you mean?" Twilight questioned, before she felt her diaper compress and squish. Only now did she seem to notice that cold, damp sensation on her hindquarters. She looked back to her diaper, and saw a faintly visible damp patch. One that had clearly been there for a while. It was a miracle she hadn't gotten a rash yet.

Celestia trotted forward, immediately taking hold of Twilight with her magic. "I was about to ask you the same thing, Twily. Did you really not know you'd wet yourself?"

The padded alicorn sheepishly confessed. "W-well... maybe I thought I felt something for a minute. But I was having so much fun that I didn't think about it," She looked up at her fellow alicorn. "Am I in trouble, Mommy?"

The alicorn with a majestic white coat reassured the padded princess. "Of course not, Twily. You just had an accident, that's all. Even big ponies have accidents sometimes. You know that, don't you?" She levitated her charge through the air, towards the changing table. "Come on, let's get you changed. You're already a bit under the weather as it is, let's not make it worse by making you stay in a used diaper," As she placed Twilight carefully upon the changing table, she then turned to Spike and Shining Armor, asking them. "How about you two? Do either of you need a change?"

Spike just sat down, suckling on his thumb again with that far away look in his eyes.

Shining, meanwhile, used his magic to check his own diaper. "I'm actually a bit wet," He admitted, blushing a bit. "I guess maybe I don't have as much control of my bladder as I thought I did. But I can wait until you're done changing Twily. Cadence made sure to powder me quite thoroughly before she let me go." He demonstrated the fact by shaking and wiggling a bit, causing some of the excess foal powder to spill out.

Celestia smiled. "That's my niece for you. I guess it shouldn't have surprised me that she would marry a big foal at heart. And I'm sure Flurry Heart would adore having you as a playmate." Then she went about changing Twilight into a clean diaper.

Shining Armor could only reply. "Well, I'll think about it and talk it over with Cadence. But if you ask me, I think she's the one who could use a break. I know you put her back into diapers once already, but if you ever do it again let me know. It might actually be just the thing to help us rekindle our relationship. Right now it kind of feels like we're just going through the motions."

"Duly noted," Princess Celestia vaguely replied. "And I understand, you've both been very busy. But I think you're excellent parents to Flurry Heart. I know she'll turn out just fine. That hasn't changed just because you sometimes need a break. Even Mommies and Daddies need their me time sometimes."

The stallion turned colt nodded. "Yeah, that's kind of what we have Sunburst for. But he has a life too."

"True, true," The sun princess agreed as she then levitated Twilight off the changing table. "We can discuss it more later on if you'd like. For now, you and Spike still have some time left to spend with Twily."

Just then, an audible rumble filled the air. All eyes turned towards its source, which turned out to be none other than Spike himself. "Hungry." He said as he put a claw to his stomach.

"Come to think of it," Shining put a hoof to his chin. "It's certainly been a while since I've had anything to eat," He proceeded to ask the elder alicorn mare. "What's on the menu for today?"

Celestia smiled and flashed a knowing wink. "Can I trust you all to stay here and stay out of trouble while I go fetch some num-nums?"

The scrawny colt gave a reassuring nod. "Uh-huh, we'll be good, Mommy. Scout's honor!" He gave a small salute, raising a hoof up to his forehead.

Princess Celestia couldn't resist letting out an "Aw" when she saw Spike imitate Shining's gesture in a somewhat clumsy fashion. Still, she was satisfied with the response and lit up her horn, quickly teleporting away.

The alicorn mare with a majestic white coat returned to the bedroom a moment later with a large snack tray held within the soft glow of her horn. She moved to set it down on the table, and as she did so her eyes beheld a most adorable sight.

Twilight and Shining Armor, together with Smarty Pants and Brutus Force had managed to build a fairly magnificent little city of blocks. A city that was partially in ruins now.

The destruction turned out to be caused by Spike, who was stomping and thrashing about, knocking aside blocks without fanfare. Or at least he was, until Twilight, Shining, and their plushie friends all tackled Spike from behind.

The little dragon quickly rolled onto the floor, laughing, squirming, and kicking about. But he was unable to prevent his tummy from being bombarbed by a series of tickles, which made him howl with laughter.

As adorable and heartwarming as the scene was, it couldn't last forever. Princess Celestia broke it up by clapping her hooves in approval, making everyone aware of her presence and the snacks she had brought with her.

Twilight seemed to frown a bit when she saw that the snacks consisted of healthy things like carrots and celery sticks, as well as some mashed up apples. "Can't I have cookies, Mommy?" She asked in a pleading tone of voice.

"Cookies!" Spike licked his lips in eager anticipation.

Celestia forced back a laugh as she told her charges. "I'm afraid not, little ones. Especially not for you, Twily. You need your nutrition."

Shining Armor, meanwhile, eagerly rushed over to the snack tray and picked up the carrots! He began chomping away at them, saying in between bites. "Baby carrots, my favorite!" He didn't seem to care at all for how noislly and sloppily he was eating.

Twilight and Spike quickly overcame their initial disappointment about the lack of cookies as they trotted over to join Shining at the table. The fruits and vegetables tasted quite delicious (not as delicious as cookies, mind you, but delicious all the same).

By the time all was said and done, the three Sparkle siblings had gotten crumbs all over their faces as they sat there at the table with full bellies.

Princess Celestia just playfully retrieved a rag and wiped her charges' faces without saying a word. Then, afterward, she exposed her teets. "How about some milk to wash down your snacks?"

Shining immediately latched onto one of the exposed teets and started suckling without hesitation. He shut his eyes, suckling almost on instinct. Then, as he softly murmured, an audible hissing sound could be heard as his diaper now swelled up considerably, growing damper by the second.

Twilight adopted a goofy grin as she remarked. "I always thought my other mommy was joking, but it looks like she was true: Shining always wets himself when he's breastfeeding."

"Milkies." Shining Armor lisped. He didn't seem to realize, let alone care that his bladder was fully emptying itself into his diaper, which looked like it could only barely hold itself together. Fortunately, the hissing finally stopped just as he finished nursing. And afterward, he didn't fuss or protest in the slightest as he was lifted up by Princess Celestia and held over her lap. A few quick pats was all it took to make him belch quite audibly, before his eyes started to grow heavy.

Spike and Twilight found that they were much the same. A little bit of nursing and a quick pat from the sun princess, and they could barely keep their eyes open. They yawned, alongside Shining. And before they knew it, they were all fast asleep, snoring loudly.

Shining Armor woke up sometime later to find himself and Spike asleep within the same room in the Crystal Empire. It was the bedroom Shining usually shared with his wife, and which thankfully was very close to Flurry Heart's nursery in case of an emergency. Looking down at himself, he was a bit dismayed to see that he was back to being a full grown stallion, and even the sized up diapers Cadence had given him no longer fit him. "Oh well," He sighed to himself as he got up and shook the cobwebs from his mind. "It was fun while it lasted, right, Spike?"

Spike yawned, opening a sleepy eye. "Yeah, it sure was," He then walked over and gave Shining a hug. "Thanks for agreeing to do this with me. You really didn't have to."

The stallion sincerely replied. "Hey, it's what brothers are for. If it means going back to diapers for Twily's sake, I'm more than happy to play the part. Besides," He added. "I really meant it when I said I could use a break. Flurry Heart is adorable, but she's also quite a hoofful. I thought I was ready for fatherhood when she came along, yet it seems like every day she surprises me with something."

"Well for what it's worth, you and Cadence seem to be raising her just fine," Spike encouraged. He then looked around. "So, it looks like we still have some time together. I don't think I'm needed back in Ponyville just yet since Twilight is still on her 'extended leave of absence'." He delivered the last line with a knowing wink.

"Good," The familiar voice of Princess Cadence called as she came trotting into the room. "It sounds to me like you two had a fun day with little Twily," In an exaggerated tone of annoyance, she remarked. "Meanwhile, I had to manage Flurry Heart, hold court, and deal with rumors about changelings in the empire all by myself."

"Sorry, Cadence," Shining Armor sincerely apologized as he trotted over and nuzzled his wife. "How about I take over watching Flurry Heart for you while you spend a day doing what you want to do?"

The crystal princess questioned. "Honey, are you sure that's wise? We all know how well your first attempt at foalsitting Twilight went."

The stallion with a snow white coat reassured his wife. "Relax, hon. This time I'll have Spike the Brave and Glorious to back me up. And don't you think it's time Flurry Heart spent some quality time with her Uncle Spike?"

Cadence seemed to relent. "Well... I suppose..."

Satisfied with the response, Shining kissed his wife on the forehead and gently told her. "Then it sounds like we have a deal," He turned to Spike. "Come on, Spike, let's leave Cadence to enjoy her day off. I think we can let her have the whole castle to herself."

"So we're gonna take Flurry Heart outside with us?" Spike questioned.

Shining Armor nodded. "Why not? I think any changeling would think twice before trying to mess with Spike the Brave and Glorious."

Limey (Limestone Pie)

Author's Note

Limestone had the most votes (only one vote this time around named anypony else), so she's the star of this chapter.

Inspiration once again comes from Scootabom1, who proposed that Limestone be regressed, have a lisp, and be grabby. And he proposed somepony being disciplined, but leaving it up to me whether or not Twilight would also be disciplined. He did suggest Marble Pie also be present and not be regressed, but he is the only one who mentioned Marble Pie when voting for Limestone. And before that, Limestone and Marble had been mentioned together only once, indirectly. Lastly, he suggested that Limestone apologize when the regression wore off.

As a result, this chapter will contain disciplinary spanking in addition to the usual fetish content. Again, it is not meant to be sexual, the sex tag is there solely as a precaution because it was in the original fic. In a way, this chapter is a lot like the Rainbow Dash chapter from the original fic, which also contained spanking (among other things).

Voting is back to its regular schedule of a month from when the chapter is published. I will inform you if the date changes.

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family

Characters previously voted on:
Derpy, Marble Pie - One vote
Sassy Saddles, Fleur, Princess Celestia - One half vote

Limey (Limestone Pie)

Twilight was a little bit surprised when she woke up one morning in her bedroom, and found that Princess Celestia was nowhere to be seen. Twilight was still in her diapers, so it wasn't like her fellow alicorn to just leave her unattended. Something had to be up.

Feeling a tad bit scared and concerned, Twilight nevertheless threw back the covers of her bed, sat up, and climbed out. Hopefully, whatever it was that was keeping Princess Celestia preoccupied would resolve itself soon. Twilight couldn't wait to spend time with her "mommy" again. She didn't think there was anything wrong with that, it was just a role she was playing, one that her fellow alicorn was happy to support and encourage. As long as it stayed between them and ponies in the know, that was fine. Besides, since when was there a rule or a law that said princesses couldn't wear diapers?

The padded princess waited, and waited, and waited some more. She waited as patiently as possible under the circumstances. Yet even though time passed, there was still no sign of the sun princess, and no indications as to her whereabouts. Twilight naturally began to worry, levitating Smarty Pants over and talking to the old doll. "Smarty Pants, do you think Mommy is okay? She's never been this late before."

"I don't know, Twily," Smarty Pants replied in a somewhat anxious tone. "Maybe she overslept? Or maybe she's in the little filly's room using the potty?"

"Nah, that can't be it," Twilight protested. "Besides, there's a potty right here in my bedroom. Mommy could just use that, and that way I'd know where she was," She began to whimper ever so faintly. "What if Mommy's forgotten about me? She's been so busy lately."

Smarty Pants tried to reassure the padded princess. "Twily, that's ridiculous. Mommy could never forget about you. I've seen it with my own eyes the bond you share with her."

Whimpering softly and fighting back tears, the diaper wearing alicorn questioned aloud. "Then where is she, Smarty Pants? I want to go look for her. But I don't want everypony in the castle to see me wearing diapers, they'll all make fun of me for sure. They'll start spreading rumors about me. My whole life will be ruined!"

Fortunately, it was at that very moment that Princess Celestia finally appeared. Upon seeing the concerned look on Twilight's face, she unfolded her wings and trotted forward, draping them over her fellow alicorn as she spoke softly and sweetly. "It's okay, Twily. I'm here now. Mommy is sorry if she made you worry. She didn't mean to."

"That's okay, Mommy," Twilight replied as she leaned fully into the wing hug. "I know you must've been busy. I'm just glad you're not hurt or lost or anything like that," She then proudly presented her diaper. "And look, Mommy! I'm still clean! I haven't gone pee-pee or poo-poo yet! Isn't that great?!"

The sun princess smiled and nodded, showering Twilight with only slightly exaggerated praise. "Yes that is, Twily! I'm proud of you for putting so much effort into that! But you know that I will still love you even if you use your diapers for number one and number two. I will always love you no matter what, Twily. That's what a mommy is for."

"Hey, don't forget about me, Mommy!" Smarty Pants spoke up. "I've been with Twily too. Wherever she goes, I go."

Princess Celestia chuckled ever so faintly. "Of course I haven't forgotten about you, Smarty Pants. You're there for Twily even when I can't be. I will always be grateful for that."

Twilight then asked. "So, what took you so long, Mommy?" With a concerned look on her face and a concerned tone in her voice, she reluctantly inquired. "Is something wrong in Equestria? Is it some important event that needed planning or scheduling?"

The alicorn with a majestic white coat shook her head from side to side. "Oh no, it's nothing like that, Twily. If it was, I would make sure you knew about it," She turned her attention back to the bedroom door. "It's just that..." She hesitated, apparently trying to think about how best to frame what she was going to say next. After a moment or so of silent contemplation, she continued. "-Your next playmate proved to be more difficult than I had anticipated." And as soon as she finished saying those words, she lit up her horn and opened the bedroom door, quickly ushering in the aforementioned playmate.

It was an earth pony mare with a bluish gray coat, opalish gray mane and tail that hung flat against her sides, moderate amber eyes that seemed to have a far away look in them, and a cutie mark depicting a lime between two rocks that was faintly visible through the diaper she was wearing. "Hi, Twiwy." The mare spoke, lisping slightly in a tone of voice that still sounded gruff. It was possible to see a faint bit of drool escaping her lips.

Princess Celestia explained. "Twily, this is Limestone Pie. But you can call her Limey. As you can clearly see, she's been regressed to the mindset of a foal. I had to do it rather heavily, because she was being very fussy and uncooperative about the whole experience. I hope that she won't be too much trouble for you."

"Of course not," Twilight insisted. "But why did you choose her, Mommy? Marble was the one who got put back into diapers, Limey was the one who teased her about it."

The sun princess struggled to suppress a goofy grin. "Precisely why I felt Limey here could benefit from spending some time with you. She most certainly could use a break from all her big pony responsibilities. They were putting so much stress on her."

Limestone made a face and stuck out her tongue. "Aww wowk, no pway. Mommy and Daddy no fun at aww."

The padded princess giggled. Just like when Rarity had been mentally regressed, she knew that this sort of infantile behavior from Limestone was something she would probably never see again. And from what Pinkie Pie had told her, Limestone could be very grumpy and very bossy. So perhaps a bit of time spent back in diapers and freed from all the burdens and responsibilities that came with being the eldest sibling would help.

Once satisfied that Twilight was onboard with her new playmate, Princess Celestia took the liberty of asking. "Alright, my little ponies. What would you like to do first today? I know nopony needs a diaper change, so we can rule that out for the time being."

As if in answer to the elder alicorn's question, both Twilight and Limestone heard their stomachs grumble and rumble quite audibly. Limestone even took the liberty of babbling. "Hungy. Feed me!" And she said in a noticeably demanding, impatient tone of voice. It seemed that her fussy attitude hadn't been completely taken away in spite of her mental regression.

"I'm hungry too, Mommy." Twilight spoke up in a considerably nicer tone.

The sun princess nodded. "Alright then, breakfast it is. Come with me, my little ponies, and we'll see what delicious num-nums are on the menu for today." Taking hold of her charges by the hoof, she lit up her horn and teleported them to the royal dining room, which was (of course) void of other ponies.

Twilight and Limestone were soon placed into chairs adjacent to one another, their padded rears crinkling audibly as they sat down. Smarty Pants sat off to Twilight's left, waiting patiently.

Princess Celestia was quick to tie bibs around the necks of both padded mares, then she disappeared into the kitchen for a moment or two. When she returned, she brought with her shiny plates piled high with sweet, savory pancakes. The aroma of them wafted through the air, making both Twilight and Limestone's mouths water. The pancakes themselves were topped with syrup, butter, and whipped cream, which made them look absolutely tasty and tempting.

As soon as the plates were set down, Limestone eagerly reached out a hoof to try to grab them. "Mine!" She shouted!

Celestia carefully repelled Limestone's grabby hooves with her magic. "Ah ah ah, Limey," She lightly scolded in a playful tone. "You have to wait for Mommy to cut up your pancakes first. That's how it works," And she turned to Twilight. "Twily, don't you get any ideas either. I know I taught you better than that."

"Uh-huh, Mommy. I'll be good." Twilight promised. To demonstrate this fact, she sat upright in her chair and did not move in the slightest. It was hard to do so, the pancakes looked so delicious. But the rules were the rules. She had to wait until they'd been cut up and offered to her.

The alicorn with a majestic white coat and a multi-colored mane then used her magic to cut up the pancakes on the plate, until they were reduced to small squares full of syrup, butter, and whipped cream. She then sat across from the padded ponies in her presence, carefully pushing the plates towards them whilst using her magic to hold up a plastic fork. "Open wide for the choo-choo train!" She cooed, presenting the first cut of pancakes to Twilight, perhaps in the hopes that she could get Limestone to see how the proper way a foal was to behave.

The younger alicorn obeyed the command and opened her mouth as wide as she could. She was rewarded for her efforts when the portion of pancake was deposited into her mouth. She started chewing once the fork was removed, delighting in the taste that nearly overwhelmed her taste buds. "Oh boy, chocolate chip! My favorite!" She exclaimed as her eyes went wide! "Thank you, Mommy!" She said in between bites.

Princess Celestia playfully chuckled. "Twily, don't talk with your mouth full."

"Sorry." Twilight apologized, turning a faint shade of pink in the process.

"Haha!" Limestone pointed and laughed, kicking all about. She seemed to find the scene hilarious.

"Hey, don't make fun of Twily! She couldn't help herself! Those pancakes were really good!" Smarty Pants protested to Limestone.

The regressed earth pony mare ignored the doll. She instead turned to her own plate of pancakes, the look and smell of them becoming more irresistible by the minute.

Sure enough, before Princess Celestia could turn and start feeding Limestone, Limestone started digging into the pancakes with her bare hooves. Crumbs flew everywhere as she smeared the syrup, butter, and whipped cream all over her face. She devoured pancake slice after pancake slice quite audibly, and without the slightest care for table manners. When she was finished, she leaned back in her chair, patted her stomach, and let an audible belch. "'Scuse me." Then she licked her lips, trying to get the traces of syrup, butter, and whipped cream that stuck to her cheeks.

"My goodness!" Celestia exclaimed in what sounded like only slightly exaggerated shock. "Just look at the mess you made, Limestone!" She summoned up a wet rag with her magic, and began using it to try to clean the earth pony's face. It was a task made difficult by the fact that Limestone didn't want to cooperate. Try as she might, the sun princess could only get a tiny bit of syrup, butter, and whipped cream removed. At last, with a frown, she turned back to Twilight and declared. "Once I've finished feeding Twily, I'm going to have to give you a bath, little Limey. I can't leave that stuff to get stuck on your face all day."

Limestone, for her part, just giggled. Her attention was focused on playing with her hooves and her padding. She seemed to find the whole thing amusing.

Fortunately for Twilight and Celestia, the padded alicorn was much more cooperative when it came to feeding. By the time her plate was empty, only a few small crumbs remained plastered on her face. And they were easily removed with a single wipe from a wet rag.

The now empty dishes were floated back into the kitchen to be cleaned out and put away, and then Princess Celestia gave her full attention to the still very messy earth pony in her presence. With a great deal of effort, she floated Limestone into the air and held her close. "Alright, Limey, let's get you cleaned up."

"Please, Mommy, can I have a bath too?" Twilight pleaded with puppy dog eyes.

The sun princess resisted the eyes and replied. "Maybe later, Twily. Right now, I need to get Limey all cleaned up before all that stuff sticks to her face. You're welcome to stay by my side and watch. You can even help me clean her up if you'd like."

But Twilight shook her head from side to side. "Nah, don't wanna."

Celestia just sighed. "Alright, then I don't wanna hear any complaining about how long it takes," She began to carry Limestone off. "I'm definitely going to have my work cut out for me," Trotting back to Twilight's bedroom, she said to her fellow alicorn. "Just stay here and don't run off. And if you need anything, Twily, let me know." Then she trotted into the bathroom, turned on the lights, and began filling up the tub with warm, soapy water.

Twilight waited and waited, pacing the floor and shuffling back and forth on her padded posture. She could hear the sound of running water from the bathtub, the sound of splashing hooves as Limestone was deposited into the tub and started making a fuss, and the sound of furious rubbing and scrubbing as Princess Celestia tried to get the regressed earth pony fully cleaned.

It seemed to take ages, the minutes ticking by in agnoizing slowness. Surely, Limestone hadn't made that much of a mess of herself, had she?

At last, the long wait was over. The padded alicorn's trained ears could pick the sound of water being drained, signaling that the bath for Limestone was ending. Yet it was then that she heard an audible "Pfft!", followed by giggles and a playful, mischievious voice saying. "Heh heh, I pooted."

A minute or so later, and Limestone emerged from the bathroom with a clean face and a spotless diaper. She still had that cheeky grin plastered on her face, apparently finding the whole thing amusing.

Princess Celestia, for her part, looked frazzled. And it really didn't seem to be an act. "Limey is being quite the hoofful today, it seems."

Twilight waddled up to her fellow alicorn, nuzzling her in the side. "It's okay, Mommy. You still have me, and Smarty Pants. We won't be naughty for you. Will we, Smarty Pants?"

"No we won't!" Smarty Pants firmly insisted. "We'll be the best little foals ever for you, Mommy!"

The alicorn mare with a majestic white coat smiled ever so faintly. Such affection and promise seemed to ease her nerves a bit. "That's good. I know you both mean it," Then she used her magic to pull Limestone close, all the while exposing her teets. "Now then, how's about some milk to wash down those pancakes? I have to make sure my foals are getting their nutrition."

Limestone wasted no time in latching on to the first teet she could lay eyes on! "Mine!" She shouted again, practically biting down on it in the process.

Celestia let out a yelp. "Careful, Limey! Not so hard! That's a very sensitive area."

Undeterred, the earth pony mare just started suckling. She was suckling so fast, it was a miracle she remembered to breathe. It was almost as if she viewed the whole thing as a competition, and was trying to hoard all the milk to herself.

The padded princess, for her part, suckled much more gently and much more slowly. She was confident that there was more than enough milk to go around. And she closed her eyes, concentrating on her fellow alicorn's steady heart beat while timing her suckles to the rhythm. It tasted just as sweet as it always did.

In a matter of minutes, both padded mares had their bellies filled to the brim with milk. And it was of great relief to them that they were floated up and patted on the back repeatedly by Princess Celestia afterwards. Twilight almost thought she was going to spit up from how full she was, but was greatly relieved when she just belched instead. The full feeling in her tummy slowly settled, allowing her to be set back down.

With the breast feeding complete, Princess Celestia plopped her posture down into a chair and brought a hoof up to her forehead. "I think I need to rest for a little bit," She told her charges. "You two just stay here and play nice. There's plenty of toys for you both." She promptly gestured a hoof to an oversized toy chest resting off in a corner of the bedroom.

Upon seeing the toychest, Limestone's eyes went wide with wonder! She immediately rushed for them at a speed that could've rivaled Pinkie Pie's or Rainbow Dash's! "Toys!" She exclaimed again and again!

Twilight trotted towards the toy chest as well, but at a much slower pace. As excited as she was at the prospect of playtime, she was still feeling a little full from the pancakes and the breast milk. There was no doubt about it, she had overindulged. But she couldn't help it, the pancakes and the milk had tasted so sweet. She hadn't wanted to stop, even after her stomach had tried to get her to do so.

That didn't deter the regressed earth pony mare with a bluish-gray coat. Perhaps she was used to eating bigger meals, or perhaps she just had a faster working digestive system. Whatever was the case, she all but dove into the toy chest, grabbing as many different toys as she could lay eyes on. "This mine! That mine too!" She lisped, holding every toy she grabbed close to her chest. "Tey aww mine!" One could easily have mistaken her for a greedy dragon building a hoard.

The padded princess simply took possession of whatever toys Limestone didn't want or couldn't get her hooves on. Luckily, there were still some alphabet blocks and a few plushies left at the bottom of the chest. It was better than nothing. Looking to Smarty Pants, she quickly got an idea. "Let's have a tea party!" She said to the old doll.

"What a great idea, Twily!" Smarty Pants eagerly replied. "A tea party's always better with more guests."

"Uh-huh. You're so smart, Smarty Pants!" Twilight cooed as she hugged the doll tightly.

Smarty Pants playfully giggled. "That's why they call me Smarty Pants, Twily. Now come on, help me get the table and chairs set up for our guests. They'll be here soon!"

The diaper wearing alicorn thus went about arranging the alphabet blocks in a small circle, spacing them apart so that they loosely resembled chairs. Once she placed the last block, she set all of the plushies down on top of them one by one, and then placed Smarty Pants on one of the two remaining blocks.

But as Twilight moved to sit down in her own chair, she felt it be suddenly yanked away from her by her fellow padded mare. "Mine!" Limestone shouted, sticking out her tongue and swishing her tail.

"Hey, give that back!" Twilight cried as she fell upon her padded posture, relieved that it had cushioned the impact.

The earth pony mare refused to obey, instead replying. "Nu-uh, tis mine! Ya can't have it!" And she held it high above her head, almost as if she were taunting the padded princess.

The alicorn princess thus complained. "You're being mean, Limey! Stop it!"

Limestone didn't seem to care in the slightest. "Not giving it back!" She lisped in protest and ran off with it, carrying it across the room to her huge pile of toys. She wasn't really playing with any of them, she just seemed to have wanted solely for the sake of having them.

"You already have enough toys! You're not being fair!" Twilight started to whimper. Playtime with Limestone was starting to not be very fun at all. Lighting up her horn, she tried to take one of the other toys from the pile, hoping to maybe use it as part of a trade or a negotiation.

The regressed earth pony mare refused to part with any of her toys. Whenever she saw one being taken away from her by magic, she lunged for it and grasped it firmly in her hooves, refusing to let it go. "Is mine! I no wanna shawe with you!" She protested with a growl, even briefly bearing her teeth. The regression had apparently made her possessiveness and clinginess even worse. Twilight was starting to feel bad for the other Pie sisters, all of whom surely had had to put up with such behavior on their rock farm.

Princess Celestia, meanwhile, could hear the arguing back and forth. And because she had been trying to rest and relax, the noise sounded that much louder than it otherwise might have been. Yet she didn't want to get up from the chair she was sitting in, she still felt exhausted. So instead, with a disapproving glare and a harsh frown, she spoke to the padded ponies. "Now now, my little ponies. Play nice. Don't make me separate you two."

"But Mommy, Limey's not sharing!" Twilight whined. "She's being a poopy head!"

"Nu-uh! Twily not weaving me awone!" Limestone complained. "She the poopy head!"

Celestia sighed deeply. "I don't care who's fault it is or who's doing what. You two need to learn how to share and get along," She then warned. "If I have to get up from this chair and come over there, there will be consequences. I'm not going to warn you again: Play nice, or you'll force me to take drastic measures."

At that the padded princess froze and her eyes shrank. Though faint, she could recall what had happened the last time she'd angered the sun princess to such a degree. She had been disciplined very harshly, her rump had been sore for almost an entire day afterwards. She dared not risk it happening again.

If Limestone was bothered by the threat, she didn't show it outwardly! She just laughed as she continued to guard her large pile of toys! "Mine! Aww mine! You can't have it!" She insisted with narrowed eyes. Then she happened to notice Smarty Pants resting on the ground near the other plushies. Immediately, she lunged for it and grabbed hold of the doll by one end.

Twilight wasn't about to let Smarty Pants go, not without a fight! Lighting up her horn, she grabbed Smarty Pants by the other end and tugged as hard as she could! "NO!" She screamed! "Smarty Pants isn't yours! You have enough toys already!"

"Want Smawty Pants! Give hew!" Limestone growled, biting down on the doll with her teeth and digging in her hooves.

With eyes narrowed and teeth gritted, the diaper wearing alicorn just increased her magical hold. She forgot all about anything else, let alone the fact that Smarty Pants was extremely delicate (Big Macintosh had done a pretty good job of sewing the old doll back up, but there were still seams that were very easily exposed with the right amount of tension). "No!" She protested.

And so the arguing went back and forth, the two padded ponies pulling on opposite ends of the old doll as they each tried to claim it only for themselves. All the while they shouted to each other "Give me!" and "No!" over and over again!

Suddenly, the argument was abruptly halted as a bright yellow glow took hold of Smarty Pants in her entirety and lifted her so high into the air that neither Twilight or Limestone could reach it. "That's quite enough, both of you!" A very stern, disapproving tone of voice rang out, echoing throughout the entire bedroom and filling both padded mares with a sense of dread. Now standing before them was the visibly irritated form of Princess Celestia, who did not seem amused in the slightest.

Twilight eeped, accusingly gesturing a hoof! "Mommy, it's not my fault! It's all Limey's fault!"

"Nu-uh, is Twiwy's fauwt!" Limestone protested, lacking any better argument.

Celestia just frowned and scowled. "I specifically warned you two what would happen if you didn't stop fighting. I asked you nicely to get along. And you disobeyed me. You're both at fault, and you're both going to be punished for this. You two should know better than to fight over a doll."

Even though she was certain she knew what was coming, the padded princess still hesitantly and nervously asked her fellow alicorn. "W-what's going to happen to us, Mommy? What are you gonna do?"

The alicorn mare with a majestic white coat sighed deeply even as her overall expression did not change. "What any mommy does when confronted with naughty foals who don't listen to her," She carefully floated Smarty Pants over to a huge shelf and turned the doll so that its back was showing to the foals. "I've made sure Smarty Pants can't see what's going to happen. Don't either of you try to run away from this. You must be punished. And then you're both going to sit in time out and think about what you did wrong."

Twilight shuddered with visible horror. She couldn't believe she was about to be disciplined again. "P-please, Mommy! I'm sorry! I won't do it again!" She pleaded.

Princess Celestia could only shake her head in disapproval. She would not be deterred or persuaded otherwise. "I'm sorry, Twily. Believe me, this hurts me as much as it's going to hurt you. But it has to be done. It's the only way I can make sure you'll learn your lesson," She promptly sat down on a stool, motioning first to Limestone. "You're first, Limey. You made this disturbance, so you are going to receive a harsher punishment."

"Ya not the boss of me!" Limestone stuck out her tongue in defiance and tried to run away! She couldn't get far, however. As strong as she might be, she was no match for Princess Celestia. Wiggling, squirming, and kicking in protest, she was brought before the princess and had her diaper pulled down, exposing her bare bottom.

"Turn around please, Twily." Celestia instructed. And she waited until her fellow princess had obeyed before carrying out the punishing of Limestone. She swiftly brought her hoof down upon the earth pony's rump, smacking it hard! Then she did it again, and again, and again. Swat after swat followed, causing Limestone's rump to become red. But it seemed to provoke no reaction at all within her. That is, until the final swat from a hoof was brought down. This one landed with what seemed like an especially painful smack, either because it had hit a particularly sensitive spot on the rump, or because the rump as a whole had already taken quite a beating.

There was silence for a moment, then a faint sniffle. Within seconds, the mighty Limestone Pie had been reduced to tears. And as her eyes were stained red from the constant crying, her padding was pulled back up and she was floated over to a small stool nearby to sit upon. She was made to face a corner of the bedroom, her still sore bottom the only thing anypony could see.

But Twilight knew better than to laugh or take any pleasure from the earth pony's punishment. Especially when the padded alicorn knew that she was going to be subjected to a similar fate. Even though she knew it was futile, she tried to make a run for it. It of course accomplished nothing. Like Limestone before her, she was brought before the sun princess and had her diaper pulled down. She then saw Celestia raise her hoof into the air, ready to bring it down hard upon Twilight's rump. "W-wait, Mommy!" She whimpered in protest. "I... I..." She managed to force out! "I have to use the potty, now!"

Princess Celestia just replied. "I'm not going to fall for that, Twily. You're not getting out of your punishment." And she began to spank Twilight repeatedly. Unlike with Limestone, she didn't have to work as hard or as long to reduce the padded pony in her presence to tears, let alone turn her whole rump red. "You should've just come and gotten me, Twily. I know I didn't respond right away to Limestone's behavior. But fighting her over it is still wrong. Two wrongs don't make a right. I know how much Smarty Pants means to you. And had you come and gotten me instead of fighting Limestone, we could've resolved this whole thing without anypony needing to be punished like this. Do you understand?"

"Y-yes, Mommy!" Twilight sniffled as the swatting ceased and her padding pulled back up over her posture. It was a good thing that happened, because within seconds she felt her tail hike upwards. And with an audible fart, her diaper sagged and began to bulge in the back, a powerful stench of manure filling the air. She couldn't believe it: She was actually messing herself in front of Princess Celestia!

"Oh, Twily!" Celestia exclaimed as the sour note reached her nostrils. "You really did have to go, didn't you?"

The stinky alicorn sobbed, whimpering softly. "Y-yes. It happened so fast. I tried to stop it, Mommy. Really, I did."

The sun princess just gently stroked Twilight's back, trying to calm her down and comfort her. "It's okay, Twily. You couldn't help it. As I've told you before, it's not healthy to keep things held in. If you have to go, you have to go. That's why you have a diaper. It's great that you want to try to use the potty for me, I appreciate that. But I don't want you forcing yourself not to go if you really have to go," She then floated the alicorn in a dirty diaper into the air. "Let's get you cleaned and changed before you get a rash."

"Does this mean I don't have to sit in time out?" Twilight asked in a hopeful tone.

The alicorn mare with a majestic white coat shook her head from side to side. "I'm afraid not, Twily. You still disobeyed me, and you still need time to reflect on why that was wrong. But that can wait until after we've changed your diaper."

Despite how sore her rump was from the spanking, Twilight was still very glad to be changed into a fresh diaper. It didn't make sitting on a stool and facing towards a wall for time out any more bearable, though.

Princess Celestia, for her part, could only reflect on the behavior she had witnessed from her fellow alicorn. "I know Smarty Pants meant a lot to Twilight, but there's no reason for her to have fought Limestone over it the way she did," She thought to herself. "Perhaps I should have another talk with Luna, just to make sure she hasn't noticed something else troubling. Twilight's behavior is mostly just her acting the part, right?"

Well, those were thoughts for another time and place. For now, the sun princess kept a watchful eye on the two padded ponies in her presence, making sure neither of them tried to run away or otherwise get out of their punishment. At last, she was satisfied that both had had quite enough time to reflect on their behavior and where they had gone wrong. "Alright, my little ponies," She said in a sincere and somber tone. "Time out is over. You can both get up now," And as she watched them do so, she asked them. "Is there anything you'd like to say?"

With cheeks still flushed pink with embarrassment, Twilight apologized. "Yes, Mommy. I'm sorry we fought and didn't listen to you."

And Limestone apologized with what sounded like sincerity. "I sowwy fow being bad. Not nice, won't do it again."

Satisfied with the response, the sun princess sweetly declared. "Good. See? That wasn't so hard to say, was it?" She then floated Smarty Pants down from the tall shelf she'd been placed upon. "Now then, if you both promise to share and play nice, you can have Smarty Pants again," To Limestone she added. "And Limey, you have to remember to ask Twily first. Smarty Pants was hers to begin with."

"Play nice with me, please!" Smarty Pants pleaded. "I'm very sensitive, really."

"Sowwy, Smawty Pants," Limestone Pie apologized. "I pwomise I'ww pway nicew with ya."

Twilight smiled, clutching the old doll close to her chest. "I'm just glad you're okay, Smarty Pants."

"Sorry if I made you worry, Twily," Smarty Pants replied. "And I'm sorry you got into trouble because of me."

The padded princess just protested. "It was my fault. I shouldn't have been trying to fight," And she was quick to change the subject, asking the old doll. "Whaddya say we get back to our tea party? We never actually got to make the tea."

And the regressed earth pony mare sheepishly asked. "Can I join? Me wanna pway with ya and Swamty Pants."

With a goofy grin and a giggle, Twilight giddly proclaimed. "Oh of course you can join us, Limey. There's always room for more guests at our tea party." And she shuffled away, Smarty Pants in tow, ready to start the pretend tea party with her new guest.

The tea party progressed without fanfare. Twilight took the liberty of introducing Limestone to all the guests who had been at the party previously (before it had been rudely interrupted). And they were all glad to have the earth pony mare among them to partake in the festivities.

Then, suddenly, right after the drinking of the imaginary tea, something unexpected happened. It seemed as if the far away look in Limestone's moderate amber eyes faded, and she stopped drooling. She shook her head from side to side and rubbed her eyes, as if she were just waking up from a long nap. Looking around the room, the earth pony mare with a bluish-gray coat seemed to be stricken with a sense of surprise and confusion. "...Where am I?" She asked as her lisp seemed to suddenly vanish.

Twilight looked to the earth pony mare with surprise. "What do you mean? You're here with me, Limey."

"Limey?" Limestone blinked, before looking down to herself and taking notice of what was clad firmly around her rump. She groaned and growled ever so faintly. "Ugh, really?!" She complained, turning her eyes toward Princess Celestia off in the distance. "Look, I know I was making a fuss about the diapers and everything, but you didn't have to go and regress my mind like that! You just told me it was going to help me relax!"

Celestia admitted with a bit of a snicker. "Well, it did, didn't it? It's not really my fault, I had to make the spell stronger because your mind was so resistive to the suggestions I was trying to implant. It seems almost as if you were trying to fight the very idea of going back to diapers."

The earth pony mare let out a sigh, sinking into her padding. "Yeah, I did. But can you blame me? I'm the oldest one among my sisters. I was supposed to be the first to master everything when it came to growing up. But Maud was the first one to get out of diapers, and the first one to master use of the flush toilet. And then Pinkie Pie ended up being the first one to leave the rock farm. Meanwhile, Mom and Dad more or less retired and left me to run the farm all on my own. I mean, I liked it, don't get me wrong. But why did it have to be me? Why couldn't it have been somepony else? Marble never put up a fuss about anything, and neither did Maud. Even Pinkie would've been happy to come back to the rock farm to help Mom and Dad out," She groaned. "But no... because I was the oldest and because I didn't leave the rock farm when I was supposed to, it all had to fall on my shoulders."

The padded princess let out a gasp! "Oh my gosh! I never knew it was like that! Whenever Pinkie Pie talked about your family's rock farm, she made it sound like your parents were nothing but supportive and understanding."

Limestone lamented. "Yeah, they were. At least when it came to what Maud and Pinkie wanted. I think Mom and Dad knew before they did that they weren't happy with life on the rock farm. Both of them felt like they had to grow up sooner than they wanted to. And it's all my fault they felt that way. If I hadn't been such a late bloomer in every aspect, Mom and Dad never would've had to rely on Maud to teach the rest of us how to use a flush toilet, or Pinkie to teach us how to laugh and have fun. Heck, Marble even lucked out and got to go back to diapers. I was so jealous of her because of it. It made me wish I could do the same. But of course, my body wouldn't cooperate."

Twilight trotted over, giving Limestone a hug. "It's okay, Limestone. Your parents aren't here now. And you're not the only one among your siblings who's wanted to go back to diapers. There's no reason to be a grump about it."

The earth pony mare sighed again, hanging her head in shame. "I know, I know. And that's not an excuse for the way I acted while I was regressed. I was a real terror back when I was a foal, especially before Maud and the twins came around. Having all the attention of the family, it felt so nice. I let it all go to my head, just like I let running the rock farm go to my head," She then turned to Princess Celestia. "You don't have to do anything nice for me, princess. I know I didn't behave myself as well as I should have. If you wanna tell Mom and Dad how I acted like a brat all day, you can," Her ears fell flat against her face. "I'll accept my punishment."

But the sun princess protested with a firm shake of her head. "Don't be silly, Limestone. You've learned your lesson, I can tell. If you hadn't, you wouldn't be apologizing now," And she added with a sincere smile. "I'd be more than happy to have a talk with your parents about giving you a break. It isn't right that they should place all their hopes onto you. You're just one pony. You should be allowed to have a life of your own."

"Hey, I like running the farm!" Limestone insisted! "Sure, maybe it can be stressful sometimes, and maybe I would've liked to have been given the choice. But somepony's got to do it now that Mom and Dad can't. It's just that..." She blushed. "Sometimes, even I can use a break from it all, you know?"

"Perfectly understandable," Celestia agreed. "Even I sometimes can grow tired of my responsibilities, as important as they may be. That's why I'll always be grateful to have Twily here to help me unwind," She trotted over to Limestone. "You're a very strong pony for putting up with everything for so long, Limestone. But it can take an even stronger pony to admit how they really feel. Just be honest with your parents when you feel like you can't handle your responsibilities on your own. I'm sure they will understand."

Sunshine Smiles (Princess Celestia)

Author's Note

Well, since the voters picked Princess Celestia, Princess Celestia it shall be. And since she's going to be diapered and babied alongside Twilight, that means somepony else has to be the caretaker. Guest caretakers can be allowed, as long as they are specified ahead of time.

As usual, it was Scootabom1, who proposed the idea of Princess Celestia being regressed physically, and using a spell to disguise herself and Twilight as actual foals, with Pinkie Pie as the caretaker.

In contrast to all previous characters voted upon, this is the only time I will allow Princess Celestia to be a playmate for Twilight for however long this fic remains active.

And even though physical regression and disguses are possible, I am still ruling out the usage of any school aged or younger characters as a playmate for Twilight. Since this fic does have a Sex tag (due to the original fic also having one), I don't want to get into any trouble for having underaged characters in situations that could be said to be "sexual" (Spike is allowed since his exact age is ambiguous).

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family)

Characters previously voted on:
Prince Blueblood - One and a half votes
Derpy, Marble Pie - One vote
Sassy Saddles, Fleur, Princess Celestia - One half vote

Sunshine Smiles (Princess Celestia)

Twilight had closed her eyes and was concentrating deeply, listening to the rhythmic heartbeat of Princess Celestia as she was held close to the sun princess' chest. The padded alicorn was currently in the process of breastfeeding as part of a bedtime snack. She tried to time her suckling on Celestia's teets to the rhythm of the older alicorn's heart, a process easier said than done despite how many times she'd already done this.

Princess Celestia, for her part, just gently stroked Twilight's mane and rocked her former student back and forth while humming softly to her. "That's it, Twily," She encouraged in that gentle, warm, motherly tone of hers. "Just relax and drink up. Mommy's here for you no matter what," Then she winced a bit as she felt a sudden (albeit brief) burst of pain. "Ooh, careful, Twily! Not so hard!"

"Sorry, Mommy." Twilight sincerely apologized as she briefly removed her mouth from Celestia's nipples. Then she yawned as the warm, creamy milk worked its way down her throat and started to make her feel drowsy.

The sun princess simply used her magic to float her padded charge over to the bed, tucking her in and making sure her trusted companion Smarty Pants was close at hoof. Then she approached the bed and kissed her fellow alicorn softly on the forehead. "Sweet dreams, Twily. See you in the morning." And after turning off the lights, she departed the guest bedroom in which Twilight was staying, smiling all the while.

Yet as Celestia was making her way down the hall to her own bedroom, ready to call it a night after another day spent in the role of Twilight's "Mommy", the alicorn with a majestic white coat couldn't help but start pondering to herself. She was thinking once again of what her sister Luna had told her about Twilight's mental state as laid bare through the dream realm. True, Luna hadn't voiced any more concerns after that, and Twilight didn't seem to be negatively affected. But all throughout, the sun princess had occasionally noticed some troubling behavior. It was all just an act though, right? Twilight was merely "getting into character" as it were?

So why did Princess Celestia suddenly find herself worrying so much about her fellow alicorn's mental state and whether their frequent roleplaying as mommy and baby was really for the best? Both were getting what they wanted out of it, were they not?

These concerns had cropped up before from time to time, but this time they seemed especially prominent and concerning for the sun princess. Thus, she sat at the edge of her bed upon reaching her private bedroom and began to think. How could she alleviate these worries? How could she convince herself that everything was fine and that she was worrying too much about nothing? She thought briefly about discussing this with Luna, but decided against it. If Luna hadn't noticed anything troubling since her initial comment a long while back, talking with her would be pointless.

"Think, Celestia, think," Celestia thought to herself as she rose from her bed and paced back and forth for a while, deep in thought. "How can I truly see for myself if Twilight is okay? How can I make sure she isn't becoming too attached to me?" Minutes ticked by as she pondered and contemplated, trying to think of the answer that seemed just out of reach. Then, suddenly, it dawned on her! The answer was so obvious!

And with her mind made up, Princess Celestia opted not to go to sleep just yet. She had to make some arrangements if her recent epiphany was to be put into action. Yet she knew that she wouldn't be able to fall asleep until she was certain everything would be worked out. That meant there were certain ponies she needed to speak with before the sun rose in the morning.

Next morning, when Twilight yawned and wiped the sleep from her eyes, she initially had no reason to believe anything was at all different. "Good morning, Smarty Pants." She greeted her old foalhood doll as she used her magic to levitate said doll up close to her.

"Good morning to you, Twily," Smarty Pants replied. "Did you sleep good last night?"

The padded princess firmly nodded and happily stated. "Yes I did! And now I'm ready for another day of fun with my mommy!"

"Well I'm happy to hear that, Twily, because I'm ready for an extra special day of fun with you!" The familiar voice of Princess Celestia greeted from somewhere nearby. Yet strangely enough, there was no sign of the tall, slender alicorn with a majestic white coat. That seemed most odd.

"Where are you, Mommy?" Twilight questioned as she sat up fully in her bed. Now she had her first real sense that something was off: Everything around her seemed a lot bigger than she remembered it being from the night before! The size change startled her, causing her to gasp! "Mommy, what's going on?! Why does everything look so much bigger now?! Why can't I find you?!"

Celestia snickered, before the alicorn appeared right next to Twilight. "Because, Twily, it's all part of my surprise. I hope you like it." And once she was beside Twilight, it was possible to notice two things about the sun princess: The first was that she was now wearing a thick, white diaper in much the same fashion as Twilight. And the second was that she now appeared to be almost the exact same height as her fellow princess.

Blinking slowly as the realization dawned on her, the padded alicorn let out a gasp! "Mommy, you turned us into actual foals?!"

The regressed sun princess nodded, smiling brightly as she did so. "Yes I did. I figured I could use a bit of a break. And having seen how much fun you've had with your other playmates, I figured 'Why can't I join the fun too?'"

"Why turn us into actual foals, though?" Twilight nervously asked. "Everything looks so much bigger now. I would've been happy to have you in diapers as you were, Mommy."

Princess Celestia blushed a bit, her cheeks turning a faint shade of pink. "I guess I thought it would kill the immersion if you were looking up at me even if I was in diapers. Sorry, it was kind of a spur of the moment decision on my part. It sounded like a good idea, though," Turning to her fellow alicorn, she questioned. "You're not mad with me because of that, are you, Twily? If you are, I can turn us back to normal right now."

Yet Twilight immediately shook her head and protested. "You always know what's best, Mommy. I'm just a little bit..." Hesitantly, she added. "Surprised by all of this, that's all. If you really think this is the best way to spend time with me, I'll go along with it," She chuckled. "I guess that means now you're more of a big sister to me, like with my other mommy."

Still blushing a bit, Celestia gave off a nervous laugh. "...Yes... I... suppose I am. Not being the mommy is going to take a lot of getting used to. That's why I'm hoping you can teach me how to be the best foal I can be on my day off!"

Smarty Pants, meanwhile, saw fit to ask. "So, if you're not going to be Twily's mommy today, who's going to take care of us? And who's going to be doing all the grown-up things you usually do Mo... I mean big sis?"

The regressed sun princess regained her earlier cheerful persona as she answered. "Well, I made sure to clear everything with the castle staff and with Luna. They all agreed that Luna can manage my usual responsibilities for today, in exchange for me helping her with her duties at night. And as for who I got to look after us and make sure all our needs are taken care of..." She turned towards the bedroom door. "That pony should be arriving just about... now!"

As if on cue, the bedroom door swung open in dramatic fashion! And who should come literally bouncing in but Pinkie Pie herself in all her party pony glory?! "Tada!" She cheered as confetti burst out from between her hooves! "Here I am at last: Pinkie Responsibility Pie, the best foalsitter there ever was! Just ask Pound and Pumpkin Cake."

"Pinkie?!" Twilight gasped in surprise as she saw how much bigger the pink party pony seemed to be now! "Mo... er big sis asked you to be the caretaker?!"

Pinkie happily nodded. "Yes indeedy, little Twily," She kneeled down and eyed the regressed alicorn, then cooed. "Oh, and aren't you just the cutest little thing ever?! I could just eat you up, you're so cute!" And she proceeded to tickle Twilight, then blow a raspberry on her chest, causing the alicorn to explode with laughter.

Princess Celestia then cleared her throat. "Thank you for agreeing to this, Pinkie Pie. I know you've been busy since the Cakes left you in charge of Sugarcube Corner. You haven't even had much time to foal around. I'm sure you would've rather liked to have been the foal instead of the foalsitter."

The pink party pony waved a hoof. "Hey, you needed a foalsitter, and I needed a chance to refresh my foalsitter skills. Besides, how could I say no when you clearly wanted a break? Even mommies and daddies need a break from time to time."

"Well, if there's ever anything I can do to pay you back for this, you just let me know." The regressed sun princess sincerely stated.

Pinkie Pie giggled and snorted. "Why would I want anything else? Running Sugarcube Corner may not be all fun and games, but I wouldn't trade the smiles on the happy faces of my customers for anything in the wide world of Equestria. Besides, I still find time to do the things I like to do. And it's not like it's a permanent change, Mr. and Mrs. Cake are just on vacation right now. They'll come back eventually, refreshed and renewed," She then reached up a hoof and started digging into her mane. "Now let me see: I know I put that diaper bag you told me to pack somewhere." Several objects that should've been impossible to fit into a mane tumbled out as a result, creating quite the noise in the process.

Smarty Pants seemed to be utterly astounded, especially once she saw Boneless (or rather Boneless Two given the big red number two painted on the rubber chicken's belly) fall out and land on the floor. "How do you fit all that stuff in your mane, Pinkie?"

Whilst continuing to rummage around inside her mane, the pink party pony winked and said vaguely. "That's my little secret. I do lots of things nopony else seems to be able to do. I guess that's just what makes me me. Besides, with how often I've tried to style my mane, I feel like it almost has a mind of its own," Then, at last, she proudly proclaimed with great confidence! "Aha! Here we are! I knew I didn't forget to pack it!" Out from her mane emerged a comically oversized saddle bag that had her cutie mark printed on it. She set it down on the floor of the bedroom and opened it up, pulling out its contents one by one. "Diapers: Check," She tossed aside an entire box full of plain white diapers. "Foal powder: Check," Next to be removed was a large canister of the aforementioned powder. "Wipes: Check," A container of wet wipes was placed on the floor next to the diapers and the powder. "Rash cream: Check." The tube containing the cream was quickly set aside.

Twilight was absolutely amazed by how prepared Pinkie seemed to be. No doubt, her experience with the Cake twins had taught her well.

Pinkie just continued to empty out the incredibly large saddle bag. In addition to the diapers and the changing supplies, there was also jars of different flavored foal foods, a few foal toys such as rattles and squeaky toys, pacifiers in shades of baby blue and baby pink, and most surprisingly of all several baby bottles filled to the brim with milk (along with a mini-fridge to store them in). The pink party pony turned foalsitter then wiped the sweat from her brows. "Whew! That's everything." She said with great confidence.

Celestia smiled, satisfied with Pinkie's preparedness. "Indeed, all of this should be more than enough for the two of us," She said as she turned to Twilight. "Now don't worry, Twily. We'll only be this size until sunset. And I promise, next time I will ask before I cast an age spell on you."

"Okay, Mommy," Twilight nodded back, before asking. "So, what are we going to do on your day off?"

The regressed sun princess beamed happily, informing her fellow padded princess. "Well, today is far too nice of a day to stay cooped up indoors. So we're going to be going out to the park here in Canterlot."

At that the original padded alicorn let out a gasp as her eyes went wide! "But... but... everypony will see us! They'll get suspicious! My secret will be out! I'll be a laughing stock!" She shuddered and looked about ready to tear up.

Princess Celestia nuzzled next to Twilight, sweetly reassuring her. "Not to worry, Twily. I already thought of that when I was making my plans for today," Then she turned to Pinkie Pie and instructed. "Pinkie, if you wouldn't mind..."

Pinkie smiled. "Right!" She quickly pulled out a mirror, and held it before the regressed alicorns, thus showing them what they looked like. "See? Nopony's gonna recognize you!" Indeed, the mirror showed that the two padded ponies looked like ordinary unicorn foals: Twilight's coat was now a bright shade of pink, and her mane and tail were dark blue and void of the reddish-violet skunk stripe. Her eyes had changed to a sea green shade, and her cutie mark was no longer visible. Princess Celestia, meanwhile, appeared to be a pure yellow coated unicorn about the same size as Twilight, and with a plain white mane and tail. Her eyes were now a vivid shade of red.

That seemed to satisfy the formerly paranoid padded princess. Or at least it did until she thought of something else. "Won't ponies find it odd that two random foals can talk completely normally, though?"

Celestia chuckled. "No they won't, Twily. I not only cast a spell to disguise our appearances, but also a spell to hide our voices. To everypony not in the know, we'll just sound like normal foals speaking in foal babble. And nopony will find it odd if Pinkie talks to us as if she can understand us. Like you said, she already does things nopony else can do. So talking to foals and understanding them won't seem at all out of the ordinary."

"Exactly!" The pink party pony foalsitter happily declared as she put the mirror away! "So throw all those worries away, Twily! You and Sunshine Smiles here are going to have the best day out you could ever imagine!"

"'Sunshine Smiles'?" The sun princess blinked.

Pinkie Pie grinned and giggled. "Why not? Twilight's going to be Moonlight Beams. I figured you could both use names that nopony will suspect while we're out and about. Of course, you two can talk to each other normally, I'll be the only one who knows what you're actually saying," She playfully patted her charges on the forehead. "Now come on: This day's not gonna last forever, you know! Let's get you two ready for a day of fun at the park. And remember: If you need anything, just ask me. It's what I'm here for."

With the arrangements having been explained, Pinkie thus wasted no more time. She took hold of both regressed padded alicorns, then plopped them down into a double seated stroller that had an extendable canopy to block out the sunlight (thus keeping it out of the regressed princess' eyes). Once she had buckled them in and ensured they were secured, she then went about repacking all the supplies into the diaper bag before strapping it securely around her haunches. "Okie dokie, we're all set!" She happily declared with a smile.

"Ready to have fun, Twily?" Princess Celestia whispered to her former student.

Twilight nodded ever so slowly, part of her was still unsure and was worried that the age spell and everything related to it might fail. She would've much preferred casting it herself, so as to ensure there was no chance of that happening. But the situation was out of her control. So she just clutched Smarty Pants tightly.

Pinkie then pushed the stroller with the padded princesses inside of it through the castle hallways, past the seemingly endless maids, guards, and other castle staff that waved and cooed at the foals inside of the stroller (not one appearing to recognize who the foals actually were). At last, she reached the castle courtyard and with one more push she wheeled the stroller out onto the streets of Canterlot proper. She took great care in not pushing too fast and thus worry her charges needlessly.

Everything seemed to be working out just fine so far. Despite how ponies passed Pinkie and the princesses by, not a single one of them said or did anything that conveyed they were at all aware of what was going on. Most seemed to pay no real attention to the pink party pony turned foalsitter, and even the few who did made no comment about the foals that suggested that any of them recognized the foals' true identities.

"The spell is working, Twily," Smarty Pants whispered after a while. "This is perfect! You can be as much of a foal as you want, and nopony will ever know except Pinkie and our big sister over here."

The regressed padded alicorn let out a small sigh of relief. "Yes, it appears that we truly are disguised. I guess I shouldn't have doubted big sissy. She really knows her stuff when it comes to these complicated spells."

Then the earth pony foalsitter with a pretty pink coat leaned down briefly and whispered to the disguised princesses. "How are we doing, my little ponies? Does anypony need a break?" She sniffed the air, only to detect no strange smells. "Doesn't smell like anypony needs a diaper change just yet."

"You'd really be okay with changing my diaper, Pinkie?" Twilight questioned. For whatever reason, that felt so odd to her even though she'd had it done when Pinkie had been her playmate.

Pinkie Pie firmly nodded. "Hey, it's what foalsitters do. After all, you're not old enough for the potty yet. So if you have to go, just go. Do whatever you need to do, and I'll change you afterward. You don't have to worry about a thing, okay?"

Apparently satisfied with such a statement, the younger padded princess nodded back and then leaned back into the stroller. It seemed like it was still a ways to the park, so she started to close her eyes in the hopes of catching a little shut eye for however long the journey would take.

However, it was at that very moment that none other than Prince Blueblood happened to come walking by. As soon as he spotted Pinkie and the stroller, he frowned and approached her with his snout held high in the air in disapproval. "Whatever are you doing here?!" He hissed. "Don't you have that silly little bakery back in Ponyville to run?! Or did somepony invite you here to throw a rather childish party?!"

The pink party pony protested in reply. "Isn't it obvious? I'm here to foalsit these little ones," She briefly gestured to the stroller. "You probably don't know this, but I can be very responsible when I want to be!"

Blueblood humphed. "I sincerely hope you didn't steal those foals, not that I particularly care," He eyed the foals and frowned in disapproval at them. "Little ones are so utterly annoying! It's bad enough ponies want me to actually kiss their babies! But at least I don't have to actually care for them at all! They are noisy, smelly, and very bad mannered! And of all the foals I've had the displeasure of coming across, these ones seem especially ugly!"

At that, a loud wail could be heard coming from the stroller! In spite of her best efforts not to do so, Twilight couldn't keep from crying! She figured the prince probably wouldn't be saying such comments if he knew who she really was, but they stung just the same.

Princess Celestia, for her part, just leaned over in the stroller to comfort Twilight and whispered. "It's okay, Twily. Don't mind my nephew. He's just being a brat," She let out a sigh and humphed. "Like he usually is, unfortunately." She already made a mental note to discuss his behavior with him the next time she saw him, albeit without letting him know that she had been a direct witness to his latest bout of bad behavior.

Blueblood seemed to overhear the foals babbling, and rolled his eyes in annoyance. "Oh, excuse me," He sarcastically quipped. "It is hardly my fault if I find you foals to be far from pleasing. It's bad enough I have to deal with being snubbed yet again upon learning that my Aunt Celestia has preferred my Aunt Luna instead of me to run the country in her absence. Having to deal with such nasty foals as you is enough to make my fur crawl. Rest assured, you will most certainly not be getting a kiss from me today, little ones."

"Don't you have anything better to do, Prince Blueblood?" Pinkie Pie frowned in reply. "You're making my foals all upset. It's like you have no manners at all."

The prince snorted and swished his tail! "I don't need a lecture from a pony like you who trashed the Grand Galloping Gala alongside her friends! I have no idea how it is that you could defeat such threats as King Sombra or Queen Chrysalis, nor do I particular care. Far as I'm concerned, you are all unworthy," Then he stomped his hooves down. "Besides, you would do well to teach your foals to watch their tongues when they are in my presence. At least when I was growing up, foals were taught to respect their elders," Right as he finished speaking, he sniffed the air and recoiled and gagged as an all too familiar foul stench assaulted his ill prepared nostrils! "Ugh! Now they even have the nerve to soil themselves before my very eyes!"

Pinkie, undeterred by the smell, just replied. "I'm sure they didn't do it on purpose," Under her breath she muttered. "Though it would serve you right after talking about them so badly."

"What was that, young mare?!" Prince Blueblood inquired. "Speak up, I didn't quite hear you."

The pink party pony hastily corrected. "It's nothing! But I should probably get them changed before they get a rash! So why don't you just go do... something princely somewhere else?"

Blueblood firmly nodded. "That is the first good idea you have ever had, Miss... whatever you said your name was. I would at least bid you a good day, but we both know my day has been anything but good," He then trotted off, rolling his eyes again and remarking to himself. "I've half a mind to give such disgusting foals a royal flush! At least then I wouldn't have to put up with their nasty behavior!"

As soon as Prince Blueblood was out of sight, Pinkie bent down in the stroller and spoke sweetly to them to call them down. "It's okay, he's gone now. I'm sure he probably didn't mean all those nasty things he said. He was probably just in a bad mood," She put a hoof to her chin. "It seems like he's always in a bad mood. For a grown-up pony like him, he acts as if he's no better than a spoiled foal."

"Believe me, you don't know how tempted I was to regress him into a foal right on the spot," Princess Celestia declared quite firmly. "And I'd say it serves him right that we messed ourselves right in front of him! Rest assured, he will be punished severely for his bad manners the next time I see him."

Twilight giggled. "If you do turn him into a foal, you should be sure to give him lots of spankies! He definitely deserves them!"

Celestia snickered. "I'll keep that in mind, Twily."

"Not to change the subject," Smarty Pants spoke up as a hoof rested over her nostrils. "But can we please get you two changed already?! You're stinking up the stroller, and I don't like it! I can handle one smelly baby, but two stinky foals is a little too much!"

"Oh, right, I almost forgot," Pinkie Pie said rather sheepishly, blushing a bit as she unbuckled the two regressed alicorns and took them into her hooves. "Come on, let's find a place to get you two stinky fillies changed," As luck would have it, the stroller had stopped almost right in front of a small ice cream shop. And that gave the foalsitter an idea. "Tell you what:" She said to them. "If you two don't make a fuss during the diaper change, we can get ice cream afterwards. How's that sound?"

Twilight happily clapped her hooves and cheered! "Yay, ice cream!"

"Sounds lovely to me." Princess Celestia chimed in with her own sentiments.

Pinkie thus wasted no time in carrying the two stinky princesses into the shop, and immediately made a beeline for the mare's restroom at the back. Once inside, she placed her smelly charges atop the changing table and set the diaper bag down before opening it up. She then reached into her mane, quickly pulling out some rubber gloves and a clothespin (which she placed over her nose). "Okie dokie lokie," She said as she took several deep breaths. "Time to get you all cleaned up. Hold still, please."

Luckily for both Twilight and Princess Celestia, Pinkie's foalsitting skills had not diminished in the slightest despite how long it had been since she'd last tended to the Cake twins. She very quickly undid their soiled diapers and tossed them into a nearby trash bin. "Phew! What did you two eat that made you so stinky?!" She exclaimed while fanning a hoof in front of her face, making both princesses blush as their faces were flushed with embarrassment. Quick as a flash, she wiped them down, powdered them, and strapped them into brand new, spotless diapers. Then she took off the gloves and the clothespin, tossing both into the same trash she'd discarded the dirty diapers in, before washing her hooves and helping her now clean smelling charges down.

"Thank you, Pinkie!" Twilight breathed a much needed sigh of relief. "I'm sorry I didn't warn you ahead of time how bad it was going to be."

The pink party pony waved a hoof, dismissing the concern. "Oh, you couldn't help it, Twily. You're a foal, and foals wet and mess their diapers a lot. Besides, your dirty diaper wasn't that bad, and neither was Princess Celestia's. It's nothing compared to the first time I had to change Pound and Pumpkin Cake."

Celestia, meanwhile, just said. "I've more than gotten used to how stinky you can be, Twily. And now you know that even big sisters can have accidents too. So there's nothing to be ashamed of if you have a stinky accident or two from time to time. It doesn't mean I'll love you any less."

"Exactly!" Pinkie Pie beamed! "Now come on: A deal's a deal, so we're getting ice cream. And then it's only a short walk from here to the park."

After the detour for ice cream (Twilight and Celestia both got vanilla, and Pinkie Pie got strawberry), it was indeed not far at all to reach the park. By now, the sun was high overhead, and the park was packed with foals and their parents, some strolling along in silence and others running about while screaming and cheering in delight.

"Alrighty, my little ponies!" Pinkie happily cooed as she wheeled the stroller right into the middle of the park, stopping by a small playground. "Here we are!" She unbuckled her charges and set them down on the outskirts of the playground whilst she sat on a nearby bench. "Go on: Go play and have fun. I'll be right here if you need me."

Princess Celestia then encouraged her fellow padded princess! "Come on, Twily! You heard what Pinkie said! There's so much fun waiting for us. And you already know nopony but Pinkie's gonna recognize us."

Smarty Pants encouraged as well! "Yeah. It's not every day you get to go to the playground. There's so much to see and do: Slides, swings, seesaws, you name it! I can't remember the last time we had that kind of fun together!"

So Twilight somewhat hesitantly waddled along, Smarty Pants resting firmly on her back and occasionally looking back to make sure the doll hadn't fallen off. Everything else today had gone smoothly, her identity and her secret hadn't been exposed.

The two regressed princesses had only taken a few steps onto the playground, when suddenly it was as if every foal within a five mile radius had become aware of the newcomers' presence. One foal with a sky blue coat and a vibrant orange mane and tail all poofy waddled up to Twilight and Celestia. "Hi," It greeted in an obviously female sounding voice. "I Sky Streak! Was your names?"

With practiced precision, Celestia gestured to herself and to Twilight and said. "I'm Sunshine Smiles, and this is my friend Moonlight Beams."

Sky Streak briefly eyed the two foals, before smiling and extending a hoof. "Nice to meet ya. Ya new here? I not seen either of ya before."

The regressed alicorn with a majestic white coat nodded. "Uh-huh. We just moved to Canterlot not that long ago. Our mommies and daddies work at the castle!"

"Ooh!" Sky Streak exclaimed with starstruck wonder. "Do ya get to see the princesses and the royal guards?"

Princess Celestia happily nodded. "Uh-huh. We see them all the time. Isn't that right, Moonlight?"

"Huh?" Twilight blinked, before hesitantly and nervously answering. "O-oh, yes. They're lots of fun to play with. We especially like to play hide and seek with them, and we're always hiding. One time, we hid ourselves so well they had to search the whole castle just to find us!"

Sky Streak then eyed the well worn doll resting on Twilight's back. "What's that ya got there? Looks like some old doll."

The younger padded alicorn lifted Smarty Pants off her back and held it in front of her. "Oh, this is Smarty Pants. She's not just a doll, she's my best friend! Say hello, Smarty Pants."

Smarty Pants spoke in a very obviously exaggerated voice. "Hello, I'm Smarty Pants. Nice to meet you, Sky Streak."

Sky Streak eagerly shook the doll's hoof. "Is nice to meet ya too, Smarty Pants," Then she turned her attention to the princesses (though she clearly didn't recognize who they actually were) and said to them. "Come on: I gotta introduce ya to the rest of the crew! This our playground, we all meet here to have fun together! And now ya one of us! We always got room for new playmates!" Happily kicking her back legs, she waddled off towards the other foals all scattered across the playground.

The regressed sun princess smiled anew, taking her fellow padded alicorn firmly by the hoof. "Come on, Twily! No turning back now! Let's go have some fun!"

Twilight followed, still just a little bit hesitant. But one look back to Pinkie Pie (who gave a silent, encouraging nod) erased any doubts she might still have. For however long she would remain like this, she very much wanted to make the most of it.

The rest of the day was a fun filled blur for both regressed padded princesses. Neither could recall the last time they'd had so much fun with others: Whether it was going down a slide, swinging on the swings (with Pinkie pushing them as needed), bouncing up and down on the seesaw, spinning round and round on the merry-go-round, or just running up and down the steps and throughout the length of the playground equipment. The fun was only interrupted on occasion when Pinkie Pie would subject them to unannounced diaper checks, and more often than not change them at a nearby park restroom.

Everypony was having so much fun throughout the day that hardly any of them were paying attention to the passage of time. Alas, the sun eventually began to grow lower and lower in the sky. And with sunset approaching, it was time for everypony on the playground to go their separate ways.

Pinkie quickly scooped up Twilight and Celestia, buckling them into the stroller as she cooed. "Good job keeping those diapers clean this time."

"Sorry we made you go through so many of them, Pinkie," Twilight blushed anew as she and Celestia settled in for the ride back to the castle. "I guess we were just too absorbed in playtime to notice when we were wetting and messing ourselves."

"Or maybe it's just a sign that the spell was working as intended. Foals don't always know when they have to go," Princess Celestia replied. "Plus, it really did make me feel young again. It did make you feel young again too, Twily?"

The padded princess nodded. "Yes, even more than usual."

The pink party pony just smiled as she pushed the stroller along. "Well, this was definitely a blast from the past. If you two ever wanna do this again with anypony, you just let me know. I'm happy to be the foal or the foalsitter."

The younger padded alicorn replied. "True, you are good at being both," Then she thought of something that had only just now come into her mind. "But if you were here today taking care of big sis and me, who was watching Sugarcube Corner back in Ponyville?"

Pinkie Pie chuckled. "Oh, that's easy, silly. Maud was doing it. She was already staying close to Ponyville as it was, something to do with a dig in Gastly Gorge, I think."

And Twilight questioned. "Did she say anything at all... unusual?"

Pinkie shot Twilight a most puzzled look. "What do you mean? She seemed to be her usual Maud self, maybe a little bit happier."

The padded princess just shrugged her hooves. "Nevermind, forget I said anything." If Maud hadn't told Pinkie about that other side of her, Twilight wasn't going to tell. It wouldn't be right for her to blab about somepony else's secret after all the ponies who'd been entrusted with keeping her secret.

As for Princess Celestia, she was thinking quietly to herself. All in all, her day out with Twilight had been thoroughly enjoyable. Aside from the encounter with Prince Blueblood, there had been nothing that stood out as an immediate cause for concern. Well, that is except for how much it seemed Twilight was apologizing for everything she did while regressed. That stood in stark contrast to all the times when Twilight had seemed content to act as a foal to the fullest extent possible when in the sun princess' care.

Celestia made a mental note to bring this up whilst helping Luna with her duties at night. At the very least, Luna could hopefully reassure her that she was overthinking things and that there was nothing to be worried about.

"Well, here we are!" Pinkie Pie said at last as she pushed the stroller right up to the castle gates and brought it back inside the confines of the castle. She then quickly led them back to the bedroom Twilight so often frequented during her stays, and just in time as the spell Princess Celestia had cast wore off only seconds later.

"You can go back to Ponyville, Pinkie Pie," The sun princess reassured the pink party pony whilst removing the diaper wrapped around her rump. "I can manage on my own from here."

Pinkie gave a salute and nodded. "Gotcha, Princess Celestia! But if you ever need my help again, you know how to reach me." Then she bounced away with an exceptionally bright smile on her face.

Bluebella (Prince Blueblood)

Author's Note

Seeing as Prince Blueblood is the only one who got a vote, he is going to be the character of focus here.

The only vote cast this time around was by Scootabom1, who specified that Blueblood would be physically regressed to be slightly older than teenage Applejack (as seen in "Where the Apple Lies" supposedly), look fairly feminine, be incontinent, and speak and behave like a child, all with the handwave that it was how he used to look. He also proposed Blueblood be trapped wearing girly and babyish outfits, as well as have him hate being called "cute" because he was mocked about it growing up.

This is in no way intended to mock, make fun of, or otherwise belittle drag queens, crossdressers, or anyone of transgender orientation. I specifically want to specify that before anyone gets any ideas. And neither is this intended as any sort of commentary on such people in either real or fictional life.

I again wish to remind you all that even though physical regression is on the table as well as mental regression, no school aged characters are allowed due to the possible "sexual" nature of this fic and the rules specifically prohibiting it for any characters under the legal age of consent. And again, you can vote for any character that has either not appeared, or will appear in a group pairing. It doesn't have to just be the characters already on the list.

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family)

Characters previously voted on:
Derpy, Marble Pie - One vote
Sassy Saddles, Fleur - One half vote

Bluebella (Prince Blueblood)

Princess Celestia could only tsk and sigh as she used a wet rag to wipe Twilight's face clean. The padded princess had gotten her face full of syrup, whipped cream, and butter as a result of messily trying to eat pancakes with just her hooves. Such behavior had been rather concerning to the sun princess, she would've expected her fellow alicorn to know better. Had it been an intentional act whilst Twilight was "in character", or an attempt by Twilight to assert her independence? Celestia didn't know.

Twilight, for her part, just wiggled around as the wet rag made contact with her face. "It's so cold." She complained. Yet try as she might, she could not overpower the elder alicorn or at all fight back.

The sun princess frowned and adopted her best scolding mother tone. "Well, Twily, this could've been avoided if you'd just waited for me to feed you. Be grateful I don't make you take a bath."

"Oh, but baths are no fun, Mommy." Twilight pouted, folding her hooves across her chest.

"I know they aren't, Twily," Celestia adopted a more gentle, compassionate tone as she finished up the wiping job. "All the same, it has been a while since you last had one. And if you continue to make messes like this, I will have to start bathing you more regularly," Once she had set the used rag aside, she pulled back Twilight's diaper via her magic in order to perform an inspection. "Well, you're still dry and clean, for now," She said with a knowing wink. "Would you like to try and use the potty for me before I bring in your next playmate?"

The padded princess promptly directed her gaze towards the almighty porcelain throne that could be seen through the open bathroom door. She eyed it for a moment, seemingly hesitant and conflicted. But then, with a straight face and a smile, she said. "Nope. I'm good, Mommy. I don't feel like using it right now. You'll still change me if I use my diaper, right?"

Princess Celestia nodded ever so slowly. "Whatever makes you comfortable, Twily. I don't want to force you into it. If you ever do decide to use it, though, remember that you have to ask me for help first. We wouldn't want a repeat of what happened the first time you tried to use it by yourself."

Twilight blushed, surprised that her fellow alicorn knew about that incident from her youth.

Celestia just snickered. "It's not that I think it would ever happen again, but I don't want any mishaps," Then she stood up as she set Twilight down on the floor of the bedroom. "Now, just sit tight, Twily. I'll be back shortly with your next playmate. And hopefully, you can teach them how to behave." She promptly lit up her horn and disappeared in a flash.

"What do you think Mommy's bringing this time, Smarty Pants?" Twilight asked her old doll while she sat down on her padded posture.

Smarty Pants could only shrug her hooves and reply. "I don't know, Twily. Let's just hope it's somepony nice. And maybe somepony a little less smelly."

Twilight blushed anew. "Smarty Pants, after how long you've been at my side, how are you still not used to me when I get stinky?"

"Twily, you know I'll always love you no matter how stinky you are," Smarty Pants pointed out. "But just because I love you doesn't mean I can't still find your stinkiness to be overwhelming sometimes. I may get used to it, but I don't have to like it."

The padded princess giggled. "Oh Smarty Pants, you're so silly. And that's just what I like about you!"

A moment or so later, Princess Celestia teleported back into the bedroom with her "invited" guest. It appeared to be a somewhat tall yet slim looking unicorn colt with a gleaming white coat, blonde locks styled into curls, and blue eyes that shone like diamonds. He was clad in a thick, finely detained diaper with gold trim around the edges (and on the leak guards), and appeared to be wearing an overly lavish and frillish dress a reddish-pink in color that seemed designed specifically to draw attention to his fancy diaper. Strangely enough, though, the colt also seemed to look almost like he could be a filly given his overall outward appearance in body.

When the colt spoke up, however, even though his voice was high pitched there was no mistaking its snobbishness. And it confirmed that it could only be coming from one pony: Prince Blueblood. He quickly laid bare his disgust and contempt for the situation he now found himself in. "Auntie Celestia, have you lost your mind?!" He complained as he awkwardly shook about, trying in vain to pull down his diaper. "Look at me: If anypony important saw me like this, I would be the laughing stock of all of Canterlot!"

Celestia could only scold the feminine looking colt. "Well, I'd say it serves you right after you spoke so rudely about little Twily here. You two are technically related, much like with your sister, Princess Cadence."

Blueblood's eyes went wide as he gazed upon Twilight in all her padded glory! Compared to him, she was wearing only a plain, white diaper that hugged her rear tightly. And she seemed not to have a care in the world. "What?! But... but... there's no way! I never saw her like this before!" He complained, before the gears in his mind started to turn. "Although, perhaps if I were to disclose her secret, all of Canterlot might not find out about my humiliation."

The sun princess was quick to glare at the prince, before bringing up a camera and hastily making it flash. "I'd think twice if I were you, nephew," She said in a disapproving tone of voice. "If you mention word of this to anypony, I can guarantee that all of Canterlot will find out about little Bluebella here. I did not invite you here so that you could exploit the situation like you have done when catching other ponies in less than favorable situations."

"I still don't understand!" Blueblood whined and pouted as he felt his legs betray him, causing him to stumble to the ground and stick his padded posture up in the air for all to see. As he then slowly rose to his hooves, he made a very specific demand. "What did I do to deserve such punishment? I haven't been like this in ages, and you know all too well why that is the case."

The alicorn princess with a majestic white coat the same color as her feminine looking nephew's simply shook her head from side to side. "I saw you with my own eyes, Blueblood. You remember those 'foals' you encountered during the time I was having my sister oversee my responsibilities? The ones you specifically frowned upon and threatened to give a royal flush to?"

At that, the feminine looking prince gasped and jumped back in surprise! "Wait a minute, that was you?!" He received a confirming nod, and the realization slowly dawned on him. "Then that must mean..."

"-Yup, it was actually us!" Twilight beamed as she trotted over! "You were acting like a big dumb meanie! A real poopy head! Didn't anypony ever teach you any manners?"

The prince began to stutter. "W-what?! D-don't be silly, o-of course I was taught manners. I-I had no idea about any of this. H-had I known, I wouldn't have said what I said. A-and I was only joking about the royal flush part. O-obviously, I would never dream of doing it to any foal, no matter how much they might tempt me to do so. I-I mean t-that's as bad as actually taking candy from it. A-anypony who would do that would deserve whatever fate and punishment that might befall them."

"So, are you sorry, then?" Twilight questioned in an innocent sounding tone of voice. "If you are, then you have to say it. I know that whenever I do something wrong, Mommy always makes me say sorry afterwards."

Blueblood blinked in surprise. "You do know my Auntie Celestia is not really your 'mommy', right? Last I checked, your mother is the same mother who raised our former captain of the guard, and is a grandmother to the heir to the crystal throne."

The padded princes giggled and swished her padded rump around. "It's all a part of the act, Blueblood. Or should I call you Bluebella?" She briefly snickered before recovering. "It's like being in a play. It's all just pretend. But that's what makes it fun."

The feminine looking prince sighed, putting a hoof to his forehead. "So I see. I personally don't understand why anypony would ever want to 'pretend' to be a foal again, but I suppose it is not my place to pass judgment since I too have secrets that I have gone to great lengths to keep hidden."

Celestia then encouraged. "So go on then, nephew. You know what you have to say to Twily."

Prince Blueblood could only bite his lip in response, slowly managing to force out the words. "I'm... I'm... s-sorry. Really, I am."

"Well, Twily, what do you think?" Celestia questioned her fellow alicorn.

Twilight smiled. "I'd say he sounds like he means it. I think he truly is sorry."

"Okay, there, are you happy now?" Blueblood pouted and frowned as he turned to his aunt and pleaded. "Can I please be changed back to my normal, grown-up self now?"

But Princess Celestia shook her head from side to side and told him. "I think you need to spend a little time remembering who you used to be. Because I know for a fact that you were not always such a snobbish and selfish prince. Perhaps some time spent revisiting those younger days will help to remind you that your inherited title does not give you a license to be cruel. If you can play nice with Twily today, you won't have to spend more than a day in diapers. But if you cannot," She held up the camera. "Your little 'secret' will soon become anything but. I will not hesitate to take another picture of you, Bluebella, and have it be released to the press. The choice is up to you."

The feminine looking prince groaned. "Oh, I hate when you do this, Auntie Celestia! You could've at least asked me first."

Celestia snickered, flashing a mischievious grin. "Where's the fun in that?"

Blueblood was rendered speechless!

Twilight, now satisfied with Blueblood as a playmate (and with his apology), trotted up to him fully and pulled him close. "You ready to have fun, Blueblood? Or, I guess I should call you Bluebella now," She adopted a somewhat puzzled look. "Why do you look like that, anyway? Did you mess up a spell or something? I know I once read about a spell that could turn a full grown mare into a stallion."

At that Blueblood eeped and squeaked as his cheeks flushed a bright shade of pink! "Perish the thought! This is not the result of some spell or other magical mishap!" He shamefully confessed. "If you must know, I was a very feminine looking colt growing up," As he spoke, it was possible to detect something of a lisp slipping out in spite of his best efforts to hide it. "My parents were never quite sure why. They had wanted a colt, and I was born as a colt. Yet as I grew up, my body took on more of a feminine appearance. And as it so happened, the only clothes that would fit my unique body type were clothes designed for fillies. Thus, I became known quite mockingly as 'Bluebella'."

"Oh, other ponies made fun of you because of it?" Twilight questioned, appearing to sound genuinely surprised and concerned about such a possibility.

"Sadly, yes," The feminine looking Blueblood admitted. "I was the laughing stock of the whole playground, no the whole neighborhood. Hardly anypony wanted to befriend me, they all teased me and called me 'weird' or 'a freak'. What friends I did have only ever played nice with me so as to gain favor with my parents, knowing that they were part of Canterlot's elite social circle. Alas, Mommy and Daddy seemed much more interested in molding me into something to show off, always dragging me along to fancy parties and galas. Though I would be lying if I said I didn't grow to enjoy them. They were the rare times where I could get away from all the teasing, all the taunting, all the tormenting."

"Is that why you're wearing such a fancy diaper?" Smarty Pants inquired. "I've never seen a diaper like that. It seems kind of ridiculous to make diapers so fancy. It's as silly as ponies calling the big potty a throne. A potty's still a potty, and a diaper's still a diaper."

The prince unhappily sighed as he looked back at his padded rear, shaking it about uncomfortably even as it remained firmly in place. "Not really. Obviously it would never do for any young pony of my upbringing to forever remain in the accursed padded undergarments," He delivered that last line with an audible hiss. "My lavatory training went swimmingly. I was out of diapers by the time I was three years old, and quite happy with such an accomplishment. It would see my Auntie Celestia thought otherwise, however, for she has temporarily taken away my training and left me trapped in the same fancy diapers I always detested wearing growing up. She only took me in after my mommy and daddy were the unfortunate victims of a carriage accident during one of their many lavish vacations. It was a stroke of luck that I was deemed not old enough to accompany them."

Twilight couldn't help but let out a gasp upon hearing that! "I... never knew!"

Prince Blueblood only snorted and humphed. "I don't need your pity if that's what you're thinking. Much as I miss my parents dearly, I long ago made peace with their untimely end. And being raised by Princess Celestia had its benefits: It is how I ascend from being a mere duke to being an esteemed prince. Unlike your brother, I did not have to marry into the title. It was bestowed upon me within days of being brought under Celestia's wing, figuratively and literally. So now you know of my unfortunate past, and of the reason behind my current state of appearance."

"It's okay to miss your mommy and daddy, Blueblood... I mean Bluebella," Smarty Pants hastily corrected herself. "When Twily left home to study with Celestia prior to Celestia becoming her second mommy, Twily missed her first mommy and her daddy every day, and her B.B.B.F.F. too, even though he always loved teasing her."

"Bluebella" frowned and turned his head. "You think I miss them? I haven't looked back since being taken in by Princess Celestia, and for good measure. I became a fine member of Canterlot's elite, just as I'm sure my parents would've wanted."

Celestia could only sigh and shake her head in disapproval, even as she temporarily set her camera down (though making sure it was still within her sight). "Oh well, can't have everything..." Under her breath, she hesitantly added. "Yet."

The feminine prince, meanwhile, just turned to Twilight and to Smarty Pants. "Well, regardless of the circumstances, if my auntie wishes for me to be your..." He struggled to force out. "Playmate, then I guess I shall fill the role as needed," Then after a moment of silence, he asked his fellow padded pony. "What do you want to do? Please tell me it won't be something completely humiliating."

Twilight opened her mouth, prepared to speak. But Princess Celestia spoke up first. "Actually, I have an activity in mind that should suit you both. And hopefully, it will be just the thing to help Bluebella here..." She eyed her feminine looking nephew with a mix of disapproval and concern. "Learn how to behave." She proceeded to float over a lavish looking tea set, which included a sparkling, polished tea pot, matching tea cups, and small plates and silverware.

"Tea party!" The padded princess happily exclaimed!

"Not just a tea party, Twily," Celestia playfully corrected as she patted the padded princess on the head. "It's royal etiquette lessons: Table manners, saying please and thank you. things like that."

"I'm not in need of a refresher course." Blueblood insisted as he nevertheless stuck out his tongue in very childish fashion.

The sun princess simply replied. "I'll be the judge of that, Bluebella. Remember, you're to play nice. Or else."

The feminine looking colt simply sighed deeply, realizing he was powerless in this situation. "Fine. Let's get this over with." He insisted as he trotted over to a small table his aunt had set up.

Twilight waddled her way over to the table a minute or so later and plopped her padded plot right down onto the seat, giggling at how it compressed and crinkled when she did so. Then, lighting up her horn, she set Smarty Pants down in a seat right next to her.

"Oh goodie, another tea party!" Smarty Pants proclaimed! "I love tea parties! I always wanted to attend them, even if I don't drink tea."

"Smarty Pants, you're so silly sometimes." Twilight giggled.

Blueblood, meanwhile, just looked at the doll and at the padded princess sitting across the table from him. All the while, he shifted about on his lavishly detailed diaper, trying in vain to find a more comfortable sitting position. He detested how much his bottom seemed to sink deeper into the padding as he sat there, putting more weight on his hind quarters.

Princess Celestia then floated over the tea set, carefully setting everything down. "Okay, my little ponies," She spoke in a much more formal tone of voice. "We are here today to learn about etiquette, both formal and royal. Everypony must learn how to behave, regardless of what the occasion is that they are invited to."

Twilight sat up straight, and nudged Smarty Pants so that the doll was sitting straight up too. She turned her full attention to her fellow alicorn, smiling as she did so.

Blueblood said nothing, even as he too looked up at the sun princess. For now, at least, he would have to play along with whatever she would have him do. But he was already starting to think. "How can I turn this situation to my advantage? I very well can't allow anypony to get away with seeing me in such a weak and defenseless state. Bad enough I've been forced to disclose my past."

Celestia just cleared her throat, commanding everypony's attention. "Now then, let us begin with some basic table manners," When she saw Twilight reaching for a tea cup, she used her magic to pull the cup away and said with a tsk. "Ah ah ah, Twily. It's rude to take anything from the table before you've been allowed to serve yourself. You know better."

Blueblood put a hoof to his chin, suppressing a snicker as he saw the look of shame on the padded princess' face.

The sun princess continued. "Before anypony may help themselves to tea, they must first make sure they have all the proper items to enjoy it. The same goes for if one were having cake, or anything else," She trotted over to the table. "This includes making sure napkins are placed into one's lap, and not folding them into funny shapes or objects."

Blueblood wasted no time in setting the gold laced napkin upon his lap, certain that he would be showered with praise for his actions. To his dismay, however, he saw his aunt taking much more time fussing over Twilight and Smarty Pants, helping them to get their napkins into their laps. She truly did seem to be treating Twilight as if the younger alicorn were Celestia's child. Was all of this just a part of the "role" the two were playing? Or did they truly seem to believe they were family despite not being related by blood?

After a little bit of fiddling, Princess Celestia had the napkins in Twilight and Smarty Pants' laps just the way she wanted them. Then and only then did she turn her attention to the feminine looking colt at the other end of the table. "Oh, and I see you already managed to get your napkin placed into its proper position all on your own. Very well done, Bluebella. Your mommy would be proud."

"Whatever," The physically regressed prince huffed, blowing a few loose curls of his mane out of his face. "Is it time for tea yet? Please tell me there will also be crumpets."

The alicorn mare with a majestic white coat simply replied with. "All in good time, Bluebella. We must still go over a few more table manners before we move on," And she instructed in her best posh sounding tone. "Now we will cover the proper position of silverware: Including knife, fork, and spoon. All must be placed accordingly before we can proceed."

"Must we continue this act, Auntie?" Blueblood piped up in impatience. "I know my table manners like my ABCs and 123s. It is not my fault if Twily and Smarty Pants do not have them memorized like I do."

"Bluebella, you mustn't be rude!" Celestia sternly lectured. "You would not wish to pay a visit to the time out corner, would you? I seem to remember you were a very frequent visitor to it whilst you were growing up in my care."

At that the prince shuddered as images and memories he'd long suppressed came flooding back to him in an instant! He could well remember the shame, the humiliation, of sitting in the corner for what seemed like hours while he was made to face the walls and stare at them until he was bored. And that wasn't even the worst of it. Though it had been rare, he could remember the times when his adopted aunt had had to discipline him. The pain and the marks may have faded, but the mental wounds and blows to his pride still associated with them made him lose any incentive to further complain or protest.

Satisfied with her feminine looking nephew's silence, the sun princess continued. "Even though we are only having tea right now, we shall place the spoon next to us, and set the knife and fork off to one side since we will not have need of them." She used her magic to demonstrate this with the plastic silverware on Blueblood's side of the table, instructing Twilight (and Smarty Pants, even though the doll needed help from Twilight) to do the same.

"Is this good enough, Mommy?" Twilight asked as she opted to use her hooves rather than her magic to try to adjust the silverware accordingly.

Eyeing the placement of the plastic utensils, the elder alicorn smiled with satisfaction and showered her fellow princess with exaggerated praise! "Oh yes, very good, Twily! And you too, Smarty Pants! I dare say, Bluebella over here could learn a thing or two from watching you both."

Blueblood could only hope his aunt was joking.

"Now we may enjoy the tea that has been prepared for us today," Celestia went on, gently levitating the tea pot with her magic and pouring its contents into three separate cups. She then floated one cup over to Prince Blueblood, another to Twilight, and kept the last for herself. "And remember, if you want seconds, you must ask for them. Also be sure to say 'Please' and 'Thank you' accordingly."

At that, the gears in the prince's mind began to turn. He had an idea for how he might be able to get some enjoyment out of his current predicament. And a rather naughty idea came into his mind as a result. "You can go ahead and drink as much tea as you like, Twily," He said in an overly formal, exaggerated tone of voice. "I am fine with just the one cup." He proceeded to sip from said cup very slowly, setting it down but a second or two later.

Twilight was all too happy to help herself to the rest of the tea! She downed cup after cup, even though she took the time to do so slowly. It was only when she was her very last cup that she began to realize the foolishness of her decision. She paused and set her tea cup down midway through drinking its contents, biting her lip as she couldn't help crossing her legs.

Princess Celestia immediately trotted over, suspecting what the problem was. "Twily, do you have to go potty?" She asked.

Despite the obvious discomfort she was in, the padded princess protested. "N-no, Mommy! I'm fine! I don't have to go! Really!"

The sun princess was anything but convinced by Twilight's statements. "Twily, it's okay. It's not good to hold it in, you know. That can cause problems."

Blueblood, meanwhile, watched the whole thing unfold with a smirk of satisfaction. "That's it, Twilight," He thought to himself. "Go ahead and piddle your pampers like the foal you are! I am so going to enjoy it!"

Still, Twilight refused to budge from the table. "I... I have to finish my tea!" She pleaded with her fellow alicorn! "I can hold it until then!"

Celestia's concerned look took on a frown as she used her magic to pull the padded princess out of her seat. "It's not up for argument, Twily. Your potty emergency can't wait. We must rectify it before it's too late."

The padded alicorn sighed, admitting defeat. "A-alright, Mommy. But you're not gonna make me sit on the potty forever, are you? I really don't have to go that badly."

Princess Celestia began to smile. "I think five minutes should be more than enough. One way or another, you're going to have to pee-pee." She soon brought the padded princess into the bathroom, pulling down her diaper and placing her upon the toilet after lifting up the seat.

Twilight sat there, legs dangling to either side of the bowl. She wasn't used to being on the potty without Smarty Pants by her side to help her, even though she had managed to use it without the doll's assistance a couple of times.

There was a long silence as the two alicorns just remained where they were in the bathroom, all the while Prince Blueblood could only watch and frown with disapproval.

At last, the silence was broken up with an audible hissing sound. Slowly but surely, Twilight's full bladder emptied itself, bringing the princess great relief. "Ah." She sighed as she relaxed, no longer tensing up and trying to hold back what needed to come out.

Princess Celestia, for her part, smiled and cooed. "Good job, Twily! I'm so proud of you! And I'm sure Smarty Pants would be too!"

"Thank you for helping me, Mommy," Twilight smiled, before apologizing. "I'm sorry I put up such a fuss, and drank all that tea. I didn't mean to make a fool of myself back there."

Celestia just helped Twilight to wipe, flush, and wash her hooves. And while doing so reassured her fellow alicorn. "It's okay, Twily. It happens to the best of us. Even I have sometimes overestimated my body's ability to 'hold it' as it were. And now you know what not to do next time."

The two princesses departed the bathroom a moment later and returned to the table. And as Twilight took up her seat again, Blueblooud pouted and audibly whined. "It's not fair! Why is she allowed to use the lavatory whilst I remain in diapers?!"

Princess Celestia trotted over, eyeing her nephew's diaper and noticing a detail that had apparently eluded his notice up to this point. "Well, maybe if you were better at keeping your diapers in pristine condition, potty training would be an option for you as well."

Only then did the feminine looking prince seem to become aware of an uncomfortable damp sensation on his rear. Sure enough, looking back to his diaper, he could see a visible dark spot as the wetness indicators had faded. "What?! No!" He whined again! "I didn't even notice it! This is all your fault, Auntie!"

The sun princess only replied by using her magic to float the prince up from his seat at the table. "Don't blame me for your inability to tell when you have to go, Bluebella. Now come on, we must get you changed before you get a rash. I assume you would not want to have to explain that to all of Canterlot, now would you?"

"N-no, I guess not." Blueblood relented as he was carried away to be changed.

Celestia soon had her niece planted firmly upon the changing table, and with changing supplies readily available to horn, she set to work on carrying out the diaper change. The first thing she did was take off the pinkish-red gown the feminine looking prince was wearing, watching as it disappeared from sight as if by magic. Next to be taken off was the diaper, which was effortlessly balled up and tossed into the trash without fanfare. Then, Celestia's horn levitated over a bottle of powder, wet wipes, and even some rash cream, all of which were worked into Blueblood's coat with the greatest of ease. After that, she taped him into a diaper equally as lavish and finely detailed as the one he had soaked so thoroughly.

With the diaper change complete, the feminine looking colt pleaded with the princess. "Can I please just wear a diaper from now on, Auntie? You know I hate those fancy dresses you forced me to wear!"

The alicorn mare just replied by floating over a combination bonnet and onesie in hues of baby blue, pink, and yellow. And quick as a flash, she dressed him in it from head to hooves. "I'm afraid it's not up to me. It's part of the spell I cast upon you. It will only wear off once today is done. And even then, only if you behave yourself."

Prince Blueblood frowned as he was helped down from the changing table. "Is all of this really necessary just because I insulted Twilight unknowingly? I said I was sorry."

"This is part of your punishment," Celestia scolded as she ushered her nephew along. "You can either go along with it, or you can stay as you are now until I believe you've learned your lesson. And so far, from what I'm seeing, you aren't doing a very good job. I know you tricked Twilight into drinking all of that tea in the hopes that she would wet herself."

Blueblood humphed. "Not my fault if she can't hold it. When you go to as many tea parties and formals as I do, you get used to not always having the luxury to slip away or excuse oneself to use the royal lavatory. I was merely trying to help her get a taste for that."

"And you wonder why you went back to diapers," The sun princess scolded. "You should've known better than to take your toilet training for granted."

The feminine looking colt groaned. "But it's rude to excuse yourself mid conversation, even to tend to your bodily needs. That's how it is in high society, you know that."

Princess Celestia smirked. "Well, perhaps I should see about introducing legislation to rectify that. What good is it to have perfectly functioning toilets if my subjects aren't willing to make use of them? I remember that when Luna and I were young, we had to rely on old fashioned chamber pots, which were far more burdensome to use."

"Even those would be preferable to wearing diapers all the time. I for one detest the idea of even changing them." The prince protested.

The sun princess sighed and groaned. "Why are you so stubborn, Bluebella? Here I try to give you a chance to atone, and you seem intent on throwing it all away."

"Bluebella" just grumbled and bitterly remarked. "You know full well why I am protesting this. You know what I went through growing up. I was in no desire to revisit my foalhood in any way, shape, or form."

"Then perhaps you need a bit more motivation," Celestia declared as she clapped her hooves and called Twilight over. "Twily, I have the perfect idea in mind for what you and Bluebella here can do next. And Smarty Pants is welcome to join in too."

Twilight all but bounced up and down with giddy excitement! "What is it, Mommy?! What is it?!"

The alicorn mare with a majestic white coat happily proclaimed. "Dress up! In fact, why don't you and Smarty Pants join with Bluebella for a little fashion show?"

The padded princess broke out into a wide smile upon hearing those words! "Ooh! What a good idea!" She took hold of Smarty Pants. "Come on, Smarty Pants! Let's go!"

"I can't wait to look pretty and cute." Smarty Pants declared.

Upon hearing the word "cute", Blueblood froze. "Don't call me that, please!" And he sounded rather sincere about it, even in spite of his lisp and high-pitched voice.

Twilight blinked in surprise. "Call you what, Bluebella?"

The prince bit his lip anew, throwing his hooves across his mouth as he refused to speak or utter a word.

"All I said was that I wanted to look pretty and cute." Smarty Pants commented in a tone of voice that made clear how confused she was by "Bluebella's sudden hesitation.

When Smarty Pants finished speaking, the feminine looking colt whimpered and seemed to start mumbling something to himself despite his attempt to remain silent.

Suspecting something was up, the padded alicorn trotted towards her playmate and eyed him with a mix of concern and curiosity. "Seems like whatever it is Smarty Pants said made you remember something you don't like. Did she say something wrong?"

Hesitantly, Prince Blueblood managed to force out in a quiet, hurt tone of voice. "...Do you promise not to tell anypony?"

"Tell them what?" Twilight questioned with sincere confusion.

The padded prince slowly forced out the explanation. "I hate being called cute, especially when I'm in this unfortunate state."

The padded princess blinked in surprise. "Why? I don't think there's anything wrong with being called cute."

Wincing and recoiling as if from shock, Blueblood explained further. "Maybe not for you, but for me it was anything but a compliment. It was the absolute worst insult I could ever hear: Worse than being called 'weird' or 'a freak'. Colts used to call me cute all the time so as to mock me. And even some fillies would do it too. It's why I was so glad when I outgrew my feminine looking body and matured into a rather handsome stallion. Now, suddenly, ponies couldn't get enough of me. Every stallion wanted to be my friend, and every mare wanted to court me or marry me. It felt so good to feel appreciated and respected, being a pony that others looked up to rather than looked down upon."

"Well, I think anypony who would use 'cute' as an insult isn't a pony worth knowing," Smarty Pants spoke up. "Twily and I learned long ago not to let what other ponies thought of us be too important."

"And yet here you both are, playing pretend within the secure confines of the castle, away from prying eyes," Blueblood lamented. "Whereas it seems you could only go out into the city if disguised, given that I did not recognize you during our last encounter. I know that if I were unfortunate enough to even stroll around the castle grounds like this, I would never be allowed to hear the end of it."

Twilight just smiled, nudging the prince in the side. "Just because you didn't grow up the way you wanted to doesn't mean you have to shut out your foalhood. Think of this as a chance to enjoy it without anypony making fun of you for it. A chance to let go and be who you truly want to be, not who you thought you had to be. And maybe you could use this as a chance to start over, to be a better you."

The feminine looking prince seemed to be surprised by the statement. "You really truly believe that despite all I've said and done, I can change?"

The padded princess nodded and giggled. "Sure. It's never too late to start again. And I think that connecting with your inner foal is the perfect way to do it! Just because you grew up doesn't mean you have to leave behind everything you knew before," Nuzzling the prince, she then encouraged. "Now come on, let's put on a fashion show that'll make Mommy proud!"

"A-alright. Just try not to dress me up in anything too cute!" "Bluebella" insisted with a nervous blush. "And uh... don't judge me if I happen to need a break to get my diaper changed. I would attempt to use the er... potty as it were," He couldn't help but giggle at his use of the more childish term. "But... you've seen that I don't exactly have the self control necessary for it."

"Hey, it's okay. You gotta do what you gotta do! That's what your diapers are for! In fact, I'm gonna be known as the princess of padding!" Twilight commented in a foalish sounding tone of voice, even playfully patting her padded posture in the process. "So what are we waiting for? Let's get ready and put on that fashion show for Mommy! You help me pick out an outfit, then I'll help you, and then we can both dress up Smarty Pants together!" And she raced over to a box full of cute, foalish outfits sized up for ponies like her and the feminine prince.

Princess Celestia watched the scene unfold with a satisfied smile. Seeing her nephew finally open up about his troubled past and show a willingness to atone was something she had been trying without success to achieve for a long time. Now, it looked as if finally her patience and prodding were going to pay off.

Yet even though the sun princess was content with the knowledge that her nephew might finally be about to change, she was also secretly worrying anew about whether Twilight was changing. Was her statement about being "The princess of padding" just an act, or did she really mean it? Celestia made a mental note to try to discuss that with Twilight when next she had the chance.

Those thoughts were quickly pushed to the back of her mind, however, as Twilight and Blueblood hastily erected a small stage and runway out of cardboard boxes. Blueblood then went first in strolling down the runway, showing off his outfit: He had swapped out his onesie and bonnet for a lovely sailor suit, which had extra space in the back to accommodate his almost comically oversized diaper, said diaper swaying and swishing with every step he took. Yet the stallion didn't seem to mind it in the slightest.

Twilight went next, wearing a pretty pink dress and tutu. She even had a bit of make-up around her eyes. She paused at the end of the runway, performing something of a clumsy ballet. Then she turned and lit up her horn, bringing out Smarty Pants who was wearing a bonnet similar to the one the feminine looking prince had been wearing.

Celestia smiled, clapping her hooves in approval. "Such a splendid job!" She cheered! "Especially from you, Bluebella. I think you may just have earned a place on the Grand Galloping Gala planning committee!"

Prince Blueblood's eyes went wide with disbelief as he gasped, putting his hooves to his face! "You really mean it, Auntie Celestia?!" And when he got a confirming nod, he shrieked for joy in the most high pitched sounding voice imaginable. "Oh, how I've waited years and years for such a spot!"

The sun princess simply replied. "So long as you keep Twilight's secret a secret, the position is yours."

Blueblood firmly nodded. "Have no fear, Auntie, Twily's secret is safe with me. I wouldn't dare dream of telling a soul!"

Little Marble (Marble Pie)

Author's Note

And thus, the Pie sisters have all been put back into diapers! Kind of surprised Marble Pie had to wait for both Maud and Limestone, then again it seems like if it's not Pinkie the Pie sister who gets the most diaper art tends to be Maud (likely owing to her popularity and more reoccurring appearances).

As usual, it's Scootabom1 who came up with the idea for what to do with Marble: Having her slightly regressed and made to see Twilight and Princess Celestia as family, and her and Twilight having a blanket fort sleepover together (albeit during the day). Marble being in college is a nod to the IDW comics (though they never said where exactly she went).

Now, I want to let everyone know this will be the last chapter of the fic for 2024, there will not be a December chapter. Let me repeat that, there will NOT be a December chapter. The next chapter will not be published until at least the second or third week of January. To make up for the skipped month, you can vote for up to two ponies this time around. And you can all decide whether you want them to be two separate chapters, or one combo chapter. Whoever you vote for first will get a whole vote, and whoever you vote for second will get half a vote. Depending on whether others specify combining characters or not will determine if it's one joint chapter, or two separate chapters like when this fic debuted.

And this is just a friendly reminder that Starlight, Sunburst, Trixie, and Discord are among the characters ineligiable for consideration under any circumstances.

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family)

Characters previously voted on:
Derpy, Soarin - One vote
Sassy Saddles, Fleur De Lis, Party Favor - One half vote

Little Marble (Marble Pie)

Princess Celestia playfully gave Twilight's padded posture a pat, whilst speaking in that cooing, motherly tone of hers. "There we go, Twily. All nice and clean again. And you were only a little wet, I hardly would've noticed if you hadn't told me."

"W-well, I tried to use the potty, honest," Twilight admitted in what sounded like an only somewhat exaggerated tone of embarrassment. "I didn't want you to be mad with me, Mommy."

The sun princess smiled and reassured her fellow princess. "Twily, you know I'll never be mad with you for having accidents. It's why you're still in diapers, after all. And I don't want using the potty to feel like a chore to you. I only want you to do it if you really feel comfortable doing it. Not using it isn't something you should feel ashamed of, no matter what it is you do in your diapers."

"But I want to make you happy, Mommy." Twilight insisted with a smile.

Celestia just cooed. "I'm already happy as it is, Twily. I will always love you no matter what you do. Don't you remember that, my little pony?" Her tone of voice at the end sounded slightly concerned, revealing that underlying worry that she had not voiced to anypony else (not even to Luna, who as of yet had not said anything further about Twilight's mental state).

The padded princess nodded. "I do, Mommy. But sometimes I forget," She playfully swished her tail and giggled, before running off to grab Smarty Pants. "I'm back, Smarty Pants. Sorry I made you wait."

Smarty Pants just replied in that exaggerated tone of hers. "I don't mind waiting, Twily. When I'm with you, it feels like time stands still. Besides, I wouldn't want our playtime to be interrupted by a diaper rash."

The elder alicorn smiled anew as she then trotted up to Twilight, all the while summoning up some paper and a box of colored pencils. "Alright, Twily. Can I trust you to stay here and do some doodling for me? Mommy needs a little bit more time to get your surprise ready for you."

"Is it another playmate?" The padded alicorn asked in a hopeful tone.

The alicorn mare with a majestic white coat just flashed a knowing wink as she cryptically replied. "Wait and see. Just stay here and try not to make a mess, okay?"

Twilight gave a salute, before plopping promptly onto her padded posture, delighting in how it crinkled and compressed. She even briefly distracted herself by poking it with a hoof, making it crinkle and compress even more.

Satisfied that her fellow princess wouldn't wander off, make a mess, or otherwise get into trouble, Princess Celestia simply lit her up and disappeared in a flash of light.

Just like that, Twilight and Smarty Pants were alone in the bedroom. But neither of them really minded it much, Twilight simply grabbed some of the colored pencils out of the box with her hooves. She gave no thought at all to using her horn, even though she knew that usually when wielding pencil or pen she would normally use her horn for greater precision. This was one situation, however, where precision was not necessary. And so, she clumsily doodled with her hooves, no particular image was in her mind.

A minute or so later, there was another flash of light! Celestia reappeared in the bedroom in all her glory, and accompanying her was an earth pony mare with a turquoisish gray coat. Her grayish violet eyes were hidden behind her locks of two toned grey that matched her tail perfectly. And there of course was her cutie mark, three purple marbles, which just barely poked out through the thick, white diaper that was taped firmly around her hind quarters, hugging it tightly.

Twilight put down her pencils and looked up, eyeing the newcomer with a mix of shock and happiness. "Is that my new playmate, Mommy?!" She asked in a hopeful tone.

The padded earth pony whimpered and seemed to shrink from Twilight's gaze, retreating behind Princess Celestia with a clumsy waddle and a faintly audible "Eep!".

The alicorn princess with a coat the same white as the diapers just laughed lightly, before ushering the newcomer out. "Now now, Marble," She said in a reassuring coo. "There's no need to be shy. This is Twily. Go on, say hello."

Marble hesitated for a moment or so, before forcing out an "Okay, Mommy," in what sounded like a faintly detectable lisp. She then toddled forward, extending a hoof towards her fellow padded pony. "H-hi, Twily," She greeted as best she could. "I Marble. Nice to meet ya."

Twilight grabbed Marble's hoof and shook it quite gently. "Nice to meet ya, Marble," Then she blinked in surprise, and in a normal tone of voice asked. "But did you call Princess Celestia 'Mommy'? You know she's not actually your mommy, right?"

Marble whimpered again, but managed to force out. "Mommy cast a spell to make me see her as mommy," She then apologized, speaking somewhat normally. "Sorry. I'm still a little shy. I-I... I'm getting better at not being shy, but sometimes I need a little help. M-Mommy told about you and her do, and asked if I'd be your playmate. I... actually didn't hesitate to say yes. I kind of wanted to go back to diapers again."

The padded princes giggled. "Yeah, I know what you mean. Diapers are so comfy." She briefly swished her padded posture to emphasize her point.

Marble nodded back. "Mmhmm. So because Mommy cast that spell, you and I are family. I guess that means you're a big sister, just like Limestone, Maud, and Pinkie."

At that the padded alicorn excitedly exclaimed! "Oh my gosh! I never even thought of that! But you're totally right, Marble!" She started bouncing all around, all but shouting at the top of her lungs! "I get to be a big sister! I get to be a big sister!"

Celestia chortled as she gestured a hoof to temper her fellow alicorn's enthusiasm. "Easy, Twilight. No need to blurt it out for the whole castle to hear."

Twilight ceased in her bouncing, blushing as she did so. "Oh, sorry," Once she'd fully recovered from her brief bout of embarrassment, she then turned her attention to Smarty Pants. Using her magic, she grabbed the old doll and held it before her fellow padded pony. "Smarty Pants, this is Marble. She's gonna be my new little sister today. Isn't that lovely?"

"Wow, Twily!" Smarty Pants exclaimed in amazement. "You're a big sister now? You're growing up so fast. I barely even recognize you anymore."

Marble, for her part, didn't seem to be surprised in the least by how the doll was able to speak (or who was actually behind its voice). "Hi, Smarty Pants," She greeted with a wave, briefly blowing the bangs out of her eyes. "I wish I'd have known you were going to be here too. I would've brought Mr. Pebbles with me," As the bangs settled over her eyes, she whimpered slightly. "But I didn't even bring him with me to college. I was too afraid ponies would find him accidentally and make fun of me for still having him around. I don't really need him, but having him around helps me remember a simpler time."

"Hey, that's okay," Smarty Pants reassured the padded earth pony. "You can share me, just as long as you don't play too roughly. If you're a part of Twily's family, then that means you and I are family too."

The earth pony mare with a turquoisish gray coat just replied with another soft "Mmhmm.", smiling as she did so.

Twilight then took the liberty of asking her new playmate and "little sister". "So, what do you wanna do today, Marble? What do you like to do for fun?"

"Fun?" Marble blinked in what seemed like genuine surprise. She then put a hoof to her chin, appearing to be deep in thought. As she thought and contemplated, a brief bit of drool seemed to escape her lips. At last, she seemed to settle on an idea, and proposed as she turned to face her fellow padded pony. "We could play fort and have a camp out."

"But it's not night time," The padded princess pointed out as she looked out the window, seeing that it was at best just slightly past noon given the position of the sun. "And I already built a pillow fort once."

The padded earth pony mare just replied. "Well... we could make a blanket fort. And then we can pretend to camp out. We won't have to actually get dirty or set up tents."

"That sounds like a great idea!" Princess Celestia said with a coo. "I'll even help you two get set up. Then, that way, I can keep an eye on you both and make sure you don't get into trouble." And so it was arranged.

Working together with Princess Celestia, Twilight, Marble Pie, and Smarty Pants went around the bedroom. Together, they grabbed blankets and a few pillows off the beds. They then spread the collected blankets out on the ground in the middle of the room, creating a nice little area of soft blankets to lay upon.

Using their imagination, the padded ponies conjured up the image of a vast fortress in the middle of what was otherwise untamed wilderness. And of course, no fort would be complete without lookout towers, gates, and a place for the ponies dwelling within the fort to eat, sleep, and play (there was no need for bathrooms given that they were already wearing them. Besides, ponies living out in the wilderness just used nature as a toilet, though they had to be careful not to accidentally wipe with poison ivy or poison joke).

Soon, the great blanket fort was ready for its occupants to enter into it and camp out inside of its limits. Twilight, Marble, and Smarty Pants all waddled up to the fort's gates and stood before them.

The gates rose up before the trio of ponies wishing to enter the fort, and they wasted no time in waddling into the fort interior as the gates then slammed shut behind them. They were now safely within the blanket fort's confines, protected from the dangers of the surrounding wilderness.

Princess Celestia trotted up to the outer limits of the fort but a moment later, smiling as she watched her charges settle atop the many blankets and settling onto the pillows they had brought with them. She could very easily just waltz right in, there was nothing that stopped her from doing so. But she thought there would be no harm in humoring the two padded ponies (and Smarty Pants). So she cleared her throat and raised up a hoof, pretending to knock against the walls of the fort in order to demand that she be allowed to enter.

Smarty Pants was floated up towards the sun princess, eyeing her with what seemed to be suspicion. "Who is it?" She inquired in a gruff, almost authoritative tone of voice.

"It's me, Princess Celestia. I am here to bring supplies and reinforcements for the ponies inside." The sun princess replied.

"Just leave it all outside, we'll send somepony out to bring it all for us," Smarty Pants insisted. "Now go away!"

Celestia pretended to be offended by the suggestion. In a dramatic, exaggerated tone of voice, she exclaimed! "What?! You're ordering me to go away?! Me?! The very ruler of Equestria and the pony responsible for raising and lowering the sun?! I am a princess, royalty even! I deserve to be treated with more respect!"

Smarty Pants just waved a hoof, acting as if she were wielding a spear! And she repeated her earlier demand. "Go away! Your title means nothing here! Nopony gets inside this fortress after the gates are closed!"

"Oh really?" The sun princess retorted with what seemed like a playful, mischievous smirk that was spreading across her face. "Well I didn't come all this way with these supplies just to be told to leave," Eyeing the doll, she declared in an ominous tone of voice. "This is your last chance to avoid making a costly mistake. Let me in, and nopony gets hurt."

The doll refused to be intimidated. "Orders are orders. If you won't leave willingly, we'll just have to make you leave, by force!" She turned back towards the fort's interior and hollered at the top of her lungs! "Guards, ready your spears! We must drive this attempted invader away!"

Yet the alicorn mare with a majestic white coat only replied. "Big mistake." Then she lit up her horn, and in the blink of an eye teleported right into the middle of the fort and was standing right in front of both Twilight and Marble Pie.

Twilight and Marble Pie exchanged mutual gasps and looks of horror! They now found themselves completely at the sun princess' mercy.

"What naughty foals you are, trying to attack your mommy," Princess Celestia playfully scolded as she quickly lit up her horn and pulled her charges close. "And you know what naughty foals like you get?"

Twilight whimpered, kicking all about in her pampers as she pleaded. "No, Mommy! Please! We didn't mean it!"

"Please, Mommy, have mercy!" Marble pleaded.

Celestia just replied with a giggle, then took a deep breath as she brought her mouth towards Twilight and Marble's chests. "Say hello to my little friend: The tickle monster!" She exclaimed, and then proceeded to promptly blow raspberries all over their stomachs, making her padded charges squirm and giggle with uncontrollable laughter.

"S-stop! Please!" The two padded ponies tried to plead in between fits of laughter. Alas, their pleas went unanswered, the tickling continued without end. They were laughing so much and so hard that they were starting to get tears in their eyes.

Meanwhile, Smarty Pants could only look in horror! She was powerless to stop the merciless tickle attack.

Suddenly, amidst the howls of hysterical laughter, a new sound filled the air. It started quietly, but grew louder and more noticeable by the second. It was a hissing sound. And it was accompanied by noticeable dark patches that were appearing on both Twilight and Marble's diapers. The patches first appeared near the seat of the padded undergarments, yet slowly expanded until both diapers were completely swollen and darkened. Then and only then did the tickle attack finally stop.

"Whoopsie daisy!" Princess Celestia teased. "It seems my foals couldn't hold it in and opened their floodgates. Thank goodness I had them diapered, or they would've peed on my nice clean floors."

Marble threw her hooves over her face in shame and embarrassment. "Sorry, Mommy."

The elder alicorn just smiled, gently reassuring the soggy padded ponies. "It's alright, you couldn't help it. And it's not good to hold it in all the time," Then, lighting up her horn once again, she carried both foals away. "Let's just get you both changed and cleaned up. Then we can resume your little camp out together."

Princess Celestia was quick as a flash when it came to the diaper changes. In no time at all, she had wiped both Twilight and Marble's soggy rumps clean, and had strapped them up into fresh diapers. "All done." She said with a smile, patting both padded ponies gently on the forehead.

Twilight and Marble then wasted no time in returning to their blanket fort, and were quite relieved to be allowed back in without a fuss. They soon resumed their camping out spot in the middle of the fort, protected by the walls and the guards.

Marble sighed as she lay back upon her pillow, gazing up towards the open sky (in actuality the ceiling). And for the moment, she seemed content to just lay there, her padded posture sticking up for all to see. She didn't seem to have a care in the world or a thought in her head.

The padded princess smiled as she saw fit to imitate her playmate's overall posture. Then, after a moment or so, she decided to break up the unofficial spell of silence by saying to the padded earth pony next to her. "You're really good at this, Marble. It's like you've done this all before."

Marble turned her gaze ever so slowly towards Twilight, once again blowing the bangs out of her eyes. "W-well," The words seemed to be slow to leave her mouth, as if it was hard for her to gather her thoughts. "I'm... sure you already know from my other sisters. We didn't really have diapers or foal toys growing up. The diapers we did have were second hoof, hoof made and passed down from other branches of our family. That's how Granny Pie came to live with us, she was there to help Mom and Dad after Pinkie and I were born so that Mom and Dad could spend more time with Limestone and Maud."

Twilight nodded, remembering what she had picked up from Pinkie, Maud, and Limestone. It would seem that the simplicity of the Pie family's rock farming lifestyle extended even into places where you might have expected some deviation to include modern conveniences.

The earth pony mare with a turquoisish gray coat shut her eyes as she continued, appearing to draw on memories long since passed. "Of course, once we got the flush toilet installed, we had to learn how to use it. And Maud was the first one to really figure it out. Limestone, meanwhile, kept teasing me about how there was a monster that lived inside of it and ate foals. It was only later that I learned she was doing it because she was jealous of Maud and Pinkie for mastering use of the flush toilet before her. And she wanted to try to keep me from beating her in that regard."

"Yeah, older siblings can be such poopy heads sometimes," Twilight giggled. "B.B.B.F.F. was a lot of fun to play with. But sometimes he could get super competitive, and always boasted whenever he won at anything. Turns out, he had a lot of development issues growing up, which he seemed to forget about whenever he made fun of me growing up."

Marble let out a sigh, opening her eyes slightly. "Well, Limestone did eventually apologize. She's actually kind of nice if you get to know her. And she does do a good job keeping the rock farm running so that Mom and Dad don't have to worry about it. She didn't even put up a fuss when I went away to college, leaving her to live on the rock farm with just Mom and Dad for company. But I'm sure even she gets lonely sometimes, she's just too proud and stubborn to admit it. As for me," She looked to herself and to her padded plot that was still sticking up in the air. "Being in college has given me a lot to think about?"

"Is it true you went back to diapers because you were wetting the bed?" Smarty Pants asked. The doll had by now given up on her patrols and had settled in next to Twilight, apparently content that the fortress would do its job of keeping unwanted guests away.

The padded earth pony nodded, blushing slightly as she did so. "Yeah. And I was really glad when Maud wore diapers to get Limestone to stop teasing me. I know that couldn't have been easy for Maud to do, given that she had the fewest problems with growing up and getting out of diapers. Of course, I eventually grew out of bed wetting and gave up diapers again. At the time, I thought I'd never want to wear them ever again, let alone actually use them. But after I went away to college, I found myself starting to long for the carefree times I associated with diapers. So I started wearing them in secret in my dorm room. And now," She dreamily sighed. "Now I'm wondering why I ever thought getting out of them was a bad idea. Don't get me wrong: I'm glad I was potty trained. But being back in diapers just feels so much better."

Twilight nodded back and smiled. "Well, it's a good thing you have me and Mommy. Here, you can be in diapers and do whatever you want. Everything's taken care of for you."

Smarty Pants chimed in. "You're a lot nicer and quieter than some of Twily's other playmates, Marble. You really are a good little sister."

Marble seemed taken aback by such a statement! As the bangs settled over her eyes once again, she asked the padded princess and Smarty Pants. "You really think so?"

Both Twilight and Smarty Pants nodded as Twilight then declared. "Think so? I know so, Marble."

Marble smiled as she sat up all the way, then waddled over to her fellow padded pony and gave her a hug. "T-thank you," She spoke, slowly sliding in that lisp she had briefly displayed earlier. "You so nice, Twily."

The padded alicorn just returned the hug full force and said nothing at all.

Princess Celestia then broke up the silence by clearing her throat, revealing several large trays held aloft in the soft glow of her horn. "I hope you're hungry, my little ponies," She cooed. "Because I have brought enough food to fill an entire ballroom. We are going to feast!"

Twilight sniffed the air, her mouth watering at all the tempting and tasty treats that she could smell. She couldn't wait to consume them.

Celestia promptly floated the trays over, placing them in the middle of the blanket fort as she moved to sit down. She then floated over some bibs, tying them around the necks of both her charges. "Don't want my foals making a mess." She smiled, before lifting up the lids of the trays one by one.

Freshly cut fruits and vegetables rested on the trays, as did several large jars of different flavored foal foods, not to mention fresh applesauce. The only form of refreshment that appeared, however, were two large baby bottles filled to the brim with what appeared to be warm milk.

The sun princess proceeded to unscrew the lids of the jars of foal food and dip plastic spoons into the colored goop. "Alright, my little ponies. It's time for your num-nums. Now open wide for the aeroplane."

Marble and Twilight fully cooperated as the various flavored foods were deposited onto their tongues. Savory sweet tastes such as bananas, pumpkin, potatoes, and even sweet corn all tempted their taste buds. It was overwhelming in a good way! And the applesauce they were served afterwards was just as delicious. Then they were given their bottles of milk to wash it all down. And the milk's rich, creamy taste made it hard for them not to drink down the entire bottle's worth. Lucky for them, Princess Celestia took the bottles away when they were half empty. "If you drink down all your milk, you won't have any left for the fruits and veggies." She told them, then sat back and let them take hold of the remaining food with their hooves.

Twilight paused momentarily in her eating as she saw fit to ask something she had noticed about the milk. "Mommy, did you put your milkies into our bottles?" She inquired of her fellow alicorn.

Princess Celestia happily nodded. "Of course, Twily. I need to make sure my foals get their nutrition, after all."

"Ah, that's why the milk tasted so good!" Marble exclaimed as she licked her lips. "Although, I remember that my other mommy used to put little bits of crushed rock into my bottles. She said it helped my teeth and my jaw grow up big and strong. And she was right."

"Hm, perhaps I should consider doing that from now on to help Twily's teeth and jaw." The sun princess pondered, before turning her attention back to Twilight.

The padded ponies were amazed soon afterward when, even after eating all the fruits and veggies and drinking down the rest of their milk, they still didn't feel quite "full" just yet for lack of a better term.

The sun princess seemed to know this. Because she stood up slowly, lit up her horn again, and declared. "I believe my foals have earned a special treat for being so well behaved today." She then brought forth a tray that held a large, goopy substance colored a dark brown.

Both padded ponies' eyes went wide as they exclaimed in unison! "Chocolate pudding!"

The alicorn mare with a majestic white coat smiled as she gave a confirming nod. "Indeed it is. Go ahead, eat up."

Twilight and Marble needed no further incentive, and dug into the chocolate pudding with their bare hooves. They seemed not to care for how much of it they were smearing on their faces and on their bibs. It was too irresistible for them to think about eating carefully. They just devoured as much of the pudding as they could, until their stomachs felt so full they could burst. Then and only then did the two padded ponies rest, giving out hearty belches as they seemed satisfied with what they had done.

Celestia just giggled, before floating over a prepared wet rag colored red and using it to wipe the face of both diapered ponies. After that, she watched as both mares waddled around the fort for a little bit, before yawning. All that food and milk was working like a charm. So she just floated over some additional blankets, and made sure Smarty Pants was securely tucked into the hooves of Twilight. Then she kissed both Twilight and Marble on their foreheads, gently cooing. "Sweet dreams, my little ponies." She then rose slowly from her current position, trotted to the light switch, and flicked it off in order to cast the entire bedroom into darkness.

This little playdate/sleepover had gone off without a hitch. And she was already thinking of how she could repay Marble for having played her part so willingly in spite of needing a little bit of magical assistance to come out of her shell.

The next day, Marble Pie woke up in her dorm room in Fillydelphia, yawning as she wiped the sleep out of her eyes. Yesterday had been the most fun she could readily recall having in many years.

To the earth pony mare with bangs' surprise, there was what appeared to be a letter of some sort sitting on a small stand near her bed. Being naturally quite curious, she picked it up and examined it carefully. It read as follows:

Dear Marble Pie,

Thanks again for agreeing to be Twilight's playmate, and for agreeing to keep her secret a secret. I'm sure you need no incentive to avoid sharing it with ponies not already in the know. And I know it couldn't have been easy to let me help you feel more comfortable and at ease.

Rest assured, everything you shared with Twily and I yesterday will stay our little secret. We won't tell a soul to anypony who doesn't already know.

However, even though I'm sure you don't need any sort of reward, I still feel like you deserve something to help me express my gratitude. So I took the liberty of arranging for some very special guests to come over for a very special party just for you. Hope you enjoy it.

Yours truly,

Princess Celestia

Marble put down the note and felt her heart skip a beat! "Could it be?!" She thought to herself as she tried to think about who the sun princess was referring to.

Those thoughts were soon interrupted by a knock at what the earth pony mare only now realized was in fact an otherwise empty dorm room. Of course, everypony else had gone home for the holiday. And she had been planning to do the same, before Princess Celestia had by chance asked her to be a padded playmate for Twilight.

Come to think of it, how had the sun princess even known to ask Marble in the first place? Marble was so sure she had gone to great lengths to keep hidden her secret about wearing (and sometimes using) diapers. So how had Celestia of all ponies managed to find out without needing to ask Marble directly? It couldn't just be a lucky guess.

As the turquoisish gray coated earth pony mare pondered this and other puzzles, she nevertheless reached the door of her empty dorm room and opened it. And what she saw waiting for her on the other side made her eyes widen in disbelief! It was too good to be true!

Standing there, clad in nothing but thick, white diapers, were all three of Marble's older sisters: Limestone, Maud, and Pinkie. Maud had even taken off that tunic she was always so fond of wearing.

Pinkie Pie was the first one of the three padded sisters to speak up! "Hiya, Marble! Princess Celestia told us we might find you here!"

"W-what?!" Marble blinked slowly, trying to process her complex emotions.

Limestone giggled as she trotted forward, grabbing hold of Marble and pulling her close. "Hey, there's no need to hide it. We're all back in diapers now. And we know you've wanted to go back to them too. So thanks to a certain somepony tipping us off, we decided to visit you and have a diaper party."

"It was Pinkie Pie's idea," Maud pointed out. "And this way, we don't have to go on hiding our secrets anymore. We were gonna have it at Sugarcube Corner now that Pinkie's in charge of it. But she felt it would be better to come here and hang out with you, seeing as we haven't really gotten together as a family in a long time."

Marble was utterly speechless! She couldn't think of anything to say!

Pinkie smiled. "I know, I know. It totally freaks your frizz, Marble! Sorry we didn't write to you sooner, but I wanted it to be a surprise. So... surprise!"

Once the shock of the sudden revelation wore off, Marble Pie managed to force out with a sheepish smile. "T-thank you... all of you. It means a lot that you'd... well... you know. You really didn't have to."

"Hey, what are sisters for?" Limestone pointed out with a playful giggle. "Besides, we can all see why you like diapers. It's nothing to be ashamed of."

"So you should go get changed, Marble," Maud encouraged with something of a smile. "We're going to have so much fun together."

And indeed, Marble needed no further incentive to slip back into her dorm room. She dove right under her bed, and without bothering to make sure nopony was around she quickly pulled out an already opened box of Silly Filly brand adult diapers. In a matter of seconds, she had taken hold of a fresh diaper from the box, and effortlessly taped it around her rump so that it hugged it tightly. Now she was ready for another padded playdate: One spent with all of her sisters.

Was this a dream? No, Marble knew in her heart that it was real.

Little Sun Bun (Sunset Shimmer)

Author's Note

Once again, inspiration comes from Scootabom1, who proposed the idea of Sunset Shimmer with Moondancer as a caretaker. The idea being that it's a book Sunset made for a project found among some old stuff from when Sunset was young, culminating in a snowmobile chase and a rocket launcher, and then Sunset in either a bouncer or a highchair with a messy face, telling Princess Celestia how she did. And he specified that it would be done through Hayscartes' Method.

I also borrowed a bit of headcanon from Latecomer regarding Sunset's family situation in Equestria, namely who Sunset's mother was. And I also lifted a scene from Sunset's prompt in "Potty Training Tales".

Last but not least, this chapter is a very indirect tribute to Britt Allcroft, the creator of Thomas the Tank Engine and Friends, whose death was announced just days ago. The indirect dedication here is because this chapter involves a story and a world created by characters through magic, and Britt was very much a powerful story teller through the creative talent she assembled to work on the original model series.

As always, feel free to pitch not only suggestions for playmates but also what these playmates can do with Twily.

Characters that can only be done in specific group pairings:
Spike (with mane six, Princess Cadence, or Sparkle family)
Shining Armor (with Princess Cadence, or Sparkle Family)
Rainbow Dash (with Spitfire, mane six, or any Wonderbolts besides just Soarin)

Characters previously voted on:
Derpy - One vote
Sassy Saddles, Fleur De Lis, Party Favor, Flutterbat - One half vote

Little Sun Bun (Sunset Shimmer)

"Guess what, Twily?" Princess Celestia said the next morning as she came cheerfully trotting into the bedroom to check on her fellow princess, already all padded up. "I have a special surprise for you. And it all has to do with your next playmate."

Twilight let out an excited gasp! "Who is it, Mommy?! Who is it?!"

The sun princess chuckled. "You'll see," She flashed a knowing wink and then turned to the bedroom door that was flung open. "You can come in now," She called out to the distance. "I trust you brought everything needed?"

A familiar feminine voice called out. "You bet I did. I knew that once I found it, I had to bring it to your attention." And in strolled none other than Moondancer. Compared to last time, she was wearing her usual black jacket and had let her mane and tail be styled back to how they'd been since Twilight had gotten back in touch with her. She was also wearing a cream colored onesie that matched her coat perfectly (though still with a telltale bulge that indicated the presence of a diaper). Held aloft by the light pinkish-gray glow of her horn was a very old, very dusty chest a faded shade of red. And it had clearly seen better days. It seemed like it had not been touched by anypony in years.

The padded princess blinked slowly, trying to process this development. "You're my playmate again, Moondancer?" She asked the cream colored unicorn.

Moondancer shook her head from side to side. "Oh no, not this time. As tempted as I might be to join you and Smarty Pants in another playdate with Mommy," She briefly looked across to Princess Celestia. "I've been too busy studying Hayscartes' Method to even think of taking a break. I'm really close to getting it down pat. And now, Princess Celestia has given me the perfect opportunity to demonstrate just how much of it I've really learned."

"So, where's my playmate, then?" The diaper wearing alicorn questioned as she looked all around.

Smarty Pants looked too. "I don't see anypony, Twily. Maybe they're invisible?"

But Celestia playfully chuckled as she shook her head in retort. "Oh no no no. Don't be silly. Your playmate isn't invisible. And they're not running late either," She gestured to the chest Moondancer was holding up, explaining. "Your playmate is right in here."

Twilight stepped back and blinked, trying hard to process the information. There had to be something about the chest that would tell her the identity of her next playmate. "Inside the chest?" She asked, and received a confirming nod. With some hesitation, she then waddled towards the chest for a closer look as it was set upon the bedroom floor with an audible thud (a small cloud of dust being kicked up as a result). If she squinted just right, Twilight Sparkle was certain she could make out the carving of what appeared to be a shimmering sun. Where had she seen such a symbol before?

Princess Celestia and Moondancer opted not to say a word, content to let the padded princess in their midst figure out this little mystery all on her own.

Twilight walked all around the chest, deep in thought. "Smarty Pants, help me out here," She said to the old doll. "I swear I've seen that symbol before somewhere. It looks like Mommy's cutie mark, but I know it's not."

"What do you mean, Twily?" Smarty Pants babbled. "It's a carving of a sun. And Mommy's cutie mark is the sun."

The padded alicorn shook her head and replied. "But it's not a shimmering sun. Plus, why is it red? Mommy is white, like my diapers." She then sat down on her padded haunches, putting a hoof to her chin as she tried to think. Why was this so hard for her to figure out?

The sun princess had to hold back the urge to chuckle. "Give up, Twily?" She asked her charge.

But the diaper wearing princess didn't reply. She thought, and thought, and thought some more. Then, suddenly, like a lightbulb that had been switched on, it came to her! She stood up and proudly declared! "I've got it! I know who this chest belongs to! It belongs to Sunset Shimmer!"

Celestia and Moondancer both clapped their hooves in approval, applauding Twilight's discovery!

"Sunset Shimmer?" Smarty Pants pondered aloud. "Isn't she that pony who tried to steal your crown at the Crystal Empire, Twily?"

Twilight playfully giggled. "Smarty Pants, you know she's not that same person... er pony anymore. She's changed. I've seen it with my own eyes," She then commented. "But I wasn't aware she was coming here to play with me. She never mentioned anything about it in the journal we share."

At that, a faint hint of sorrow and regret crept into the elder alicorn's tone of voice and she spoke slowly. "Well... I was hoping to have her here. I even wrote specifically to her like you told me to. Alas, I never received any sort of reply. I guess Sunset is still afraid to come back and show her face to me after the way we parted. I had hoped we could reconcile the way Luna and I did after she stopped being Nightmare Moon. But it seems Sunset isn't quite ready to be anywhere in my presence just yet. A shame, really. Even if we weren't as close as you and I are, Twily, I still came to regard her as family." She struggled not to shed even a single tear.

The padded princess trotted over, hugging Celestia tightly. "It's okay, Mommy. I'm sure you'll see Sunset Shimmer again someday. She just needs time."

Moondancer then cleared her throat. "Yes. And in the meantime, that is where I came into the picture in regards to this playtime," She pointed a hoof to the chest as she explained in detail. "You see, while I was studying Hayscartes' Method more in depth, I made a lot of journeys to the royal archives and to Starswirl the Bearded's former study. While I was on my way back from one such journey, I took a wrong turn and stumbled across this old chest by pure chance. Upon examination, I quickly deduced that it once belonged to Sunset Shimmer. And it features many things from her earliest years under Princess Celestia's wing."

The sun princess then focused her magic on the lock holding the chest shut, slowly undoing it. "Moondancer was kind enough to bring it to my attention and allow me to examine its contents personally. Inside of this chest, I discovered something that would allow everypony to get what they wanted: Moondancer could demonstrate how much she's learned about Hayscartes' Method, I would get to see Sunset again, and you would have another playmate, Twily." Seconds after she had finished speaking these words, she fully undid the lock on the chest and opened it all the way.

Once opened, the chest's contents spilled out onto the floor in noisily, disorderly fashion. It was mostly the stuff you'd expect a little filly to have: Stuffed animals, crayon and colored pencil drawn sketches (some depicting a crude image of Sunset herself, others a crude image of Princess Celestia or other ponies of importance), a copy of various grade reports or papers that were worth bragging about, and several books and scrolls. The books themselves were almost all childish and foal like in their presentation and subject matter, though surprisingly there were a few of the early Daring Do books mixed in even though that wasn't really a series that foals were usually into (the junior book Daring Do and the Temple Toilet being the exception).

The elder alicorn couldn't stop herself from giggling with giddy excitement when she observed all the things that now lay scattered on the floor. "My goodness, I'd forgotten how messy and disorganized Sunset could be. Ironically, she was the daughter of one of the best maids in the castle: Sunbeam. Yet it would seem Sunbeam's dedication to keeping things neat and tidy did not rub off on Sunset. Even in her later years, she was not one for organization."

"Was she in diapers when you met her for the first time, Mommy?" Twilight asked, somewhat curious.

Celestia chuckled a bit as she tried to regain her composure. "Oh no, she had long since graduated from them. She'd even gotten her cutie mark before I'd even thought of taking her under my wing. But I do remember that, at least at first, she would look up to me and admire me. I suspect she saw me as more of a mother than her actual mother, likely because Sunbeam was always so busy," She then began examining the books on the floor, picking them up one by one and glancing over their titles before carefully setting them aside. "Now, I know that somewhere in this clutter lies a very special book that Sunset wrote entirely herself as part of a class project. It was what first made me take notice of the potential she showed."

Moondancer cleared her throat, holding aloft a bright red book with what appeared to be a black and white image of a giant ram wearing a large collar. Directly underneath the ram's gaze was a hastily sketched image of a filly Sunset Shimmer. "I believe this is the book you're looking for, Princess Celestia." The title of the book read as follows:

How I Saved Hearth's Warming

By Sunset Shimmer

The sun princess immediately rushed over, clearly excited by the discovery! "Ah yes, that's the one!"

At that, the padded alicorn adopted the most perplexed look as she sat upon her padded posterior. "Isn't there already a book about saving Hearth's Warming? I know it's not A Hearth's Warming Tail. But I feel like I've read a book like that one before."

Princess Celestia nodded and smiled as she carefully took possession of the old book. "It is an adaptation of a beloved children's classic How Gusty the Great Saved Hearth's Warming, itself believed to be a Hearth's Warming version of the story of Gusty the Great's battle with Grograr, which apparently took place very close to Hearth's Warming Day eons ago. From what I was told after Sunset wrote this book and submitted it to her class, she wanted to create a more 'awesome' and 'epic' version of the story, and put herself into the lead role."

"Sounds a lot like that unfinished novel Rainbow Dash said she was working on once." Smarty Pants remarked.

Twilight made a shushing motion to the old doll. "Smarty Pants, you're not supposed to tell other ponies about that! Rainbow Dash wanted it to stay a secret."

At that, Moondancer couldn't help but blush. "W-well, she's not the only one who wanted to write stories about herself as a hero. I did that too..." She coughed into a hoof and quickly corrected. "Er... o-only as a way of testing Hayscartes' Method, of course."

Celestia then smiled as she approached Twilight and explained. "I'm sure you must be very curious as to how Sunset's story plays out, Twily. Well, with help from Moondancer, you're going to experience it first hoof. You will be joining Sunset within the contents of the book. But don't worry, you'll be perfectly safe. After all, you know that children's stories must always have a happy ending."

"But she'll see in diapers!" The padded princess exclaimed! "She'll make fun of me for sure!"

The sun princess reassured her troubled fellow alicorn. "No she won't, Twily. She's part of the book, she won't really have a mind of her own. Hayscartes' Method will make it seem like you were always part of the story, and she will react like you've always been there. Only Moondancer and I will know the truth," She then leaned close and whispered. "Although, I do have one request I must ask of you."

The diaper wearing alicorn asked without hesitation. "What is it, Mommy?"

Her cheeks flushing and turning a bright hue of pink, Princess Celestia all but whispered. "Could you perhaps, after the story is done, convince the Sunset within it to come back with you? Since Sunset herself isn't here, a version of her contained within the book is the next best thing. And I'd really like a chance to be able to do with her what I've done with you," As a lone tear came into her eyes, she explained further. "I've always felt that if I'd just been more open with Sunset like I've been with you, we wouldn't have had our time together come to an end the way it did. Knowing since that Sunset Shimmer saw me as like a second mother, I'd really like the opportunity to treat her as if she were my foal."

Twilight listened to the request in full, then gave a firm salute and promised. "Don't worry, Mommy. I'll bring her out of the book for you! I won't let you down, I promise!"

The alicorn mare with a majestic white coat smiled and beamed happily. "Thank you in advance, Twily. I knew I could rely on you," She then carefully eyed her charge and asked her. "But before you dive in, do you perhaps think you should try to use the potty? It may take a while for you to get through the book. Once the story starts, you can't leave until it's finished. That means you won't be able to take a break for anything."

The padded princess shook her head and dismissed the suggestion. "I'm good, Mommy. I don't need to use the potty. I'll be fine until I can make it out of the book. And even if I do end up going potty in my diapers, you'll just change me like you always do, right?"

"Of course, Twily," Celestia nodded back. "Should that happen while you're in the book, you needn't worry. Only you will know you've gone potty." She then released her hold on her fellow alicorn and trotted over to where Moondancer was standing. Yet in the back of her mind, she couldn't help but think. "Twilight's not making as much of an effort to use the bathroom like a normal pony. I know she's getting more and more comfortable using her diapers, but she's not actually giving up on using a toilet all together is she?" The alicorn opted to dismiss those concerns, at least until she could have another talk with Luna and see if these concerns were valid and worth worrying about.

Moondancer, meanwhile, eyed Twilight in all her diapered up glory and simply asked her. "Are you ready to begin, Twily?"

Twilight nodded, holding Smarty Pants tightly in her hooves. "I'm ready! I can't wait to see how this all plays out! This is going to be so much fun!"

The glasses wearing unicorn mare then instructed to Princess Celestia. "Okay, we're all set and ready to begin. Please set the book down and open it to the first page. I'll take it from there."

The sun princess obeyed, carefully depositing the old book onto the bedroom floor and flipping it past the cover to the very first page. It showed an image of what appeared to be a small village occupied by earth ponies, pegasi, and even unicorns.

Moondancer then shut her eyes, concentrating deeply as sparks began to fly from her horn! She slowly but surely enveloped Twilight and Smarty Pants within light pinkish-gray tendrils, pulling them towards the book. Then, with a blinding flash and a poof of smoke, both alicorn and doll disappeared from sight, only to reappear inside the book's first page! Moondancer slowly opened her eyes, breathing deeply and wiping the sweat from her brows. "It... worked." Was all she could bring herself to say, as she then moved to sit down (causing the diaper in her onesie to give itself away with an audible crinkle).

Twilight and Smarty Pants slowly got their bearings, taking in the sights as they now found themselves within the village in the book. They could see the three pony tribes, all depicted in inky sketches of black and white, and all of them gathered around a tree in the middle of the village. They appeared to be singing a song of some sort while presents rested underneath the tree, but the song itself was impossible to make out. It was as if the ponies were singing in a language that only they could understand.

Just then, who should come trotting up to Twilight and Smarty Pants but a unicorn filly with an unmistakable cutie mark depicting a shimmering sun? "Hi," She spoke in a cute, high pitched tone of voice. "My name's Sunset, but you can call me Sun Bun."

"Hello, Sun Bun," Twilight greeted the filly, surprised to find that she had herself shrunk down quite a bit to be the same size as Sunset Shimmer. "I'm Twily. And this is my friend, Smarty Pants," She made the old doll wave and then whispered. "She's not much of a talker."

Sunset Shimmer just giggled. "That's okay. I'm glad I got to meet you, Twily. You're just in time."

The alicorn princess blinked. "In time for what?" She questioned. She had a pretty good idea of what Sunset was talking about, but decided it best to play along for the time being.

As if in response to that question, there came a frightening roar! The three pony tribes that had just a moment ago been standing and singing beneath the tree now scattered in every direction, and not one of them thought to grab the presents! All the while, it was possible to hear a voice speaking above the chaos. "It is said that everypony in the newly established land of Equestria liked the holiday of Hearth's Warming a lot. But the evil Emperor Grogar, father of monsters, did not. He hated Hearth's Warming with a passion, though no one quite knows the reason why."

Suddenly, as if a page had been turned, the scene changed! The very ram that had been depicted on the book's cover now appeared, rendered in the same art style as the ponies. He moved quickly to snatch up the presents, and then touching a hoof to his collar he shot out an orb that set the tree alight! In seconds, it had burnt down to ash. "I am taking away these silly presents!" The ram roared. "I, the mighty Grogar, am taking back what is mine. You ponies will rue the day you thought you could take over my domain uninvited!" He promptly floated the presents into a large sack, and then ran away with the sack being carried behind him on his back.

As Grogar turned and fled, the voice from before stated simply. "Whatever the reason for his hatred of the season, Grogar swept down upon the village and ruined its Hearth's Warming celebration. Yet as he turned and fled from the scene of his crime, his stolen presents in tow, one brave little filly decided to take a stand."

Sunset Shimmer then trotted toward the charred remnants of what had been a splendid tree and stood before it. With a look of fiery determination, she vowed! "I'm going to get back all the presents that were stolen! I'm going to save Hearth's Warming from that nasty old ram!"

"So it was that little Sunset Shimmer, herself just a child, set off alone on a most daring adventure with her goal clear in mind." The voice narrated as the page turned, showing the filly trotting through heavy snow and leaving tiny little hoofprints behind with every step she took.

Twilight and Smarty Pants followed the action close behind, trotting after Sunset and trying to call out to her. Yet they received no reply, either because of the strong winds or because they had to go along with the book. Yet they would not be deterred, they were determined to help their new friend face a foe that would make even the bravest of hearts tremble with fear.

As for the filly herself, she bravely pressed on despite having nothing on her to protect her from the harsh winds and the blinding snow. Fortunately, she easily kept herself warm by lighting up her horn, casting a spell that melted the snow around her.

In the blink of an eye, the unicorn filly had made her way up the side of a huge mountain. Accompanying her movements, the voice from before narrated. "Following the fearsome Grogar's hoofsteps, brave little Sunset, now calling herself Sun Bun, ascended the mountain the evil goat called home. She eventually found that he had nestled in for a long winter's nap deep inside a cave at the very top of the mountain." And then the scene changed as Twilight and Smarty Pants found themselves moving along with Sunset Shimmer, who was gingerly tiphoofing her way through the dark, dimly lit cave.

Trying hard not to make a sound, Sunset made a shushing motion with her hooves and whispered. "I must be very, very quiet. I don't want to wake up Grogar." As she spoke, it was possible to hear loud snoring echoing through the cave, adding to the eerie, ominous atmosphere.

Twilight shuddered with fear in spite of herself. "Everything I've ever read about Grogar tells me that he's too dangerous to even go near." She murmured, now regretting her earlier decision not to go to the bathroom before starting the story. Alas, she knew it was too late to back out now.

Fortunately, the voice narrating the story (which sounded a lot like Moondancer's voice) said in an upbeat and cheerful tone. "Sun Bun knew she had to move fast if she was to get back the presents and leave before Grogar woke up. Fortunately, she found the sack with the presents inside laying in a corner within a crevice where Grogar lay fast asleep. She crept towards the sack as she floated it over through the use of her horn, struggling not to drop it when she felt how heavy it was."

Sure enough, the filly groaned and grunted, and her horn almost twitched. The scene she was in now played out with her slowly dragging the heavy sack of presents along the floor of the crevice, all the while Grogar himself could be seen sleeping upon the ground. His eyes were shut tight, his snoring was so loud it made the whole cave shake. Yet he didn't seem to wake up, he appeared to be in a very, very deep sleep.

"Oh, I hope Sun Bun can make it out of there okay!" Smarty Pants nervously whispered. "If Grogar wakes up and finds her here, he'll surely capture her and keep her prisoner forever!"

"Smarty Pants, not so loud!" Twilight frantically whispered back!

Yet Sunset Shimmer didn't seem to acknowledge the noise or the commentary from the others, at least not until she was already nearing the cave entrance. "Hey, new friends, why are you here?! Did you come to help me save Hearth's Warming?"

Both alicorn and doll nodded, and Twilight Sparkle declared. "Yes, we're here to help, Sun Bun. We have to get out of here before it's too late."

The filly Sunset groaned. "Duh, you think I don't know that? If I could just teleport like all the great sorcerers, this would be a piece of cake. Now stop talking and start helping me with this sack, it's so heavy!"

Twilight and Smarty Pants followed Sunset, pressed into service as they trotted behind her to ensure that no presents fell out at any point. Slowly but surely, the cave entrance and the light of the outside drew near to them. They were almost out!

But then, suddenly, the whole cave started to shake and rumble ominously, as the voice from before declared in a dramatic tone! "Sun Bun was almost out of the cave, when suddenly she felt a rumbling, tumbling sensation that she knew wasn't coming from her! That meant only one thing: Grogar was waking up, and he was finding out that the presents he'd stolen were not where he'd left them. And mean old Grogar wasn't about to let this little thief get away, not if he had anything to say about it."

With a strangled, frantic "Eep", Sunset Shimmer made a mad dash for the cave entrance, the sack dragging behind her and bumping against every jagged rock or rock formation it came into contact with! Every bump caused small scratches to appear that gradually morphed into holes. The whole sack threatened to rip open and spill its contents at any moment!

All the while, a voice cried out from afar, sounding deep and menacing! "Fee, fy, foe, thumb! I smell the blood of ponies! Be they alive or be they dead, I'll grind up their bones to make my bread!" There was no mistaking who it belonged to, it was from Grogar himself! And it sounded like he was drawing nearer with every breath!

Luckily, just before Grogar could reach the thief making off with his sack of presents, the page turned as the brave (yet terrified) little filly managed to escape from the cave. Yet she now found herself facing a dilemma: How was she going to make it back down the mountain with the presents before Grogar could catch her?

Twilight and Smarty Pants were right on Sunset's tail, and they joined her in quickly looking all around to find the fastest way to get down the mountain. They knew they couldn't just walk down: Grogar would easily overtake them. They needed to find some other means of transport, and fast!

The dramatic voice continued to state aloud. "Sun Bun had escaped Grogar's clutches for the moment. But she knew she had to find a faster way to get down the mountain, or else her hard work would all come to naught. She looked all around, searching high and low. And that's when she spotted it, right out of the corner of her eyes."

Sure enough, just as the voice had finished speaking, little Sunset let out a gasp and pointed a hoof! "There it is!" She ran over to what could best be described as some kind of motorized vehicle that had giant skis and a large wheel-like thing underneath its body. "With this self-propelled snow thingy, I'll escape from Grogar!" She jumped onboard, quickly strapping on a pair of sunglasses. "This is gonna be fun!" She said with a smile and a grin. Then using her magic, she turned a knob, and the vehicle's engine began to rev up.

"Wait, don't leave us behind!" Smarty Pants and Twilight both yelled as they frantically ran to and jumped onboard the vehicle just as it began to speed away! With snow flying all around them, they were quickly given matching pairs of sunglasses by the driver of the vehicle, and slipped them on.

"The little filly had just started her descent, still holding onto the presents so tightly," The voice continued to narrate. "When suddenly, who should come gliding down the hill after her but the mighty Grogar himself?! He was getting closer and closer with each passing second!"

And indeed, Grogar was fast catching up to the little vehicle, even as it was clear that said vehicle was going as fast as it possibly could! "You foolish ponies! I am Grogar, I am all powerful! No one is stronger than me! No one! You fools have only earned the fate of being crushed by my incredible power!" He roared as he began building up power through the orbs on his collar, and as a bell hanging from his neck began to glow brightly and ominously.

Yet where one would've expected the little filly in the driver's seat to be afraid and frightened, crying for her mommy, Sunset Shimmer was brave and defiant. She didn't seem the least bit worried. "You're just a big meanie, Grogar! It's time somepony taught you a lesson!" She declared whilst sticking out her tongue.

"Insolent child!" Grogar bellowed! "Your disrespect and defiance will cost you dearly! Once I destroy you, all will bow before me!"

"And what happened then?" The dramatic voice seemed to ask as the story seemed to pause right where it was. "Well, in Equestria they say: Little Sun Bun had a very big idea that day."

That is exactly what was happening to the unicorn filly, as she by chance noticed something sticking out of the sack and poking its way up through one of the wrapped presents. She pulled it out and examined it with her magic, smiling as she realized what it was. It was almost like a cannon, except instead of heavy metal balls it was clearly intended to shoot off rockets, like the kind of rockets that were used to launch fireworks into the night sky. Holding aloft the weapon with her horn, she pointed it towards Grogar. "Hey, Grogar! I've got a present for you!" She roared in defiance!

Suddenly, the fearsome, evil ram froze right in his tracks! He took one look at the weapon and immediately became filled with dread. "N-no, wait!" He desperately tried to plead. "I... I was wrong. I see that now. I just... just..." He began to trail off, appearing to get lost in thought.

"Too late, Grogar!" Sunset replied as she took aim with the launcher, pressed a button with one of her hooves, and shot off a single rocket. The rocket whizzed through the air, making a great deal of noise in the process.

Yet to the surprise of Grogar, the rocket flew right past him without so much as grazing a single fur on his body. "Ha, you missed!" He wickedly laughed, now confident of his victory.

The little unicorn filly only flashed a knowing smirk as she simply replied. "Wasn't aiming for you."

The evil ram was silent and puzzled for a moment, before a terrifying realization hit him square in the muzzle! "No... you didn't..."

"... I did!" Sunset grinned. And it was the last thing she said before the rocket reached its intended destination. With a bang, it impacted a large plume of snow that had piled up on the mountaintop. The explosion disturbed the delicate balance, causing the whole snowbank to tumble downhill! Sunset didn't stick around to wait for it to catch her, she just started up the motorized vehicle again and sped away as quickly as she could.

Grogar, for his part, could only scream in horror as the avalanche overtook him and buried him completely! "Nooooooooo!" He bellowed, up until the snow covered him and cut him off. All that managed to poke its way up was his bell.

"Hey, nice bell you got there, Grogar!" An unfamiliar, heroic voice called out from above. "Hope you don't mind if I hold onto it for you. You won't be needing it where you're going." A pegasus pony then swooped down, snatched up the bell, and flew away towards the highest peak she knew of.

"And so, Gusty the Great took Grogar's bell to the peak of Mount Everhoof," The dramatic voice narrated. "Ensuring it would never see the light of day again. And without his bell, Grogar was weakened, no longer able to terrorize the innocent ponies of Equestria. Just like that, the holiday of Hearth's Warming was saved, all thanks to Sunset Shimmer. And she returned to the village with a hero's welcome, and a hero's feast."

As the page turned for one last time, Sunset (along with Twilight and Smarty Pants) found herself practically bathed in the village's adoration and admiration. "Hip hip hooray!" They chanted over and over again, praising the hero who had brought back their presents and defeated an evil none of them could've ever hoped to have even faced.

"And they lived happily ever after." The voice declared, bringing the story to an end.

Upon hearing those words, Twilight knew what she had to do. She waited until the villagers had finished celebrating Sunset Shimmer's victory over Grogar (complete with a feast of the most delicious foods one could imagine), then turned to the little filly and asked her. "Hey, Sun Bun?"

Giggling and licking her lips, Sunset replied with an innocent tone of voice. "Yes, Twily?"

The alicorn princess cleared her throat and made the proposal. "Why don't you come back with me? There's somepony who'd really like to see you. Somepony very important."

The little unicorn filly didn't hesitate to agree! "I bet they wanna shower me with praise too for what I did! I'll go anywhere you go, Twily. I'm ready."

Satisfied with the response, Twilight waited as she then felt a tingling sensation that signaled that Hayscartes' Method was being used to bring her, Smarty Pants, and this book's version of Sunset Shimmer out of the book.

After another puff of magic smoke, Twilight found herself back to her normal size and still in diapers. Her diaper was now a bit stained with damp patches, yet she wasn't worried. Smarty Pants was safely with her.

And there was Sunset Shimmer herself, regressed in stature and appearance to how she had appeared in the book. All that was changed was that she was now wearing a diaper as well, and was currently sitting in a bouncer whose colors perfectly matched her mane and tail colors. She was now excitedly babbling on and on as Princess Celestia stood by her, looking on with fondness and amusement.

"Oh, is that so? You had quite an adventure, didn't you?" Celestia cooed as she used one of her wings to tickle her new charge under the chin. "Yes you did. Yes you did."

Sunset giggled, kicking about. "S-top it, Mommy!" She tried to protest. "I did such a good job showing that poopy head Grogar who's boss!"

"Oh, he was a real meanie, wasn't he?" The sun princess retorted with a cheeky grin. "And to think, you defeated him all by yourself," She paused to wipe away a lone tear. "Oh, Sunset. You're growing up so fast. It seems like only yesterday you came into my life. And now look at you, you're getting big enough and brave enough to take on the world."

"Mommy, don't call me Sunset, call me Sun Bun!" The now diaper wearing filly pointed out. "And I'll always be here for you, no matter how big I get. I promise."

Moondancer, meanwhile, turned to the alicorn mare with a majestic white coat and asked her. "Princess Celestia, is it really okay for you to bring a fictional character into the real world? I don't know if I'm skilled enough to send her back into the book when all's said and done."

But Princess Celestia turned ever so slowly with a knowing wink. "Actually, Moondancer, I must confess to a little secret I had when I was setting all this up," Turning back to Sunset Shimmer, she explained. "This isn't the fictional Sunset from the book. It's Sunset Shimmer herself in pony. We arranged this all the moment I decided she should be Twily's next playmate."

"Really? You did this all for me, Mommy?" Twilight asked.

Celestia nodded. "Yes, and I will tell you more once we've changed your soggy diaper. It seems that even though he was only in a book, Grogar was enough to make you pee-pee yourself."

At that the diapered alicorn blushed bright red with shame and embarrassment as she felt herself be lifted into the air by her fellow princess' magic. "I... I didn't mean to." She insisted.

Sunset Shimmer couldn't resist making a teasing remark. "How is that I have more self control than you do, Twily? I may be back in diapers, but I haven't had an accident in them. I haven't wet the bed since I was three. Ask Sunbeam, she'll tell you. My potty training was smooth sailing all the way through."

"Oh really?" Princess Celestia seemed to playfully retort. "And just who was it, Sun Bun, who had to be re-trained with a proper toilet when she moved in to study with me? Or the one who flushed my crown down the toilet once out of curiosity?"

Sunset wined. "You're still mad about that? I said I was sorry. I only did it once."

The sun princess snickered. "Well, think of this as your long overdue punishment for such a naughty deed," After she had changed Twilight into a fresh diaper, she then trotted over to Sunset and said with a smile. "In all seriousness, though, I'm glad you agreed to come back. And that you agreed to take part in this little secret. I'd held onto that book of yours for so long. But I never imagined you'd want to be part of it."

The diaper wearing unicorn mare sheepishly replied. "Well, what can I say? You were very convincing," Then she asked. "You're sure this will just stay between you, Twilight, and..." She eyed the glasses wearing unicorn and frowned. "Moondancer, was it?"

Moondancer nodded. "Yes, that's me. And don't worry, tomorrow you'll be back to normal and back in that other world, and it'll be like none of this ever happened. But you can just name whatever it is you want as a reward from Princess Celestia."

Sunset Shimmer replied with a smile. "Honestly, just knowing that Princess Celestia isn't mad with me and still loves me after how my studies with her ended, that's enough of a reward for me."

Baby Bright Eyes (Derpy)

Author's Note

Kind of surprised it took the fandom mascot and the most popular background pony this long to win enough votes and become the focus of her own chapter. But hey, better late than never.

Inspiration yet again comes from Scootaboom1, who proposed Derpy flying in on a day with no planned playdate to deliver a love poem, then thinking she shrank into a foal upon seeing Twilight and becoming Twilight's playmate. He also proposed them building a blocktower and eating chocolate pudding with their hooves.

I also took a little bit of inspiration from "Potty Training Tales", but actually Dinky's prompt rather than Derpy's.

Remember that you can vote for more than one character at a time, group pairings are allowed if you think certain characters would work better together rather than apart.

Characters previously voted on:
Chrysalis and Fluttershy - One vote
Sassy Saddles, Fleur De Lis, Party Favor, Flutterbat - One half vote

Baby Bright Eyes (Derpy)

"There we go, all done, Twily," Princess Celestia smiled and cooed as she finished feeding her fellow alicorn breakfast (which had consisted of cut up pancakes topped with syrup, butter, and of course whipped cream). "See how easy it was when you didn't put up a fuss and just let Mommy feed you?"

Twilight happily nodded. "Uh-huh." She then licked her lips, trying to get the last few traces of syrup, butter, and whipped cream off her cheeks.

Celestia just chuckled as she summoned a wet rag with her magic, and used it to clean the padded princess' face with the greatest of ease. "Now Twily, you know you can just ask me. I don't mind cleaning you. It's what Mommy is for."

The diaper wearing alicorn blushed ever so faintly, apparently having forgotten. "Sorry, Mommy," She sincerely apologized. She thus sat there in her chair in the dining room and waited until her face was completely wiped clean before asking. "So, what's next, Mommy? What are we going to do today? And who's my next playmate? Is it somepony I already know, or is it somepony new?"

The sun princess stood up and flashed a smile as she helped Twilight out of her chair. "Actually, Twily, I don't have any playmates planned for today. I went ahead and cleared my schedule so we could spend the day together: Just you and I."

Twilight happily gasped as she thought she knew what that meant! "You're gonna turn yourself into a foal again, Mommy?! Are you gonna be a big sister to me this time?!"

Princess Celestia shook her head from side to side. "No, Twily, I'm not doing that. But I figure it's been a long time since we just spent time together as mommy and foal. Besides," A smile crept across her face. "I decided to let Sunset Shimmer stay an extra day here, mostly because I think Sunbeam would like a chance to see what's become of her precious little filly."

Smarty Pants giggled. "Boy will she be surprised to see Sunset back in diapers."

Celestia giggled back and winked. "Well, that's up to Sunset. She can be as big or as little as she wants to be," Then she turned to her fellow alicorn. "But for now, Twily, let's just focus on you and I," She began to trot out of the dining room. "It's a lovely day outside. Far too nice to spend it entirely indoors, don't you agree?"

Twilight's happy mood immediately faded, replaced by a look of concern and near panic. "But Mommy, if I go outside, everypony will see me and laugh at me! I'll never live the humiliation down!"

The elder alicorn quickly reassured her charge. "Relax, Twily. I'm not taking you out into Canterlot. I would never do that to you, not even as a form of punishment," She quickly explained. "I was just thinking of taking you out into the castle courtyard for a little while, like when you and Coco went hunting for eggs. But this time, you'll have the whole courtyard all to yourself to run around and play in. Rest assured, I've instructed the royal guards to maintain a security perimeter so that nopony unauthorized flies by or teleports in."

That made the padded alicorn breath a sigh of relief and made her give her fellow alicorn a big hug! "Oh thank you, Mommy! You're the best, I mean it!"

The sun princess smiled back, patting Twilight on the forehead as she adopted the best motherly tone imaginable. "Think nothing of it, Twily. I want nothing more than for you to be happy and comfortable while you're like this. Whatever makes you happy makes me happy." She again tried to push that nagging feeling to the back of her mind that reminded her of what Princess Luna had said, about whether it was truly a good idea for the sake of Twilight's mental state to let her get so attached.

With those thoughts still somewhat lingering, Celestia led Twilight towards the doors leading out to the castle courtyard. Before heading outside, she quickly lit up her horn to summon up a diaper bag that she had prepared for just such an occasion. It was considerably larger than most diaper bags, owing to the fact that it needed to fit the alicorn sized diapers and still have room for things like wipes, powder, and of course rash cream. The rather large, hot pink colored bag was then thrown over the sun princess' shoulder. And she then saw fit to ask. "Before we head out, Twily, how's your diaper? Do you need a change?" She promptly pulled back the diaper and sniffed the air.

The padded princess giggled. "Don't be silly, Mommy. I'm nice and clean. You already changed me this morning when I woke up."

"Well, I'm just making sure," The alicorn mare with a majestic white coat cooed, before finding that the diaper was indeed still in pristine condition. "Just remember to let me know if you think you have to go. You've been pretty good about doing that lately."

Twilight nodded back. "Uh-huh, I'll tell you if I have to go potty, Mommy. One of these days, I really want to do a poo-poo in it for you."

Celestia smiled. "I'm sure you will eventually, Twily. You already did it once. But I'll be proud of you even if you never do it again. What matters most is that you try, and that you don't let your bad experience from the first time you tried using it prevent you from ever trying to use it again. It's not something to be scared of. You just need to be careful, and only use it with me or a trusted big pony around." Then, satisfied that everything was under control, she led her diapered charge out into the courtyard as the sun's rays shone down brightly upon the greens within it.

With Smarty Pants now perched delicately on her back, Twilight happily paraded around the courtyard, running here and there without a care in the world! She giggled all the while, occasionally swishing her tail for good measure.

The elder alicorn just smiled as she stood there, a silent observer to Twilight Sparkle's joy and carefree attitude. It reminded her so much of what she'd once thought she would never be able to enjoy: The sensation of being a mother, of having a little one to care for. Surely she was not wrong to want to enjoy this, for however long it might last.

Suddenly, however, the peace and quiet of the beautiful day was disrupted by what sounded like a frantic buzzing sound! Looking up, Twilight and Celestia both just managed to see the outline of what appeared to be a grey coated pegasus mare, right before said mare quite literally came swooping down and crashed onto the greens!

With an eep and a look of horror flashing through her eyes, Twilight jumped and immediately ran behind Princess Celestia for cover! Whether she was frightened by the unexpected arrival, or just worried about being seen in diapers was impossible to tell.

As for the sun princess herself, her concerns were first and foremost directed at the pegasus pony who had just crash landed right before her hooves. She delicately reached out a hoof while asking. "Oh my goodness! Are you alright?"

To the surprise of both alicorns, the grey coated pegasus mare stood up and quickly shook her whole body. She didn't seem to be hurt at all, it was as if the crash landing hadn't even registered. It was now possible to see that the mare had a blonde mane and tail that looked almost like straw. Her cutie mark depicted bubbles. Most noticeable of all, however, was the fact that the pegasus pony's orangish-yellow eyes did not appear to be perfectly aligned. They seemed a fair bit... askew for lack of a better term. Perhaps that explained the pegasus' crash landing?

The wall-eyed pegasus mare, for her part, just locked eyes with Celestia and spoke in a high pitched, bubbly voice. "So sorry, Princess Celestia. I guess I didn't realize how fast I was flying," As she spoke it was possible to notice that she was wearing a reddish-brown outfit that covered most of her coat, and came with a matching hat. "I'm Derpy Hooves from the Ponyville Post Office. I was actually on my way back from dropping off a package here in Canterlot when I overheard somepony reciting a poem. It was a love poem, and it was meant for Princess Twilight."

The sun princess noticed that Derpy had apparently yet to spot or take notice of Twilight. Not wanting to risk exposing the padded alicorn unnecessarily, the sun princess merely replied with surprise. "Oh, you did? Who was it from?"

Derpy shrugged her hooves as she admitted. "I don't actually know. I just heard it being recited by somepony, and then I heard them say it would 'Never do'. They sounded kind of posh, but in a city like Canterlot that could be almost anypony," She promptly dug into her outfit, clumsily pulling out several things as she repeatedly muttered to herself. "Let's see, let's see, I know I put it there somewhere. I wrote down that poem, I'm sure of it!" At last, she managed to pull out a noticeably crumpled and wrinkled sheet of yellow note paper. Squinting as she eyed the hastily scribbled down lines, she cleared her throat and recited as best she could:

Sweet little foal,

How I long to be like you.

Carefree and light throughout the day,

Playing away with nothing to do.

Thinking of you,

It fills my heart with joy.

And makes me wish,

I could again be a boy.

Tucking the paper back into one of her outfit's many coat pockets, she instructed to Princess Celestia. "Would you happen to know where I can find Princess Twilight? I was told she was staying here at the castle, and I thought I saw her while I was flying by earlier. But now I don't see her."

"Oh, Twily... I mean Twilight is around," Celestia quickly corrected herself and coughed into a hoof. "I'll... be sure to tell her about the poem, Derpy. Thank you."

The wall eyed pegasus mare gave a firm salute. "You're welcome, your majesty. Now I'd best be going: A mailmare's job is never done!" Yet as she turned to prepare herself to once more take to the skies, her wandering eye happened to spot the unmistakable form of Twilight as the alicorn was still in hiding behind Princess Celestia. Suspecting nothing, the pegasus pony ran towards Twilight and happily exclaimed! "Oh, there you are, princess!" She quickly pulled out the poem again, this time hoofing it to her. "It's definitely an unusual love poem, but a love poem's a love poem."

Hesitantly and reluctantly, the padded princess accepted the poem. "Oh... uh... thank you, Derpy." She wished more than anything she could conjure up a spell to cover up her diaper, or even just that she was wearing something to hide it.

Derpy just smiled. "It's my pleasure, Princess Twilight. I haven't seen you around Ponyville for weeks now. I guess you've been busy with... whatever Princess Celestia needs your help with," Then she happened to notice what was wrapped around the alicorn princess' rear end: A large, plain white diaper. That made the wall eyed mare gasp! "Oh no! If you're wearing a diaper, then that can only mean one thing!"

"Yes..." Twilight reluctantly began. "I'm a..."

"-You've shrunk down to the size of a foal!" Derpy interrupted! "After all, that must be why Princess Celestia is wearing such a huge diaper bag!" Then a look of horror flashed in her eyes! "Oh no, I must've shrunk down to a foal as well! It must've been because of my crash landing! Oh, why can't I ever go a day without having some kind of mishap or accident on the job?!" She sniffled a tiny bit. "It's not my fault! I don't mean to cause trouble, really. It's just not so easy making deliveries or handling packages when you've got my eyes."

The padded alicorn immediately reached out a hoof to reassure the troubled pegasus pony. "It's okay, Derpy. Mo... er Princess Celestia can take care of you just like she takes care of me. Right, Princess Celestia?"

"O-oh!" Celestia blinked as she realized what her padded charge was suggesting. "Y-yes... I most certainly can, Derpy. After all, Twily doesn't go through that many diapers anymore. I'm sure you can borrow some of them until we can turn you back to normal."

At that the grey coated pegasus pony blushed. "R-really... you're gonna put me back in diapers?"

"Well, you are a foal now," The sun princess pointed out with something of a cheeky grin on her face. "And foals have to have protection in case of accidents. You did just say you're always having accidents on the job."

Derpy's blush deepened, turning her shades a furious shade of pink. "I didn't mean those kinds of accidents. I outgrew the need for diapers long ago. B-besides... I can't stay here! I have to at least send word to the Ponyville post office so they don't think I'm slacking off or got into trouble."

Princess Celestia waved a hoof. "Don't worry about it, Derpy. I can easily take care of that for you. Think of this as a day off. From the sound of it, you could really use one," She quickly gave a whistle, calling for a royal guard. When the guard swooped down, she instructed to him. "Send a message to Spike, and tell him to forward it to the Ponyville post office right away: Derpy Hooves is safe and sound, but has suffered an accident and will not be able to return to work today."

"Understood, your majesty." The guard saluted as he wrote out the message on a scroll and watched as Celestia quickly had it sent off to Spike. A reply scroll came soon afterward informing all that the Ponyville post office had been informed and that Derpy's unexpected day off had been approved.

"See, Derpy?" Twilight pointed out as she trotted over to the now off-duty mailmare. "Princess Celestia has everything under control. Just let her do everything."

The wall eyed pegasus mare breathed a small sigh of relief. "Okay, okay. But this is only until she can turn me back to normal, right?"

"Well, so long as you promise not to tell anypony about any of this," Celestia firmly insisted. "This has to remain between you, I, and Twilight."

Derpy firmly saluted. "No worries, princess. I won't tell a soul, you have my word."

Satisfied with the response, the sun princess smiled and then cooed. "Excellent. And from now on until I say otherwise, Derpy, you can just call me Mommy."

"Okay, Mommy. And you can call me Bright Eyes, that's what my parents used to call me when I was originally a foal," Derpy giggled. "I guess that means you have to put a diaper on me."

"Exactly, Bright Eyes," The alicorn mare with a majestic white coat nodded. "But let's get you and Twily back inside the castle first. I don't think you'll want anypony else to see you in your... current condition." And after lighting up her horn, she carried the wall-eyed mare back into the confines of the castle as Twilight (with Smarty Pants in tow) waddled close behind.

The wall-eyed pegasus pony was soon brought into Twilight's bedroom, and floated onto the changing table as her previously bare bottom was strapped into a diaper that Princess Celestia levitated over from the opened diaper bag.

"Wow!" Derpy exclaimed afterwards as she was floated down. "These diapers are so... so... soft! It's like wearing a fluffy cloud," She giggled, poking and prodding the padding with a hoof. "I don't remember my foalhood diapers being anywhere near as soft and crinkly as this. Or as poofy."

Twilight giggled back. "That's because Mommy makes sure to get only the best diapers possible for me! They're thick and poofy, the best kind!"

The off-duty mailmare replied with something of a frown. "Oh, I wish I'd have known about these diapers. I would've gotten them for my little muffin, Dinky."

At that, Smarty Pants spoke up. "Who's Dinky?"

"Huh? Who said that?" Derpy blinked, looking all around the bedroom.

The padded alicorn sheepishly confessed. "Oh, that was Smarty Pants. Sorry, Bright Eyes, I forgot to tell you about her. She was the first one I ever shared this secret with."

Smarty Pants babbled back. "Yeah. I've been with Twily since she was in diapers as a foal. Heck, if it wasn't for me, she never would've gotten out of them... until she got put back into them."

The wall eyed pegasus mare smiled. "Well, Smarty Pants, allow me to explain. Dinky's my daughter. And she's not in diapers anymore. She's been fully potty trained for at least five years now, which is a good thing considering I didn't even get around to potty training her until after she was four. I know I should've started sooner, but she just looked so cute and carefree in her diapers."

"Hey, it's okay," Smarty Pants reassured Derpy. "Twily didn't even want to start potty training until she was three because of what happened the first time she tried using the big potty. But thanks to my help, she was fully trained by the time she went off to magic preschool. She was only the second pony in her entire class to have that accomplishment."

Twilight beamed. "Yeah, and you helped me see how potty training could be fun, Smarty Pants."

Derpy nodded. "I wanted Dinky to have the same kind of experience. I didn't remember much about my own potty training, but I do remember it was rather difficult. And that was before I had that condition that affected my eyes. I was worried that Dinky might end up the same way and come to hate potty training. But thankfully, I had help from somepony truly special."

"You mean, like Princess Cadence was for Twily?" Smarty Pants questioned.

The pegasus pony shook her head from side to side. "No, she wasn't an alicorn or anything like that. Her name was Nixi, and she apparently came from another dimension. It was like magic: One day, she showed up in my life when I needed her the most, and once everything was under control with Dinky she just disappeared," She frowned, putting a hoof to her chin. "I haven't seen her in so long. Most ponies think I made her up, like how they say I just made up receiving a visit from the stork when I had Dinky. But I don't remember being with anypony when I got pregnant," A blush formed on her cheeks. "Guess that's what I got for going to so many parties and not paying attention. Still, being a mother is an experience I wouldn't have traded for anything in Equestria. Dinky is so adorable, I wish she could stay young forever!"

"I think all mommies and daddies feel the same way," The padded alicorn proclaimed. "I know both my first mommy and the mommy I have now have so many fond memories of me from when I was an actual foal. But nopony can stay young forever."

The wall eyed pegasus pony happily nodded back. "Uh-huh. That's why I savor every moment I possibly can with her," Then she sighed. "Which isn't much, nowadays. My job keeps me so busy, I hardly ever have time to do anything with Dinky anymore. It feels like I'm always asking ponies to watch Dinky for me. I make good money, but every once in a while I wish I could take some time off just to be with Dinky. Pretty soon, I'm sure she's gonna get her cutie mark. And then before I know it, she'll be all grown up."

"Believe me, I know what that feels like," Smarty Pants remarked in a sympathetic tone of voice. "At least you'll get to see her grow up before your own eyes. When Twily outgrew me for the first time, I got stuffed into a chest with a bunch of other toys she no longer played with. I didn't see her again until she decided to use me to create a friendship problem to write to Princess Celestia about. And after that, I had to spend what seemed like forever as Winona's chew toy."

"Smarty Pants, I told you I was sorry! And Big Mac fixed you up afterwards, didn't he?" Twilight only somewhat playfully whined.

The old doll just replied in a grumpy tone of voice. "Yes. Still doesn't mean I enjoyed everything I went through."

"Hey, it's okay," Derpy reassured Smarty Pants. "Everypony makes mistakes. What matters is that you and Twily are back together," Then she turned to the padded princess. "So, how long am I gonna have to stay like this? I mean... I very well can't take care of Dinky if I'm still in diapers. She'd never take me seriously. It was hard enough getting her to listen to me when I wore them the first time when I was trying to teach her how to use the potty."

Twilight put a hoof to her chin, appearing to be deep in thought. "Well... you should be okay by sundown today. That's how long it usually takes when I'm... er... turned into a foal."

The grey coated pegasus mare breathed a much needed sigh of relief. "Oh, thank Celestia! Now this really is just a day off for me," And seconds after she said that, her stomach began to gurgle and rumble quite audibly. "Oh my! Usually, I'm so busy delivering the mail that I never even have time to eat. I just snack on muffins whenever I can make it back to the post office."

Celestia trotted over, speaking in her best motherly tone of voice. "Well, foals can't just eat muffins all day, Bright Eyes. It's not good for them," She then turned to Twilight and said to her fellow alicorn. "Can I trust you to keep Bright Eyes out of trouble until I get back, Twily?"

The padded princess gave a firm salute. "Yes, Mommy. You can count on me."

Satisfied with the response, the sun princess began to light up her horn. "Good. I'll be right back, my little ponies." And she teleported away.

Derpy naturally soon grew bored as she waited for Princess Celestia to come back. So she looked to the padded princess in her presence and asked her. "We should do something together. What do you feel like doing, Twily?"

"Hm, I don't know, actually," Twilight admitted as she looked around the bedroom. By chance, her wandering eyes fell upon a large toy chest. "Let's see if there's anything in the toy chest." And she waddled over to it as Derpy flew towards it.

The inside of the chest was filled to the brim with all sorts of toys. Due to them all having been somewhat enlarged by Princess Celestia, they further fueled the wall eyed pegasus pony's belief that she had shrunken down to the size of an actual foal. "Wow! Seems like everything's bigger now, Twily!"

The diaper wearing alicorn giggled a bit, deciding it best to humor her playmate. "I know, Bright Eyes. Bigger is better!"

The pegasus pony with a lovely grey coat, however, couldn't help but be intimidated a little bit. "Gosh, all these toys are so big. How are we supposed to play with them?" Just then, however, she happened to notice the large set of wooden alphabet blocks, and that gave her an idea. "Hey, I know, we could use these blocks. We could stack them up and build something together. With your magic and my wings, we could probably build something all the way up to the ceiling!"

"I'll help too!" Smarty Pants insisted. "I wanna be part of the fun!"

"Don't worry, Smarty Pants," Twilight reassured her old doll. "You can lay the first block. Then you and I can take turns with Bright Eyes." She proceeded to clumsy pull out several of the large alphabet blocks, sending them all tumbling onto the bedroom floor.

Derpy pulled out a few blocks as well and quickly began wrangling them up. "We can't lose track of these blocks. Mommy or somepony else might step on them by accident and fall down. Then they could hurt, and that wouldn't be fun at all."

"Oh yes, boo boos and owies aren't any fun," Smarty Pants replied. "Luckily, I'm made of cotton, so it's almost impossible to hurt me. I can even sit on Legos and not get hurt."

The pegasus pony chuckled. "You play with Legos too? Dinky loves playing with those, they're her absolute favorite toy! You know how most parents have macaroni sculptures or hoof paintings hung up on the fridge? Well, my little muffin has made some very fine Lego sets that I've kept intact," She paused, wiping a lone tear from her eyes. "Sorry, I'm getting all... oh, what was that big word ponies use?" Unable to think of it, she shrugged her hooves. "Oh well, if it were important I'm sure I'd have memorized it. Whatever it is, that's what I was feeling."

Twilight smiled. "It's okay, Derpy. I've seen Mommy and other big ponies use big words that I don't really understand the meaning of too," Then she turned her attention back to the alphabet blocks. "Now come on, let's start building! Together, we're gonna build the bestest block tower in the history of forever! Mommy will be so proud!"

And that's exactly what the two padded ponies did (with Smarty Pants helping out too, of course). Together, alternating between each other, they stacked the blocks on top of each other. Slowly but surely, a massive tower took shape. It wasn't long before even standing on the tips of their hooves wasn't enough for them. Twilight thus began to use her magic, and Derpy would flap her wings. All the while, the block tower slowly grew higher and higher. Occasionally it would wobble, but not enough to make either diaper wearing pony worry.

At last, there was only one block left, and Derpy had possession of it. Her walled eyes looked up, beholding the truly massive tower she had built with Twilight. It was all but touching the ceiling, there almost didn't seem to be any room at all for any more blocks. Yet if the off duty mailmare squinted just hard enough, she could see that there was a space for the one lone block held in her hooves. So, steadying herself and concentrating deeply, she flapped her wings and began her ascent.

"Be careful, Bright Eyes!" The diaper wearing princess called with concern. She clumsily waddled around the tower and tried to position herself to be able to catch her playmate should she fall unexpectedly.

But the grey coated pegasus mare didn't reply, she was too deep in concentration and had tuned out all distractions. She flew higher and higher, the base of the tower almost becoming just a speck. Yet she could see the top of the tower, it was so tantalizingly close. It didn't matter to her that only she and "Twily" (and Smarty Pants) would be a witness to what had to be a record of some sort. She had to place that last block on top. She just had to. So even as she had to strain herself, she flew even higher. "Wings, don't fail me now!" She proclaimed! Not since her fillyhood days of participating in various flying meets had she been this driven to do something this physically demanding.

Suddenly, there was a faintly audible hiss. Twilight had to blink and rub her eyes to be sure she wasn't seeing things. A huge damp spot was spreading rapidly across the seat of Derpy's diaper! But Derpy didn't seem to notice it at all.

At just that very moment, Princess Celestia finally reappeared in the bedroom. "Alright, my little ponies, lunch is served!" She declared, before laying eyes on the massive block tower and what Derpy was doing!

By chance, the sun princess' declaration had interrupted the wall eyed pegasus pony's concentration for but a second or two. And that brief lapse of concentration was enough for her to lose whatever coordination she might have had. She thus bumped into the block tower with her diaper that was just now starting to feel heavier, knocking away several blocks in the center. The whole tower thus toppled over and collapsed in on itself! And poor Derpy plummeted towards the ground, only to be caught within the golden glow of the alicorn mare's magic seconds before she would've impacted the ground. "Oops, my bad!" She said as her cheeks flushed anew with shame.

"It's alright, Bright Eyes, nopony got hurt. But you really should be more careful and not fly so high, especially not after you've had an accident in your diaper." Celestia lightly scolded in the best motherly tone possible.

The pegasus pony sighed with shame and embarrassment. "Well, I didn't mean to do it. I guess I'm just so used to going to the bathroom mid flight because of my job. Some delivery routes take really long, and I don't always have a chance to stop for a bathroom break. But I wouldn't have been able to use a toilet anyway since I'm just a foal now."

"Even so, we should get you changed before you get a rash," The alicorn mare with a majestic white coat commented, before hearing a hissing sound and seeing Twilight's diaper start to swell up. "And it looks like I'll have to change Twily soon."

"Sorry, Mommy." Twilight sincerely apologized as she too was lifted up by Celestia's magic.

Princess Celestia just cooed and reassured her fellow princess. "It's alright, Twily. It's nothing to be ashamed of. Everypony has accidents." And she quickly carried both her charges over to the changing table.

Once the diaper changes were complete and both Derpy and Twilight were in clean diapers, Princess Celestia fastened bibs around their necks. Then she brought over several jars of different colored goopy substances.

The wall eyed pegasus pony made a face and frowned. "You're not really gonna feed me that, are you, Mommy?"

"I have to make sure you're getting your nutrition, Bright Eyes. After all, you want to grow up big and strong for Dinky, don't you?" The elder alicorn cooed.

Derpy sighed. "Yeah, I guess I do. I can't exactly call myself a good mother if I made a fuss after teaching Dinky not to. Thank goodness she's not here to see me like this."

"Tell you what," Celestia proposed as she unscrewed the lid of the first jar. "If you and Twily cooperate, I'll let you both have some chocolate pudding for dessert."

The off duty mailmare eagerly clapped her hooves and licked her lips! "Oh goody! I love chocolate pudding, almost as much as I love muffins!" She proceeded to open her mouth as wide as possible.

Twilight giggled and kicked about in her pampers, but nevertheless imitated Derpy's motions.

The sun princess was delighted to see that both padded ponies would cooperate for feeding. She proceeded to shove spoonful after spoonful of flavored foal food into their mouths, emptying one jar before moving on to the next. Afterwards, as promised, she quickly teleported to the kitchen and returned with a big bowl of chocolate pudding that was placed between her charges.

Derpy didn't even wait for a spoon, she just stuck her hooves into the chocolate pudding and licked the chocolate off them, giggling in delight as she did so and not caring the slightest for the traces of chocolate she was getting on her face as a result.

Without hesitation, the padded alicorn did the same.

Celestia could only playfully sigh and prepare a wet rag. At least chocolate washed off easily.

Meanwhile, Twilight and Derpy continued to dip their hooves into the bowl and lick the pudding off until they'd both had their fill. Once they felt full, they leaned back and patted their stomachs, belching in unison. Thankfully, neither of them complained when they had their faces wiped clean afterwards, they were too full to care.

This playtime went on for the rest of the day until finally it was sundown, and Twilight was getting ready for bed. At that, Derpy had her diaper removed as Celestia told her in no uncertain terms. "Okay, Derpy, you're back to normal now. You can leave."

The wall eyed pegasus pony breathed a much needed sigh of relief. "Thank you, Princess Celestia. And don't worry, I won't tell anypony about any of this. I mean, not that I think they'd believe me anyway." Then with a giggle and a snort, she flapped her wings and flew away.

Yet Twilight, having just slipped into a set of pajamas, noticed a faint glint in her fellow alicorn's eyes. "What are you thinking, Mommy?"

The sun princess sweetly explained. "I'm thinking that I have the perfect way to reward Derpy for her cooperation. She played her part so well, after all. So I'm going to see if I can't arrange for the Ponyville post office to hire a few more ponies, or at the very least to adjust Derpy's schedule so she can spend time with her precious little muffin."

Little Lulu (Princess Luna)

Author's Note

(WARNING!: Make no mistake this IS a padded pony fic! And as such as it will contain content that some readers will find disturbing! If you are uncomfortable with the idea of ponies in diapers, please click elsewhere and DO NOT, I repeat DO NOT READ!

For those who choose to stay, expect to see the following:
Diapers - Heavy
Ageplay - Heavy
AB/DL Themes - Heavy
Diaper Usage (Wetting) - Medium
Diaper Usage (Messing) - Medium
Implied Diaper Usage (Wetting and Messing) - Light to Medium
Breast Feeding - Medium)

Prince Ecosis announced back in 2018 that Princess Luna was going to be the next character in the original fanfic, and even approached me through PM with suggestions. But that was the last time he (or she) provided any updates on the fic. Using what information I was given, I've decided to continue it, starting with who was confirmed to be next.

The "Sex" tag was in the original, and since I'm including breastfeeding like in the original I decided to keep that tag just as a precaution. There's nothing explicit in this fic, the intention is not for it to be sexualized.

I'll lay down the ground rules for who can be voted on next time, seeing as there's going to be two chapters right out of the gate and I already have decided who will join Twilight next. In the meantime, I hope you'll enjoy Twily and Lulu's playdate. And be sure to check out the original fic if you want to better understand how this contiuation is supposed to work.

Little Lulu (Princess Luna)

"Twily, wake up," Princess Celestia called to the sleeping padded alicorn in that motherly tone of voice. "I have a surprise for you."

Twilight was already surprised to be woken up by the sound of Princess Celestia's voice rather than feeling something brush against her, hearing something, or even smelling something. That had always been the case whenever the sun princess had surprised her in the past. What could the surprise be this time? Was it another unannounced playmate?

Her eyelids slowly fluttering open and Smarty Pants clutched firmly in her hooves (she could never get to sleep without her foalhood doll by her side when she was padded up), Twilight sat up in her bed. Soon, she found herself face to face with an alicorn that was actually smaller than her. The alicorn had a dark, grayish blue coat and a very light blue mane and tail that did not flow. Said alicorn had moderate cyan eyes, and a black patch on their flanks where their cutie mark was: A crescent moon.

Twilight let out a gasp as she gazed upon the alicorn (who was also wearing a diaper)! She remembered seeing this alicorn before, albeit only briefly in this smaller state. "Princess Luna?!" She commented in amazement!

The filly sized alicorn blushed, her diaper crinkling as she tried in vain to block it from view. It took her a moment to find the words she wanted to say. "Indeed... Twilight Sparkle, it is I. My sister has... volunteered me to be your next... 'playmate' as it were."

"Why are you so small?" Smarty Pants asked with a giggle. "Aren't you supposed to be... taller?"

Princess Luna's blush deepened and she seemed to shrink from Twilight's gaze. "Apparently, my sister," She looked to Princess Celestia with what seemed like a glare. "Decided it would be best if I were to be more on your level. As she put it, she felt that 'Twily' would appreciate being a 'big sister' for a change."

Princess Celestia seemed to be struggling not to snicker. "Oh come now, Lulu. You could use a break."

Luna snapped and shouted! "DON'T CALL ME LULU, TIA!" She only realized after the fact that she had used her "Royal Canterlot Voice" to make that statement, as was evidenced by the fact that Twilight was covering her ears (and had covered Smarty Pants' ears for good measure). Turning back to Twilight, she apologized. "Sorry, I didn't mean to be so... loud. I'm just not exactly thrilled with all of this."

"It's okay, I don't think any lesser of you for being in diapers," Twilight replied with a childish giggle. "Besides, I like you more this way. You're more... fun sized."

The night princess' blush returned with a vengeance. "Well, don't get any ideas, Twilight Sparkle. It is only for tonight. Tomorrow, I will be back to my normal alicorn size and I will be out of diapers," Then she vowed. "And for the record, I have no intention of using my diapers as a toilet. I am perfectly capable of using the bathroom."

"Aw, come on, Lulu," Smarty Pants encouraged. "What's wrong with using your diapers? Isn't that what they're for? With them, you can have a bathroom anywhere. And you don't even need to clean up afterward, you can get somepony else to do it for you."

Luna only shook her head from side to side. "Perhaps you and Twilight are okay with using your diapers for number one and number two, but I for one am not. I am still a princess, and a princess does not pee or poo herself. After all, I must set a good example for all my subjects, especially the little ones."

Celestia only replied with a smirk. "Oh, but Lulu, you're not a princess tonight. You are little Lulu, Twily's new playmate."

Just then, a thought struck Twilight and she inquired of Princess Celestia. "But if Luna is here, who's watching over the dream realm? Is it going to be you, Mommy?"

The sun princess smiled even as she shook her head. "I very well can't leave you two foals unattended, even within the castle. What kind of a mommy would I be if I did that?" And she explained. "I temporarily granted Cadence the power to enter the dream realm, and Luna left her a detailed list of what to do and what not to do. I'm sure my niece can manage by herself for one night."

"Oh, that's good," Twilight breathed a sigh of relief. "Now I know I'll have somepony watching over me even while I sleep, making sure I don't have nightmares."

Celestia nodded. "Indeed," Then she approached Twilight and pressed a hoof to her fellow alicorn's diaper. "Now, we'd better get you changed. You haven't even noticed that you've already soaked yourself in your sleep."

"Huh?" Twilight blinked as she felt her diaper compress and crinkle, admitting a familiar squishing sensation as it did. Now it was her turn to blush. "Lulu!" She exclaimed in a childish tone of voice as she eyed the shrunken night princess. "Why didn't you tell me I'd pee-peed myself?"

"You mean, you hadn't already noticed?" Luna blinked in surprise. "I thought for sure you knew. Your diaper was so wet, I could see the damp patches from a mile away."

Princess Celestia simply lifted Twilight up using her magic. "It's alright, Twily. That's why Mommy's here. I'll get you changed so you don't get a diaper rash. We wouldn't want your night with little Lulu to be spoiled," And to her sister she then instructed. "Now Lulu, you remain here. And remember, if you need anything, you just have to ask me."

Luna pouted and folded her hooves across her chest as she sat down on her diaper. "Whatever."

Twilight giggled as she was then carried across the bedroom to a secluded area, that way Princess Celestia could change her diaper in private.

By now, the art of diaper changing was very much second nature to Celestia. Quick as a flash, she had pulled Twilight's soggy old diaper out from underneath her, wiped her now bare bottomed student's flanks clean, strapped her up into a fresh diaper, and then sprinkled in a generous helping of foal powder. Then she lifted Twilight into the air while disposing of the old diaper in the trash, before setting the padded alicorn back down.

"Thank you, Mommy!" Twilight happily hugged the sun princess, delighting in the warm feeling and hearing her fellow alicorn's heartbeat. She didn't even appear concerned that she had supposedly wet herself without knowing or realizing it.

Princess Celestia couldn't help but find that odd. "Twilight's always been aware of whenever she goes potty in her diapers," She thought to herself. "Did she really not know she'd wet herself in her sleep? Or did she know and she was just pretending not to notice?" Quickly, she shook her head to dispel such thoughts. She was probably way overthinking it, it was probably just a sign of how well Twilight was adapting to her role. Foals didn't always know when they'd wet or messed themselves, and it seemed that Twilight had chosen to emulate such a mentality.

Twilight, for her part, just happily waddled away as her spotless diaper swished and crinkled with every step she took. She didn't have a care in the world, she was just happy to be clean and fresh again.

The two alicorns soon returned to where the small in stature Princess Luna was, still sitting in that pouting posture as she hadn't moved an inch. Next to her sat Smarty Pants, the old doll hadn't budged an inch from where Twilight had left it.

"Took you long enough." Luna frowned with impatience.

"Now Lulu," Celestia motherly scolded her shrunken sister. "You must have patience. Mommy had to make sure Twily was all nice and clean so she wouldn't get a rash."

"Besides," Twilight happily pointed out as she trotted over to Smarty Pants. "You could've talked to Smarty Pants, she's a great listener. You can tell her anything."

Princess Luna saw fit to ask. "You really have an attachment for that doll, don't you? My sister told me about that little 'incident' you had with it a few years back."

With a raging blush on her cheeks, Twilight picked up Smarty Pants and hugged the doll tightly. "I didn't mean for things to get so out of hoof, really. It was just supposed to be a harmless little spell."

"Yeah, except for when it made everypony in town fight over me!" Smarty Pants grumbled. "And then I had to spend months as a chew toy for Winona before you convinced Big Mac to let you have me again. You're lucky he knew how to fix me."

Twilight whimpered. "Smarty Pants, we've been over this. I already apologized."

Luna then apologized. "I'm sorry, Twilight. I didn't know your bond with the doll was so strong."

Twilight giggled as she corrected. "You're supposed to call me Twily, just like you have to call Mommy Mommy. That's how this works."

Smarty Pants chimed in. "Yeah! It's like being in a play. You gotta get into character and play your role."

The night princess frowned anew even as she reluctantly relented. "Fine then 'Twily', I suppose I'll let you decide what we do tonight."

"Wait, it's night time?!" Twilight gasped as she rushed to the nearest window to confirm her suspicion! Sure enough, when she gazed out of the window she could see the moon had already risen and the stars were lighting up the sky.

"Surprise!" Celestia declared. "Since my sister is usually asleep during the day and active during the night, I figured it would be nice to have a playdate at night for a change. You and Luna can spend the night together."

Twilight began bouncing up and down in excitement! "You mean, we can stay up past bedtime?!"

The sun princess gently nodded. "Just for tonight, my little ponies. And you can't stay up all night long. If I let you do that, you'd both be cranky in the morning. And nopony likes a cranky foal."

"I would be fine!" Luna insisted as she puffed out her chest. "Just give me a good cup of coffee and I'd manage."

Twilight gasped as her eyes seemed to go wide! "Lulu, Mommy says that coffee's bad for foals. It's like eating too much sugar. We're not allowed to have it."

"But I'm not..." Luna began, only to see the disapproving glare from her sister and relented. "Fine, I guess maybe I could be without coffee for one day," And then she turned to Twilight. "So, what should we do first tonight? The night is still young."

"Ooh! Ooh! I know!" Twilight happily exclaimed! "We could play board games together! And Mommy and Smarty Pants could play too!"

"What a great idea, Twily," Princess Celestia agreed as she used her magic to float over several different board games in brightly colored boxes. "Luckily, I made sure to plan ahead and get all the best boardgames I could find," She set them all down on the floor in front of the padded alicorns. "Go ahead, pick whichever one you like. Just be sure to leave the setting up to me. That's what grownups are for."

In no time at all, a board game was chosen from the collection and set up. It was a really simple board game, you placed your pieces on the board and your opponent did the same with their board. Then you took turns calling out spots on the board, with the goal being to find all of your opponent's pieces before they found all of yours.

Twilight happily sat on her padded flank, Smarty Pants close at hoof. Together, they discussed where the best hiding places for their pieces were, and where they should try to look in the hopes of finding Luna's pieces.

Luna, for her part, just impatiently set her pieces on the board with little to no thought given as to where they should go. "Are you ready to begin, Twily?" She called, trying her best to throw her voice to sound more... childish for lack of a better term.

Twilight was too absorbed with talking to Smarty Pants to pay any attention to Luna's comment. "You're right, Smarty Pants," She said with a grin. "That is a good hiding place. Lulu will never think of looking there."

"Well, I can't help it if I'm good at the game," Smarty Pants boasted. "Whenever we played together, I'd never lose a game unless I lost on purpose. But you're smart too, Twily. I've seen the clever hiding places you used when you used to play this game with your family."

Luna called again, "Twily, are you ready to begin? I don't have all night to wait, you know."

"Just a moment, Lulu," Twilight replied to her fellow alicorn, and after a moment of hesitation and deliberation, she set her final piece down on the board. "Okay, ready!"

The shrunken down night princess sighed in relief. "So am I!" And she insisted. "I'll go first," Clearing her throat, she scanned the top of her board and made the suggestion. "Uh... Cloud Nine."

With a cheeky grin on her face, Twilight said in response. "Nope, you missed. Now it's my turn." But it seemed like it took her a very long time to decide what to do. In a sense, she seemed almost... distracted for lack of a better term: Distracted talking to Smarty Pants, distracted looking at her own pieces, even distracted poking at her diaper with a hoof.

It was only when Smarty Pants called out "Uh, Twily?" that the padded alicorn seemed to realize she was holding up the game.

"Oh, sorry," Twilight sincerely apologized and cleared her throat. "Sky Seven."

Luna looked at her board, and after doing so a small frown formed on her face as she declared. "You zapped my weatherpony. You get to go again."

"Okay," Twilight happily replied and without hesitation she asked. "How about Air Ten?"

"You found my seagull. Go again." Luna replied even as her frown deepened.

Happily clapping her hooves, Twilight proclaimed! "Oh, this is easy! Smarty Pants was right!" And she issued another call: In short order she found all of Princess Luna's remaining pieces. The night princess had been defeated after only taking a single turn, and she hadn't been able to find any of Twilight's pieces.

Luna's luck didn't improve for any of the other board games she and Twilight played: They played one where you had to be the first to get your piece to the end of a board with colored tiles, one where you moved your pieces around the outside of a board to try to make it to "home", and even one where you had to solve a mystery by using clues given to you (and keeping track of clues shown to you by others). No matter what the game was, however, the night princess couldn't win. At best, she might get close, be a few turns away from winning. But a victory eluded her in all the games.

So it was that Princess Luna eventually proposed. "Can we do something else, Twily?"

"Like what?" Twilight asked after the fifth boardgame of the night was finished.

The shrunken down alicorn then suggested. "Well, why not watch a movie? We could even camp out together, set up a tent."

Princess Celestia smiled. "I think that's a wonderful idea! Luckily, I know of the perfect movie for the two of you! It's not scary, so I don't have to worry about it giving you nightmares."

A short time later, Twilight and Luna had managed to hastily erect a small tent made out of pillows and blankets. Alongside Smarty Pants, they nuzzled together inside of the tent as their diapers crinkled in unison.

Princess Celestia got a projector and a screen to project the images onto it. For snacks, she set a huge bowl full of applesauce down on the floor in front of the two padded alicorns.

Soon, the projector had a film reel placed into it. And as the lights were dimmed, a picture began to be displayed on the screen, accompanied by sound.

As it turned out, the movie was an old Power Ponies film from way back when. In fact, it was so old that it was mostly in black and white. The characters spoke very little, for the most part the music and visuals told the story.

Still, a movie was a movie. And Twilight and Luna watched every scene as it unfolded, occasionally dipping their hooves into the applesauce and licking said applesauce off their hooves.

Yet, try as the padded alicorns might to stay engaged, the time was catching up with them as the movie went on. It was hard for them to stay awake as their eyelids began to droop. However, they were able to fight off the urge to sleep long enough for the movie to end. An announcer declared: "And so, once again the day is saved, thanks to: The Power Ponies!" There was a flash of color as the Power Ponies' logo was displayed on the screen, and then the screen faded to black as the credits began to roll.

Princess Celestia turned off the projector a moment later, removing the film reel and putting the screen away. "Well, this has been a very enjoyable sleepover," She declared in a motherly tone of voice, before clapping her hooves. "But now it's time for all good little ponies to go to bed."

"Aw, but Mommy," Twilight playfully pouted even as she let out a yawn. "We're not tired. Lulu and I wanna stay up even later."

"Yes, what Twily said." Luna found herself agreeing.

Celestia chuckled as she effortlessly picked up the two alicorns with her magic (and picked up Smarty Pants too for good measure). "So, you're not sleepy yet? Well, I think I know what will fix that." She carefully deposited the two onto the bed that Twilight had been using since coming to Canterlot. Then, she sat down next to them and lifted up her wings to expose her underbelly.

Immediately, Luna's eyes widened in disbelief! "Sister! You're not actually going to...!"

"Growing foals need their nutrition," The sun princess insisted as she watched Twilight slowly scoot over to her, the padded alicorn wrapping her mouth around a teet as she began to suckle. "Go ahead, don't be shy."

"No thanks!" Luna protested with a gag face. "You are not our mother! I do not need breast milk! If you wish to breastfeed Twilight, that's one thing. But you won't do it with me."

Princess Celestia frowned, but reluctantly decided it best not to press the issue. "Oh well, more for Twily, I guess," And then she looked down to her charge and whispered. "Don't drink too fast now, Twily."

Twilight simply concentrated on timing her suckles to the rhythm of Celestia's heartbeat as she closed her eyes. The rich, creamy taste felt so refreshing to her parched throat. She almost didn't want to stop at all, yet she eventually felt herself be nudged away by a hoof from her fellow alicorn.

Celestia proceeded to pat Twilight's back, and Twilight responded by letting out a hearty belch. Luna watched the whole thing in amazement, surprised at just how much Twilight seemed to be immersing herself in the role of being a foal. It was like she truly believed Princess Celestia was her mother. Was it all just an act?

Well, the night princess didn't have a chance to dwell on the thoughts for long as she felt herself growing sleepier by the second. Yet as she began to close her eyes, she could see her sister getting off the bed and preparing to exit the room. The last thing she heard was. "Sleep tight, my little ponies." And then Luna drifted off to sleep.

Sometime later, amidst the darkness of the night, Princess Luna stirred awake. Something was not right, and she knew it. It took her a moment or so to place the source of her distress: It was a faint but familiar urge in her bladder. Come to think of it, it had been quite a while since the alicorn remembered having gone to the bathroom. She hadn't already focused on not going in her diaper, but it seemed her body had more or less cooperated up to this point. Yet if she didn't do something soon, she was certain that would change.

That meant there was only one thing to do. The princess of the night rose from bed and planted her hooves firmly on the floor. As her eyes adjusted to the darkness, she focused her attention on a door at the other end of the room. She knew from experience that it led to the bathroom. And what luck, the door was open ajar.

As Luna proceeded to use her magic to take off her diaper and set it carefully on the floor, she was startled ever so faintly when she heard Twilight stumble awake. "Lulu? What are you doing?"

"I'm just going to the bathroom, Twily," Luna whispered in reply. "Go back to sleep."

"But Lulu," Twilight protested in a whisper. "You can just go potty in your diaper. Mommy will change you."

The moon princess would not be persuaded for a second. "No, Twilight," She said quite firmly, using the proper name to signal her defiance. "It is as I told you before: I can use the bathroom just fine. I do not require any assistance. Just because my sister has regressed me in size does not mean I must act the way she wants me to act." And she began to trot off, quite unconcerned.

Twilight got out of bed and followed the shrunken alicorn, pleading with her. "Lulu, please! Just put your diaper back on and go potty in it like all good foals do! You don't wanna get into trouble, do you?"

"I will not get into any trouble, Twilight," Princess Luna sought to reassure her fellow alicorn. "Don't try to stop me. I'm going to use the bathroom like a proper princess. Princesses do not piddle their pampers." Slowly but surely, she was advancing along the floor and towards the bathroom door. She was quite determined to go through with her little rebellion.

Nervously, Twilight continued to follow Luna all the while she whimpered with fright. "Lulu, you can't go in there!"

Without looking back to Twilight, the shrunken alicorn asked. "And whyever not, Twilight? You may be fine using your diapers for a bathroom, but I am not. Now please leave me alone!"

"But... but..." Twilight stammered, trying to think of a good counter argument. She finally seemed to settle on. "What about the potty monster? You know it eats foals! It might eat you!"

Luna rolled her eyes, unamused by the childish behavior from Twilight. "Twilight Sparkle!" She sternly scolded and snorted. "There is no such thing as a potty monster! You know that! You're not two! The potty is nothing to be scared of. I will use it, and you will see that it is perfectly sized for a pony my size, let alone a full grown pony like yourself." And with that, she strolled into the bathroom, brimming with confidence in her desire to use the almighty porcelain throne.

Once inside the bathroom, Princess Luna used her magic to flick on the lights, quickly spotting the toilet as it rested not far from the bathroom sink and its accompanying mirror. She paused briefly when she eyed it, seeing that it was now actually a bit larger to her due to her shrunken stature. Getting onto the seat would be a bit of a challenge. But that wasn't going to stop her. She hadn't come all this way just to turn back now.

Twilight entered the bathroom just in time to hear a loud slam as she saw the lid of the toilet be thrown back against the top of the tank! "Lulu, be careful!" She cried as she watched the princess of the night make her approach to the fearsome porcelain beast! "Oh, I wish Mommy was here!" She whimpered.

The moon princess, for her part, just took a deep breath. It was kind of hard to concentrate now that the urge in her bladder had started to grow! The close proximity of her body to the toilet was clearly adversely impacting her ability to "hold it in" as it were. It took all the will power she had not to start peeing on the tiled floor. She proceeded to back up, before running towards the toilet as fast as she could! When she got close to the lip of the bowl, she jumped and extended her hooves outward to try to grasp the seat!

By some miracle, the shrunken in stature alicorn managed to grasp the edge of the toilet seat and hoist herself onto it. Then she wiggled about, trying to get into the proper position. It was a task made difficult by the slippery feeling of the seat, and its cold sensation on her hooves! As a result, she ended up slipping. As she did so, one of her hooves happened to reach the silver handle off to one side.

There was a click as the handle was forced down. And then suddenly, there came a great roar! The noise was awful!

Luna looked down and gasped, seeing the waters within the toilet bowl swirl and surge ominously! The flush cycle had started! And there was worse to come for her, as her body lost its balance. The princess fell off the seat, falling into the toilet with a loud splash! Soon, she was swept up by the spinning whirlpool, thrown one way and then another as she struggled to keep her head above the water!

"What's going on in here?!" The stern voice of Princess Celestia demanded, as the sun princess came trotting into the bathroom at that very moment. From the look on her face, it was clear she was anything but pleased.

"SISTER, HELP! I CAN'T SWIM!" The frightened voice of Princess Luna shouted at the top of her lungs in her "Royal Canterlot Voice"!

"Mommy, help! The potty monster's trying to eat Lulu!" Twilight whimpered and shuddered with fright, too terrified to move!

Immediately, Princess Celestia dashed to the toilet and used her magic to pull Luna free from the bowl! Just in time too, as the waters retreated down the drain and the flush cycle ended. Then, carefully, the sun princess set her soggy sister down on the tiled floor.

"Oh, thank goodness you're okay!" Twilight happily exclaimed! "I thought for sure you were a goner, Lulu."

Luna protested. "I was never in danger, Twilight. I couldn't have gone down the drain."

"No, but you most certainly could've drowned!" Celestia sternly scolded her shrunken sister. "What in the wide world of Equestria were you thinking, Luna?! Why did you take off your diaper and try to go potty like a big pony?! Why didn't you just come to me for help?! Now look at you, you're soaking wet and covered in toilet water. I'm going to have to give you a bath."

The night princess looked at the ground in shame. "My apologies, sister," She replied in a mournful tone of voice. "I thought I could manage all by myself. Clearly, I didn't take into account the fact that I am much smaller now. And therefore, using the bathroom would be a bit of a challenge," Then she noticed something, her urge to pee had disappeared. Looking down at herself, she almost gasped when she saw a small puddle appear underneath her. "Oh dear. Sister, I am so sorry! I haven't done that in ages!"

"All of this could've been avoided, Luna," Princess Celestia pointed out as she used her magic to summon up some sponges and a bucket of water. "Your diaper was a perfectly acceptable alternative to the bathroom, and I wouldn't have been bothered having to change you. It's not like I didn't already do that when you were younger, or when you were getting used to toilets after coming back from the moon."

Princess Luna unhappily sighed. "I guess some of my old immaturity came back to me alongside this physical regression. I am usually not this... rebellious. I just didn't feel like I needed to act like a complete foal."

The sun princess sighed back. "I suppose it's partially my fault too, Luna, for springing this onto you without asking you how you felt about it. Even so, if you were unhappy, you could've just told me."

"But would you have listened?! You got so swept up in your role." Luna protested.

"Guilty as charged," Celestia admitted. "Though, was being a foal again really all bad? Wasn't it nice to have some time off from your responsibilities?"

The shrunken down moon princess found herself reluctantly agreeing as she watched her "accident" be cleaned up. "I guess maybe that wasn't so bad. But I'm not sure if I was really the best choice for Twilight when she is like this."

Twilight then hesitantly spoke up. "Um, Mommy?" She looked at Princess Celestia with a blush.

Princess Celestia was about to ask what the problem was, when a familiar odd reached her nostrils. "Twily!" She exclaimed! Her tone of voice making it hard to tell whether she was truly surprised or just pretending to!

Twilight whimpered and stepped back. "S-sorry. I just got really scared when Lulu fell into the potty, and... well..."

Celestia quickly recovered, cooing at the padded alicorn. "It's okay, Twily. It's nothing to be ashamed of. This isn't the first time you've had a messy diaper in my presence, and it won't be the last," Then she declared. "I guess I'll be giving you a bath as well. Once I take care of your dirty diaper, anyway."

A short time later, Twilight was changed out of her dirty diaper. And then, soon afterward, she and Princess Luna were deposited into a bathtub filled with warm water and bubbles.

Princess Celestia worked quickly but gently to get her charges scrubbed clean from top to bottom, and smelling nice again. Then, after taking them out of the tub and drying them off, she put new diapers on both of them while pulling the plug out of the bathtub to drain everything away.

Twilight and Princess Luna were then returned to bed, and this time Princess Celestia adopted to lay down next to them so as to ensure they wouldn't be able to wake up and get into trouble without also alerting her to whatever it was they were doing. But this time, there were no disturbances. The three alicorns slept soundly through the night.

When Princess Luna woke up the next morning, she was quite relieved to be back to her normal sized body with a dark blue coat, and a flowing mane and tail consisting of sapphire blue and persian blue locks. She blushed as she noticed the diaper still wrapped around her flanks, which apparently hadn't fallen off even though it was now clearly much too small for her. Well, that was quickly rectified when she used her magic: Not to remove the diaper but to more or less inflate it so that it was sized up to her current body height.

It was a good thing the princess of the night did so, for at that very moment she felt her bladder give off the telltale signs of needing to empty itself. Rather than try to trek to the toilet to take care of the matter, the now fully sized alicorn decided to use her portable toilet instead. She relaxed as a faint hissing sound could be heard, and her padding swelled up as it absorbed her "accident" (for lack of a better term). What had she been so fussy about the night before? Peeing in a diaper wasn't that bad, really. It might even be useful for helping her in her nightly duties, she wouldn't have to leave the dream realm to go to the bathroom.

"Now where could I find diapers in my size without anypony getting suspicious?" Luna thought silently to herself. Perhaps her sister would know? Surely, Twilight's diapers had to come from somewhere.

It was on the subject of Twilight that Luna's thoughts began to change. What she had witnessed last night was still fresh in her memory, and gave her cause for concern.

"Good morning, sister," Princess Celestia cheerfully greeted at that very moment as she got up from the bed, taking great care while doing so to avoid waking up the still sleeping Twilight. Soon, the sun princess' wandering eyes noticed the now comically large and sodden diaper on Luna's flanks. She couldn't stop herself from snickering ever so softly. "Did you open your floodgates again last night, little Lulu?"

"Perhaps I did," Luna vaguely replied. "But I am not little Lulu anymore. I am Luna once again," Though, with a blush she added. "If you want to call me Lulu while you change my diaper, I won't mind it."

"You sure you don't want to do it yourself?" Celestia appeared to sincerely question.

The princess of the night shook her head from side to side and lazily replied. "Nah. It's much easier to make you do it."

The sun princess smiled and giggled. "Now where was this kind of cooperation last night, sister?" Then she used her magic to lift her "little" sister up and carry her away. It was a lot harder to do it now that Luna was back to her full grown self, but somehow Celestia managed.

As Princess Luna was having her flanks wiped clean a short time later, she whispered to Celestia. "Sister, we need to talk."

"About what?" Celestia inquired. With her tone of voice it was hard to tell whether or not she was truly unaware of the conversation that needed to happen, or if she was just feigning ignorance.

Luna took a deep breath, knowing that this conversation was not going to be easy. "It's about Twily... I mean Twilight," She quickly corrected herself. "About what you're doing for her."

Princess Celestia's smile disappeared. "Are you saying I'm wrong to treat her as my child? To baby her and treat her as a foal when she chooses to act as such?"

"Are you sure it's just an act?" Princess Luna questioned with concern. "I fear she may be getting too deeply into the role. She may actually be starting to mentally regress, whether she realizes it or not."

"Oh come now, Luna," The sun princess replied by waving a hoof. "Twily... er Twilight knows that she can stop at any time if she wants to. Besides, I'm probably never going to be a mother any other way. This way, we both get what we want: I get a foal of my own, and Twilight gets a mommy to take care of her. And it lets us both escape our worries."

The moon princess just replied. "Well, it may not be a bad idea to perhaps ease off on the role, just for a while. I fear you may be unintentionally creating a dependency on you that will be difficult for Twilight to break. If it is not stopped, it could have profound negative impacts on her mental state."

Princess Celestia noticeably hesitated when those words reached her ears. She was silent for a moment or so, before she sighed deeply and told her sister. "I'll... I'll think about it, I guess."

Clipper and Crash (Soarin and Rainbow Dash)

Author's Note

First half of the double update for this month. Since none of the votes were for combined chapters (back to back stories in each), they're being worked on separately. And this is the first one to come out. This also means that Rainbow Dash now can only be done with Wonerbolts other than Soarin, or with other members of the mane six/seven (Starlight is ineligiable for consideration under any circumstances).

This time around, it was actually superfun who proposed the idea. He (or she) specifically proposed Rainbow Dash first and Soarin second, and Soarin being mentioned as part of the duo elevated Soarin above the competition. The idea was that Rainbow Dash needed a break from leading the Wonderbolts (in this AU she was made captain much sooner), and wanted Soarin to do it with her with her in the role of big sister and Soarin as the little brother.

Seeing as this is in an AU around Season 5/Season 6, Rainbow Dash's parents aren't necessarily canon to this continuity, but I did still want to elude to them indirectly since I imagine their parenting style might indirectly affect how Rainbow feels about being pampered and treated like a foal again. As for Soarin, I mostly went with the headcanon of his mother being Amy Keating Rogers' OC pony, seeing as Amy said she named Soarin after her son.

I'll update the voting totals once the Sunset Shimmer chapter is also uploaded.

Clipper and Crash (Soarin and Rainbow Dash)

Princess Celestia now held aloft in the glow of her horn something special that she wanted to give Twilight. Something she had specifically asked Rarity to design, and something that she had first started thinking about after seeing Moondancer wear one. It was a lavishly detailed, highly stylized onesie that was a bright hue of baby pink. It featured plenty of room to fit Twilight's diapered rear, and had a zipper pouch in the back to make diaper changes much easier.

Twilight all but jumped up and down in excitement when she saw the aforementioned onesie be presented to her! "Oh thank you, Mommy!" She giddly remarked, leaping up and nuzzling the sun princess in the chest the same way an actual foal might hug its mother.

Celestia smiled, returning the display of affection full force, even draping a wing over her fellow alicorn in the process. "You're quite welcome, Twily. It was my pleasure. It was the least I could do after how well behaved you've been recently. Plus, now you'll have a way to keep your secret safe from prying eyes," She carefully floated the onesie into Twilight's hooves and clapped her hooves while cooing. "Go ahead, try it on. I need to know whether it needs to be sent back for some..." She coughed into one of her hooves. "Adjustments."

The padded princess didn't hesitate to slip the aforementioned pink garment over her padded posture, delighting in how it seemed to make her rear sink even further into the crinkly undergarment hugging her bottom, and how it seemed to push her legs apart even more and make her waddle about the way an actual foal would do. She giggled as she gave her now covered padded plot a shake, and then patted the seat with a hoof. "It's perfect, Mommy! I'll do my best to keep it from getting dirty." She said as she gave something of a cute salute.

The sun princess smiled. The affection from Twilight felt only slightly exaggerated, and that absolutely warmed her heart. She knew it was probably not what Luna might want, to get even more attached to Twilight in this role, but Celestia just couldn't help herself. When Twilight was all padded up like this, she was just too cute. Who in their right mind could refuse or say no to her without a great deal of effort?

Princess Celestia, however, then opted to use her magic to carefully remove the new onesie and set it aside. "Well, I'll need to wash it first so it's nice and clean for you, Twily," And she was quick to warn. "It can still be taken away if you act up, so please remember that."

Twilight nodded. "Uh-huh, I'll be good, Mommy."

The elder alicorn smiled back, satisfied that Twilight would sincerely keep her word. And that allowed her to turn her thoughts to other matters of importance: Namely, who would be the next playmate for the padded princess in her care. By chance she turned and gazed out of the bedroom window, looking to the skies above.

The diaper wearing princess slowly waddled over (even though she had no real need to do so). "Is everything okay, Mommy?" She asked her fellow alicorn.

Celestia, for her part, kept watching the skies. "Well, there are some ponies I was expecting to see by now. But it seems they either got lost or were delayed in departing," She shrugged her hooves and turned slowly away. "Oh well. I suppose I shouldn't be surprised, they are rather busy right now."

Yet no sooner had the two alicorns turned their gazes away from the windows, then did there come what sounded like thunderous roars, followed by audible screeches, and then thuds! Two pegasus ponies clad in navy blue flight suits and flight goggles had impacted the bedroom window, and were now slowly skidding downwards towards the ground below.

Thinking quickly, Princess Celestia opened the window and used her magic to pull the pair of pegasi inside, before shutting the window again (after making sure nopony had their gaze fixed on said window, they would surely think something was up if they saw her snatching ponies through windows). She quickly checked them over to see if they were hurt, and breathed a sigh of relief when she saw that they both appeared to be dazed but not harmed to any meaningful extent.

"What was the big idea, Crash?!" A goofy, male sounding voice complained as an azure colored hoof then lifted up the flight goggles on one pony to reveal a set of moderate emerald green eyes. "I told you we didn't have to fly so fast!"

A familiar, feminine and somewhat raspy sounding voice retorted. "First of all, Clipper, we had to fly fast because I didn't want us to be late for the princess," Then as a familiar light blue colored hoof lifted up the flight goggles on the other pony and revealed a set of moderate purple eyes. "We were late because of all that paperwork I had to sign. And for the record: I told you not to call me Crash, especially not in public! I'm your captain now, you're supposed to do as I say."

"'Crash'? 'Clipper'?" Twilight blinked in confusion. She knew for sure the identity of one such pony speaking, and was certain she'd heard the other voice somewhere before. But the names were confusing her.

The feminine sounding pegasus pony groaned and sighed, looking across to the goofy, masculine sounding voice. "Great, see what you've started?" She turned to the padded princess and cleared her throat. "Whatever, let's just get these introductions over with. I still can't believe I agreed to this, even if I did need a break." The two pegasus then promptly pulled the navy blue flight suits right off their bodies, allowing the sweaty, smelly spandex to crumple to the floor. Now standing before the two alicorns was a very familiar looking rainbow maned pegasus mare, and a pegasus stallion with an azure coat, a very dark grayish-blue mane and tail in something of a buzz cut, and a cutie mark depicting a lightning bolt going through a cloud.

However, the cutie marks on both pegasi were only faintly visible through the very thick diapers they were wearing, both of which looked like they'd gone through a good soaking given the damp patches on them. Yet neither pegasus seemed to be bothered by the added bulk, or by the damp feeling they were undoubtedly experiencing right now.

Twilight's eyes went wide as she let out a gasp! She'd heard about these two from Spitfire, and had even interacted with one of them before then! She was now face to face with Rainbow Dash and Soarin, both of whom had been wearing diapers underneath their Wonderbolts flight suits, almost as if they'd flown straight over from the academy itself.

Soarin giggled, swishing and shaking his padded posture. "Well, I'd say she's taking it pretty well, huh Crash... I mean Dash."

For a moment or so, the padded princess found herself at a near loss for words. "How... I mean what... I mean..." True, she could already pretty much piece together why the two were here, but she was still surprised to see them all the same, in diapers no less.

Soarin was the first one to answer the princess' puzzled pronouncement. "Come on, Twily. We're here to be your playmates. Your mommy told us already."

Rainbow Dash groaned, putting her hooves to her face. "That's only partially true, Soarin. She'd been begging and pleading with me to come back and play with Twily some more because she had to trick me and regress me against my will last time," She let out a sigh, plopping onto her padded posture whilst ignoring the squishing sensation that came as a result. "I didn't really want to. But then I started thinking about it more: And it was kind of relaxing. Plus, ever since I got promoted to captain of the Wonderbolts, I've had so much on my plate that I could really use some downtime."

Soarin, meanwhile, adopted a goofy grin. "Yet she would only agree to do it if I went along with her. She asked me to do it because I'm still second in command, whereas Spitfire's basically stepped aside and only comes in to fly with the team as needed. I'll give Crash... I mean Dash credit, she's proven to be a much better captain than a lot of the other Wonderbolts were expecting."

"Soarin, how many times are you gonna keep calling me that?!" Rainbow complained in an annoyed tone of voice. "I thought I made it clear when I took over that that was a Wonderbolts tradition we didn't have to keep doing, like what you used to use the 'special academy bathrooms' for when punishing certain cadets."

Soarin quickly whispered to Twilight. "You don't wanna know, it's not pretty," Then he was quick to apologize to his superior. "Sorry, I guess old habits are hard to break. Still, it means a lot that you'd ask me to do this with you. Not that I have a problem with being back in diapers. Don't see why so many of the other 'bolts complain, it beats having to wait in long lines for the bathrooms before and after shows," Poking his padding with a hoof, he said with a smile. "Instead, you just keep on flying and let it all out, and nopony's ever the wiser."

"Until you have to change yourself," The rainbow maned pegasus mare groaned and gagged. "It's really not pleasant. That's why I made Lightning Dust our official team changer: Figured it was the best way to keep her out of trouble until I know I can trust her not to go overboard. It may not be pretty but... well, somepony's got to do it. And for some of the Wonderbolts, hiring a designated changer was the only way they'd agree to stay on the team. It was either that, or I made bathroom breaks mandatory for long flights. I went with what I felt was the lesser of two evils."

The Wonderbolt co-captain just giggled in reply. "Aw come on, Rainbow Dash. You don't have to lie. You could've tossed that diaper rule as soon as you became captain, but you kept it on because you saw as well as Spitfire and I did how diapers could have their uses."

Twilight giggled back in a playful tone of voice. "Oh I know. I mean, using the potty can be great too. But having a potty you can take with you anywhere and not have to worry about it is such a huge relief."

Rainbow simply sighed. "Well, whatever, the whole team's on break now. Spitfire can handle any emergencies that might pop up," She then turned to Soarin. "We both agreed this stays between us, Soarin. I'm the big sister this time, you're the little brother. So what I say goes!"

Princess Celestia came trotting up at that very moment. "Careful now, Rainbow Dash. Don't think I've forgotten how much of a hooful you were the last time you were, playing with Twily. You have to agree to do whatever I say," Her tone of voice briefly took on a more serious undertone as she warned. "And you know what will happen if you act up."

At that, the brash speedster swallowed hard and shrank from the sun princess' gaze with a faintly audible "Eep".

Celestia quickly went back to her gentle, motherly sounding tone of voice as she cooed. "Good, seems we understand each other," She then trotted over to Twilight and inspected her fellow alicorn's diaper. "Now, let's just see if you need a change too, Twily. We wouldn't want anypony here to get a rash before play time has even started."

"Don't worry, Mommy. I'm dry." Twilight insisted as she allowed her diaper to be pulled back and examined quite carefully.

The alicorn mare with a white coat the same pristine white as the diaper smiled upon seeing that her charge was telling the truth. "Well done, Twily!" She showered the diaper wearing princess with exaggerated praise, even playfully patting her head. "Why don't you go keep Smarty Pants company while I take care of your new 'big sister' and 'little brother'?" She proposed as she then trotted over to the two padded pegasus sitting before her.

Twilight nodded and playfully waddled away. "Okay, Mommy. I can do that."

Satisfied that her fellow alicorn would stay out of trouble (and out of sight of prying eyes), the sun princess approached Rainbow Dash and Soarin, quickly taking hold of both of them with the soft, golden glow of her horn. "Alrighty, then. Let's get you changed out of those soggy diapers. Don't worry, Twily has plenty of spares for you two to borrow."

"I just hope they're as absorbent and poofy as the ones we were wearing under our flight suits," Soarin commented. "Thick and poofy diapers are the best!"

"Whatever, it's not like I'm gonna actually use them again. If Soarin hadn't insisted we rush over here, I would've gone to the bathroom before we suited up." Rainbow grumbled. Nevertheless, she didn't make a fuss or try to fight back as she was floated onto the changing table next to Soarin. She and her co-captain were soon stripped of their diapers, which were bailed up and tossed aside without fanfare. Then their rumps were thoroughly wiped and powdered, before two new diapers were floated on and strapped to their bottoms.

"There we go, all nice and clean again," Celestia cooed as she lifted both off-duty Wonderbolts off the changing table and set them gently upon the floor. "Just remember to ask me if you need anything. And be nice to Twily. If you play your parts well, I'd be more than happy to give you both a reward."

Rainbow shrugged her hooves. "Eh, I'm pretty happy as it is. Even being captain is pretty awesome: It's just all the little things that I really don't like bothering with. They seem so unnecessary. I don't know how Spitfire could do it all and make it look so easy."

Soarin waddled over and draped a wing around his teammate. "Hey, don't worry about it, Dash. You'll get the hang of it eventually. Even if the other 'bolts are still getting used to it, I'm glad to have you as a captain. Spitfire made the right choice."

The brash speedster slowly nodded. "Yeah, I guess she did. And it's not like she's gone forever. She's still on hoof to help out. Plus," She put a hoof to her face and couldn't resist letting out a giggle. "She's been getting pampered a lot too from what I hear."

The alicorn mare with a majestic white coat just flashed a knowing wink. "Well, I felt they would both appreciate a chance to feel young again," Then she ushered her charges towards Twilight. "Now then, my little ponies, what do you feel like doing today?"

The rainbow maned pegasus fiddled with her hooves as she sat on her newly powdered and padded posture, deep in thought. She thought, and thought, and thought some more. Just sitting there, tapping a hoof against her chin. But after a while, she stood up and let out a groan. "I've got nothing! I've been so busy just thinking about the diapers and stuff that I haven't had time to think about anything fun to do. Is it any wonder why I decided to do this? I've been so frazzled lately! I just don't do well when I'm all cooped up in some office somewhere, filling out paperwork, signing autographs, and doing all the boring but important stuff I know a captain's supposed to do."

"Sounds a lot like what Mommy does on a day to day basis," Smarty Pants chimed in. "Or what Princess Luna sometimes has to do."

Twilight just grinned and giggled. "Well, that's why she's here now. Dashie needs to take a break from all that no fun grown-up stuff and just have fun, like you and I, Smarty Pants."

Smarty Pants nodded back. "Exactly, Twily. Grown-up stuff is boring, it's not for little ponies like you and I. It's for mommies and daddies and other big ponies to worry about."

Soarin, meanwhile, seemed to be absent mindedly sticking his hoof into his mouth and suckling on it. It was clear that he was more or less trying to "get into character" as it were. And it didn't seem to bother the azure coated stallion that he was starting to drool ever so faintly as he did so. Yet suddenly, he pulled his saliva covered hoof out of his mouth and proclaimed in a childish sounding voice! "I know, we should all go for a fly together! I find that there's nothing more relaxing and stress relieving than going on a long fly somewhere. Plus," He once again patted his padding. "We're already wearing protection."

But Twilight flinched at the suggestion, and so did Rainbow Dash. Their eyes went wide with what seemed like horror!

"Ooh, I don't think that's a very good idea, Soarin," Smarty Pants chimed in with her own sentiments. "Ponies might see you in your diapers. And I don't think Twily would want that."

The pie loving stallion blushed as the realization struck him all of a sudden. "Oh yeah, guess I kind of forgot about that," He started thinking again. "Maybe we could just fly around in this bedroom? We could pretend to do our own little Wonderbolts show."

Celestia shook her head from side to side, voicing her disapproval. "Absolutely not! The ceiling is too low and there's far too many obstacles lying around that you could bump into."

Rainbow protested. "But we can't fly outside, not even if we put on our uniforms. Twily won't have anything to cover up her diaper. If anypony saw it or took pictures, everypony would find out. They'd never take her seriously again."

The padded princess shut her eyes and shuddered, picturing just such an image in her mind. She could already hear the jeers, the taunts, and the cruel laughter from all those stuffy nobles and delegates.

"Twily, it's okay!" Smarty Pants moved to quickly reassure the frightened princess, slowly moving a hoof out. "That will never happen. Mommy will never allow it!"

Twilight opened her eyes, sniffling slightly. "I know... but still..." She trailed off, deciding it best not to dwell on the matter.

Luckily, it was Princess Celestia who came up with the solution. "Well, I believe I know of a place within the castle that should suit all of our needs: It's big enough to have plenty of room for you to all fly around. But it's also secluded, so nopony will come barging in uninvited. We'll have total privacy, and Twily's secret will stay a secret."

"And where would that be?" Rainbow Dash pondered.

The sun princess quickly explained. "I was referring to the royal observatory. It hardly ever sees use anymore, aside when Luna wants to look at the stars more closely. Even then, she only ever uses it at night or in the early morning. The rest of the time, it just sits there unused. I will obviously have to move some of the heavy equipment, but that shouldn't take long," Turning to the three padded ponies in her care, she sweetly inquired of them. "Would that be okay with you, my little ponies?"

All three nodded back, Celestia taking nods as a yes. "Good, it's all settled!" She declared as she brought her hooves together. "But before we worry about that, let's get you all fueled up. I'm sure you all must be hungry by now."

As if on cue, a trio of rumbling stomachs reached the trained ears of the elder alicorn. And so it was that she quickly teleported them all to the royal dining room.

Once in the dining room proper, Celestia quickly fixed bibs around the necks of Twilight, Rainbow Dash, and Soarin. She was especially pleased that Rainbow wasn't trying to fight her, and was being more cooperative about the whole thing in stark contrast to her behavior from last time (Rainbow still having her adult mind certainly helped). "Alright," She said afterwards. "You all stay here. Mommy will be back shortly with the num nums." And then she disappeared into the kitchen.

Soarin, for his part, just leaned back in his chair, letting his rear slowly sink deeper and deeper into his padding. He seemed to be having the time of his life. "You know, this really takes me back." He said in such a casual, unconcerned tone.

"It does, does it?" The currently off-duty captain of the Wonderbolts questioned. She sounded genuinely curious about such a statement if the odd look on her face was any indication.

The azure coated pegasus stallion nodded. "Yup. I'm not ashamed to admit I probably took a little longer to fully get out of diapers than most ponies my age. My dad was almost always away due to work, so Mom mostly stayed home and raised me with love," With a chuckle, he boasted. "I had her practically wrapped around my hoof. There was almost nothing she wouldn't do for me," Then he sweetly smiled, closing her eyes. "But what I remember most about her was her singing. She had the most beautiful voice."

"Like how when I used to sing to Twily?" Smarty Pants asked.

Soarin shrugged his hooves. "Maybe, I guess. She would sing to me every night to help me fall asleep, or when trying to get me to take naps," He fondly recalled. "The only thing that ever came close to topping her singing was her cooking. She could make anything yummy, especially pies," He licked his lips and started to drool. "Oh yes, I LOVED her pies! It's why pies are my favorite food: They remind me of her. And being back in diapers like this," He fondly sighed. "It's like I'm a little foal again, entirely in her care: Safe and secure."

Twilight happily nodded. "That's what any good mommy should do for her babies. My first mommy always told the best bedtime stories, because she used to be a writer and an author. And she always did the funny voices too. Then of course, there's my other mommy," Her tone of voice changed as it became clear who she was referring to. "She's even better. She's always there for me no matter what, she even lets me drink her milkies."

At that Rainbow Dash's eyes went wide with shock! "No way! She does that?!"

"Hey, that's what mothers do for their foals, isn't it?" The Wonderbolt co-captain pointed out.

The brash speedster's cheeks flushed pink as she realized how overly dramatic her outburst had been. "Sorry, that just... caught me off guard, was all. I wasn't really expecting to hear that."

Soarin then saw fit to ask. "What was your mommy like, Rainbow Dash? You did have one, right? And probably a daddy too?"

Rainbow's response took her fellow padded ponies by surprise. She gulped and swallowed hard, suddenly trying to adopt a faraway look. "W-why do we need to talk about that? I... I don't see why we should. I mean, yes, I have parents. But we just have a..." She paused, trying to think of a good word to describe her bond with two ponies she hadn't seen or spoken to in many years. "A-a delicate relationship, that's all. I don't hate them. I just... don't really feel the need to talk about them: You know. We stay in touch more or less."

"Really?" The pie loving stallion pondered. "Then how come I haven't seen them at any of our shows since you became part of the team? Seems like everypony else's parents have been to at least one show."

The rainbow maned pegasus mare swallowed hard once again. "W-well... they're just... really busy with... their interests. I did send them a letter about making the team," She fiddled with her hooves and tried to adopt the most innocent looking expression possible. "I-it must've... gotten lost in the mail... or... or something." It seemed clear that she wasn't telling the whole truth for some reason.

Before either Twilight or Soarin could press Rainbow Dash on her suspicious skirting of the issue, however, the dining room doors were flung open. Princess Celestia came strolling in, carrying several gleaming trays piled high with fresh, steaming vegetables. And the aroma from them wafted through the air, making the mouths of her charges all collectively water at once.

"Alright, everypony," Celestia cooed as she sat down in a seat, Twilight seated off to her left and Rainbow Dash and Soarin off to her right. "I've brought the most high quality vegetables, all cut up just for you. If you're going to be flying through the skies and doing daredevil stunts, you're going to need your nutrition," She then warned. "And none of you are leaving the table until you eat everything on your plates: No ifs, ands, or buts."

Both Twilight and Rainbow seemed satisfied with the offerings (though one was more enthusiastic about it compared to the other appearing to be more or less resigned and reluctant). But Soarin took one look at his plate and frowned, pushing it away. "Can't I have something yummier?" He asked. It was hard to tell if he was just playing, or if he really meant it.

The sun princess shook her head from side to side in disapproval. "I'm afraid not. This is all you're going to get," She eyed the pie loving stallion and warned. "That's not going to be a problem for you, is it?"

The diapered stallion with an azure coat hesitantly replied. "Even when my mom made me eat them as an actual foal, I hated vegetables. I just don't care for how they taste. I'd rather eat almost anything else, really."

The alicorn mare with a majestic white coat then offered. "Well, how about this? If you cooperate and eat all your vegetables without making a fuss, I'll see about asking the chefs to whip up something sweet for you and for your playmates: Deal?"

After hesitating for about a minute or so, Soarin flashed a toothy smile as he said quite eagerly! "Deal!" And just like that, any reluctance on his part completely disappeared as he began to chow down on the vegetables, crumbs flying everywhere in the process.

The rainbow maned pegasus couldn't resist laughing herself silly at such a sight. "I thought he just did that when he eats pies. But apparently, he's always a messy eater!"

"Good thing you're not like him, Twily." Smarty Pants commented.

Twilight and Rainbow Dash then ate their vegetables in much more orderly fashion, though their faces still got a few crumbs here and there by the time they were done.

Rainbow leaned back in her chair afterwards and patted her belly, delighting in how nice and full it felt. "Oh, that hit the spot!" Then, almost as if by instinct, she let out a loud belch. "Excuse me." She managed to force out.

Celestia, for her part, just chuckled while using a wet rag to wipe off the trio of padded ponies' faces. And to Soarin she then said. "A deal is a deal, I'll tell the chefs and see what they can do."

"Can it be a pie?! Preferably an apple pie?! Apple pies are the best!" Soarin firmly insisted as he wiggled around in his seat, shifting his weight as his bottom had by now sunk fully into the rear of his diaper.

The sun princess nodded. "Okay, an apple pie it shall be. In fact, I'll make it three apple pies: One for you, one for your captain, and one for Twily of course."

"But what about you, Mommy?" The padded alicorn asked. "Don't you want an apple pie too?"

Princess Celestia sweetly replied. "Oh no: I'm really more of a cake mare than a pie mare," Then she rose from the dining room table. "I'll just pop in to have a word with the chefs. Then I'll ask you all to remain in the bedroom while I get things set up for your little Wonderbolts show." And she was as good as her word.

Afterwards, time seemed to pass in agonizing slowness as the three padded ponies stayed in the bedroom and waited for Princess Celestia to return.

"Ugh, what is taking her so long?!" The brash speedster mare complained. She even went so far as to put her hooves up to her face as she groaned. "This is so boring sitting around here, waiting."

"It's just like when Mommy makes me sit on the big potty, even when I don't want to." Twilight remarked as she started pacing back and forth.

Soarin didn't seem bothered. "Hey, come on, now. We promised her we'd be good and would wait for her. Let's just find something to do to pass the time until she gets back," He quickly proposed. "I know: Let's play tag! This room's big enough for it!"

Rainbow immediately spoke up! "Great idea, Soarin! And since you proposed it, why don't you be it first?" She then took off, flapping her wings and zipping away! "Can't catch me!" She taunted in the most childish tone of voice imaginable.

The azure coated stallion whined only somewhat playfully. "Hey, no fair!" He quickly flapped his wings and tried to chase after her.

Twilight giggled, patting her padded tush and taunting! "Can't catch me either, slowpoke!" And she ran away too!

"Aw come on, I am not slow!" Soarin complained! Yet he decided to focus his efforts first on trying to catch Rainbow Dash, determined to pay her back.

The currently off-duty Wonderbolt captain delighted in making her co-captain and fellow Wonderbolt chase after her. "Come on, Soarin! You needed the exercise! Otherwise, you'd get all slow and fat!"

"Make another crack about my weight, Dashie!" The co-captain snorted. "See what happens!" He then narrowed his eyes and lunged forward, ultimately succeeding in tackling his "big sister" to the floor. Then he sat down right on top of her, planting his padded posture firmly upon her body. "Now take back everything you just said, or you can forget about getting up."

Rainbow Dash growled and groaned. "Now you're the one not playing fair, Soarin. Get off of me, or I'm gonna make you sorry!"

Soarin playfully taunted. "Nu-uh." And he pressed the full weight of his diaper down further, whilst also leaning down to tickle his fellow padded pegasus with his hooves.

The rainbow maned pegasus mare howled with laughter, kicking and screaming about with tears in her eyes. "S-stop it! Please!" She pleaded in between fits of hysterical laughter, trying in vain to break free. When she saw Twilight off in the distance, she pleaded. "Twily, help me! Soarin's being a poopy head!"

Twilight waddled over, adopting a cheeky grin as she decided that instead of helping her friend she would join Soarin in tormenting and tickle torturing Rainbow for a bit. After all, she still had a little bit of pent up frustration from when the brash speedster had gotten them both into trouble the last time she'd been Twilight's playmate. "Say you're sorry, Dashie!" She demanded.

"Nu-uh, not gonna do it!" Rainbow Dash insisted. As much as it was now hurting her to laugh, she would not give in.

So it was that the tickling and the teasing went on for what felt like a good while. Neither Twilight or Soarin showed any signs that they were going to yield or cease.

Yet suddenly, an ominous sensation made itself known to the rainbow maned pegasus! Almost on instinct, she shot up, pushing Soarin and Twilight off her and sending them both stumbling to the floor! She clutched her stomach with a hoof as she struggled to keep her legs from spreading apart and adopting a squatting posture. "No no no no no!" She said again and again with a strained look on her face.

"What's wrong Dashie... I mean Dash?" Soarin was the first one to ask upon noticing his teammate's troubled expression.

The brash speedster didn't answer with words. She instead made more or less a mad dash across the room until she reached the bathroom door, frantically pawing at it and trying to get it to open! "Come on! Come on!" She whimpered as her face seemed to turn red.

The padded alicorn trotted up to her friend, telling her. "Sorry, Dashie. Mommy locks the bathroom door when she's not around. We're not allowed to go in there without her or another trusted grown-up."

"You gotta be kidding me!" Rainbow complained and moaned. "I really gotta go!"

Soarin tried to reassure his frightened fellow pegasus. "It's okay, Rainbow Dash. Just let it all out. My mom always used to say when she was potty training me that it's not good to hold it in all the time."

Twilight nodded. "Uh-huh. B.B.B.F.F. and Mommy always say the same thing. And you know foals can't use the potty anyways without an adult to supervise them."

Realizing that there was no choice, Rainbow sighed and resigned herself to the inevitable. "F-fine," She forced out. "But I'm not changing myself! That's the one thing I hate most of all about this, even more than what I'm about to do," She spread her hooves out and began to adopt a squatting posture. As she did so, she asked her fellow padded ponies. "Uh... c-could you... look away, please?"

Soarin nodded. "Sure thing, Dash." He quickly turned his head, and noticed Twilight doing the same after making sure Smarty Pants had a hoof thrown across her eyes so that the doll wouldn't be able to see what was about to happen either.

The rainbow maned pegasus felt her tail hike upward as she grunted and began to push! Even with all her time as a Wonderbolt, she had yet to actually do this in her diapers. It took her a long time to go against years of potty training, but finally her efforts were rewarded with the sound of crisp crinkles as she relieved herself: Her body feeling empty afterwards and her diaper feeling nice and full. Within seconds, however, the stench of manure reached her nostrils and made her want to gag. It was so overwhelming and overpowering!

Twilight and Soarin, without saying a word, looked to each other and then did the same thing they'd seen Rainbow just do. Unlike her, they had very little trouble getting their bodies to cooperate. And soon, their diapers were full too.

"You guys didn't have to do that for me, you know." Rainbow pointed out afterwards.

"Hey, when you gotta you gotta go," The azure coated stallion replied as he ran a hoof through his mane. "Don't you feel better now that you've gotten it all out? And wasn't that better than having to run to a toilet?"

The brash speedster sighed deeply. "I... guess so. But still... this is so gross!"

Luckily for the three padded ponies, Princess Celestia reappeared in the bedroom at that very moment. And as soon as she caught a whiff of the air, she knew what had happened. "Oh my goodness!" She exclaimed, dramatically fanning a hoof across her nose as she hastily summoned up a clothespin and put over her nostrils to block out the stench. "It seems I have three very stinky foals to deal with."

Fortunately for all involved, Celestia had the dirty diapers changed in a matter of mere seconds. She even made sure to double bag the trash bin she threw said dirty diapers into. "Perhaps I should look into getting a diaper pail," She thought aloud as she then wiped her charges clean, thoroughly powdered them, and then put new diapers on them and helped them to stand. "Sorry for being gone for so long, my little ponies. There was a lot more stuff that needed to be moved out of the observatory than I thought. I should probably have a talk with Luna about not leaving things just lying around so much."

"So, is everything ready for us now, Mommy?" Twilight asked after the diaper changes were complete.

The sun princess happily nodded. "Indeed it is," She then floated over a special pair of pajamas intended for a full grown pony like Twilight. They were designed to resemble the flight suits worn by the Wonderbolts, but had room in the back to fit the extra weight of a diaper. "And what Wonderbolts flight show would be complete without the uniforms? Now you can look the part just as much as you'll act the part, Twily!"

Twilight giddly jumped up and down, kicking her back legs in excitement! "Oh thank you, thank you, THANK YOU, Mommy!" She hastily snatched up the pjs and somewhat clumsily slipped into them as best she could. She giggled afterwards as she "pretended" to pull down her flight goggles and zip up her suit.

Rainbow Dash and Soarin, meanwhile, went and put their flight suits from their earlier flight to the castle on. "Knew we were forgetting something," Rainbow muttered under her breath. "Maybe we should've had these washed."

"We'll definitely have to take care of that when we get back to the academy," Soarin agreed. "Otherwise, Spitfire's gonna chew us out for sure."

"Okay, everypony, are you ready?" Princess Celestia asked once all three padded ponies had gotten properly suited up.

The three suited up fliers all nodded together. "Yes we are!"

The alicorn mare with a majestic white coat smiled, beaming happily. "Good! Let's get the show underway, shall we?" Then, with a quick flash from her horn, she teleported them all to the now cleared out and vacant royal observatory. The whole place was essentially a wide open dome, with plenty of room for three ponies like Twilight, Rainbow Dash, and Soarin to fly around to their hearts' content.

Rainbow, pretending she had her whistle on her, gave a shout! "Alright, Wonderbolts, follow me! Do exactly what I tell you to do, do I make myself clear?!"

"Ma'am, yes ma'am!" Soarin and Twilight sharply rapped as they fired off a quick salute to their designated leader. Then, flapping their wings, they followed the brash speedster as she flew up all the way towards the roof of the observatory. Then she dove back down, and pulled up again seconds before she would've made contact with the ground!

What followed was a series of rapid dives, climbs, turns, spins, and other impressive aerial tricks that were almost too fast for the naked eye to see!

Princess Celestia watched the whole thing unfold, occasionally clapping, cheering, and adding her own sentiments to break what was otherwise silence.

Occasionally, Soarin or Rainbow Dash would break off to do their own little thing independent of the others. But Twilight never once deviated from the standard routine, imitating whatever she saw her fellow fliers doing.

The grand finale for the impromptu flight show saw Rainbow fly up as high as she could, practically touching the ceiling. Then, gritting her teeth, she pushed herself down as fast as she could! A rainbow colored shockwave soon shot out from behind her, accompanied by a deafening roar! The shockwave itself faded after just a moment or so, lacking any sort of sky to stay in. But the performance was still a sight to behold for the brief amount of time it had been there.

Celestia waited for her charges to slowly fly back down to the ground afterwards, watching as they all lifted up their goggles one by one. "Bravo! Bravo!" She applauded. "What brave little ponies you were. Never have I seen such daredevil displays of dazzling daring do. That was the best Wonderbolts show I've ever seen!"

"Aw, thanks. I'm always happy to delight the fans," Rainbow insisted as she tried her best to be modest. "To be honest, even I'm surprised at how easy it is for me to do a sonic rainboom now. I guess that's just how good I've gotten at pushing past my limits."

"Being on a team like the Wonderbolts'll do that to you," Soarin pointed out. "And it's performances like that prove you'll be just as good a captain for us as Spitfire was, maybe even better."

The brash speedster and off-duty captain just replied. "W-well, don't forget that if it wasn't for your encouragement, Soarin, we wouldn't even be here right now. I never could've worked up the courage to go back to diapers again without knowing I had somepony as trustworthy as you to go through it alongside me," She sighed. "It's funny, now I feel like what I went through with my parents growing up actually wasn't that bad, even if they could go too far sometimes."

"Oh?" Smarty Pants asked (she had been brought to the observatory with Twilight, but had remained a silent observer).

The rainbow maned pegasus began to fiddle with her hooves as she confessed. "Well, like Soarin and Spitfire from what I can piece together, I was an only child growing up. I don't know if my parents just never wanted to have another foal, or if something happened that made them unable to. Whatever it was, they were really affectionate with me. Too affectionate, to the point where it stopped feeling sincere. It felt like deep down, if every little thing was worth celebrating, they were really saying that nothing would ever be good enough for them."

"So they took it too far in praising you?" Smarty Pants inquired. "Like celebrating every time you so much as talked or used the potty?"

Blushing a bit, Rainbow admitted. "Something like that. They didn't really start doing it until after I was out of diapers, not really sure what changed then. Anyway, I tried to talk to them, but they just wouldn't listen. And so, as soon as I was old enough, I moved out and moved away," She nervously went on to add. "Until now, I thought it was the right choice to make. But after today... I'm starting to wonder if maybe I didn't make them see how much I appreciated what they were trying to do: Even if it was misguided."

"My own relationship with my dad was complicated," Soarin stated as he put a hoof around his superior. "Still, complicated as it was, there were times when I knew I was making him proud. And even when I wasn't, that just made the affection and praise I got from my mom all the sweeter," Then he licked his lips. "Speaking of sweeter, I think it's about time for me to help myself to that apple pie!"

"Indeed," Princess Celestia agreed. "A deal's a deal." And she teleported her charges back to the dining room so as to let them enjoy the apple pies they'd been promised.