Everypony wants to baby Princess Celestia

Celestia was sitting rather calmly down on her throne, having just finished working on a few last-minute papers. It was only when the room fell oddly silent did the princess start to notice something was off. Looking around, she saw that nopony was around. There were no guards, butlers, maids, or pony seeking her audience. It was rather odd. Was it some sort of holiday? Then she heard a feminine robotic voice say out loud. “Hello princess Celestia! I'm happy to see you here! Let's get you ready for the day!"

The princess of the sun blinked as she squeaked as the throne started to morph, turning from its metallic feel to hard plastic. The back of her chair turned into plush material that molded around the princess's back. Princess Celestia sunk into the back of the seat. She started to get somewhat nervous, wondering what could be going on. Then she felt magic tendrils tugging on her mane as it was tied up in ponytails. Then she found a yellow T-shirt that read "Little Sunny Butt" on it over a picture of a smiling sun dressed around her chest. She squeaked as a tray appeared in front of her. She immediately tried to escape by flapping her wings. Still, there was a buckle around her waist, and she also felt relatively weak, as if some magical force was keeping her in the seat. The princess of the sun tried to use her horn to teleport, but it just fizzled, sending some sparks. Clearly, whatever spell was keeping her here was dulling her magic. When she smelled something wonderful, she looked down to see a pancake topped with a happy face made out of berries with whip cream, a side of scrambled eggs, and a sippy cup filled with orange juice.

"Ok, Luna, haha! I get it; this is a prank, isn't it!?" Celestia shouted, but nopony answered. She looked around, trying to figure out who made this for her?

"Well, I didn't make it," Luna yawned as she trotted, looking as confused as her. "But it does look delicious; it would be a shame to let this good food go to waste."

"Instead of worrying about the food! Can you let me out of this!" Celestia shouted back, wiggling to no avail; her rump was firmly planted in the plush seat.

Luna turned her head and tried using her magic to lift the tray, but that didn't work, she then tried using her magic to look for the enchantment, and then she saw a button on the side of the booster seat. She then pressed the button, and a voice replied, "error transformation is not allowed until all of Princess Celestia's meal is eaten by her. Note she cannot use utensils or her horn; she must be fed by hoof by another pony."

"Oh dear, it looks like somepony warped your throne; we'll have to play this game to get you out," Luna snickered.

"No way! I'm not going to be spoonfed! I can feed myself!"

Celestia saw some rubber fork and knife and tried to cut her pancake, but she felt a burning sensation on her hooves as if somepony slapped them. "Oww!"

"Bad filly, only big ponies use utensils."

Luna sighed, "look; obviously, we have to just do as the chair says."

"Fine!" Celestia frowned, glaring at blank air as Luna cut the delicious pancakes into small pieces and lifted them to her sister's mouth. The solar monarch's cheek turned to beat red as she took the bite. Thankful her sister didn't do anything goofy about it.

After Luna finished feeding her sister, she allowed her to drink down the cup of orange juice by herself until it was all gone. Celestia then felt a pang in her bladder and whined, "Luna, hurry and press the button!"

Luna did as her sister asked, pressing the red button. However, instead of releasing her, the chair began to morph. It was still hard plastic, but the tray had disappeared. It grew rounder around the mare's cheeks flushed red, feeling a gust of air around a hole around her rump as her tail was lifted up and cut, then the stub of what was left was tied with a little cute pink bow. The princess's cheeks flushed pink as she realized that this was more embarrassing than the booster seat! It was a foal's training potty!

"No way I'm using my personal bathroom!" Celestia cried out as she flapped her wings, but she couldn't move; she was stuck. Then a giant camera appeared in Luna's hooves as the robot voice said, "second transformation complete, the princess's potty throne. To proceed to the next transformation, please have the princess use her potty and take a photo."

"No bucking way!" Celestia shouted, then she whined as she felt soap suds pour out her mouth.

"Naughty foal, no bad words," the robot voice chimed, making Luna snicker and dawww. Meanwhile, Celestia had to swish her mouth with water; she spat it out into a cup that appeared in her mouth.

The princess of the sun then had her cheek pinched by her sister as she cooed, "awww, well, guess you don't have a choice."

Celestia tried to pull the T-shirt over her crotch as much as possible as she pleaded, "come on, there's got to be another way!" The princess was embarrassed and worried that she'll have to urinate in front of Luna!"

"I'll destroy the photo and this camera after this is done, ok? Just pee a little and let's get this over with," Luna explained soothingly.

The celestial monarch pouted as she started to pee into the potty. Still, then it grew from a tinkle to a torrent of urine, seeing she hadn't gone yet since raising the sun. Celestia's cheeks were a rosy red as she finished peeing, and Luna then cooed, "ok, raise your hooves and say I went potty!"

Without realizing what she was doing, Celestia did as her sister said, raising her hooves and exclaiming, "See, I went potty!"

"Dawww," Luna cooed as she snapped a few photos with her camera. The pictures then magically teleported and were framed on the walls nearby with "Celestia's first potty" labeled over them.

The princess of the sun was confused as to why she did something so embarrassing, and now the photos were on the walls! Celestia started to flap her wings and shout, "Hey, take those down now!"

Luna did use her magic to try to remove the photos, but they were glued to the wall. "Sorry, but I think they will stay until we finish this game."

Celestia glared at Luna, not trusting her now, as she snapped, "They better, and why did you make me say that stupid phrase!? You're enjoying seeing me be humiliated, huh!?"

"First off, no, I just was following the instructions on the camera, see," Luna turned the camera around and saw another rule "the caretaker has to make Celestia say and do something silly after she goes potty" "secondly, I didn't make you say or do anything it sort of came out, and I was hoping it'll catch you off guard. I do apologize. I'm not trying to make this worse for you."

It seemed Luna was telling the truth, but she still didn't fully trust her. "Ok, well, let's just get to the next transformation."

"Ok," Luna said as she pressed the button. The chair changed once more, with the seat still being hard plastic, but it was now shaping into a desk made for preschoolers with a wide pink plastic table laid out in front of her. Covering the table, there was a box of crayons, some glue sticks, a box of colorful macaroni, a box of popsicle sticks, and a container full of glitter. Celestia also found she was wearing a pink denim play dress with random paint splotches.

Luna snickered, putting a hoof to her muzzle. "Oh look, arts and crafts, remember those, sister?"

"Ugh, don't remind me! Starswirl used to make fun of my macaroni art all the time."

The voice interrupted the two, "Now Princess Celestia will make her sister a drawing with crayons and then an art creation her caretaker Luna will assist if necessary."

"Assist? What does that mean?" Celestia scoffed; she decided the first thing to do was draw a sun on some construction paper. But as she got the paper out, she turned to the crayon box. Oddly enough, she seemed to forget the names of the colors. She was too embarrassed to ask for her help as she should know her colors being over a thousand years old and a princess alicorn. But the information seemed to not be in her brain anymore!? "L-luna, I um, I need help with colors," she said sheepishly.

"Oh dear, this chair probably messed with your memory and intelligence. Ok, what are you trying to draw?"

"As..s..sun…" the princess squeaked with her cheeks flushing red.

"Ok, well, I think you'll need bright colors like yellow and orange," Luna explained as she took the two crayons matching the colors she described. "This one is yellow, and this one is orange."

Celestia nodded as she took the crayons with her mouth, and then she blinked, seeming to forget the shape of a sun. "um… what's the shape of the sun?"

"It's a circle," Luna gestured with her hoof.

A whiteboard appeared behind the princess of the night as she took a marker and drew a circle on the board. "See, that's a circle; it's round and has no sides."

Celestia nodded as she went to work; she did her best by drawing a sloppy circle with a yellow crayon. The princess then scribbled orange and yellow crayons together over the picture. It must've been half an hour before Celestia's finished as she held up her work. "Ok, I'm done!"

Luna looked down at the drawing with a smile; she clapped her hooves and cheered, "Oh, very good, Tia." The younger sister couldn't resist patting Celestia's head.

"What's my grade?" Celestia asked with her cheeks flushing red for some reason; she wanted to see how Luna thought of her drawing.

"Oh um…A! Your circle needs work, so you don't get a +, but the color is right, and I love how you tried to spell your name." Luna giggled, seeing Celestia's name written as "SeleStya" the throne must have regressed her sister's mind to a preschooler's.

"Yeah, I haven't learned my letters and numbers yet," the princess admitted shyly.

"Awww, it's ok, we'll get there; you're only in preschool; you learn that stuff in kindergarten," Luna said, giving her sister's nose a boop. "The chair said to make macaroni art as well. That will be messy for sure."

Celestia nodded her head as she got the glue and squirted it all over another piece of construction paper; she then looked up at Luna and asked, "um… what's your coat colored called?"

"it's a dark blue sweetie," Luna whispered as her cheeks flushed a little seeing that Celestia took darker colored macaroni and started liking them on the glue puddle. The princess of the night realized she was making a picture of her! Celestia then took popsicle sticks for the legs, glued them on the bottom of the misshapen pony she made, and then sprinkled sparkly silver glitter all over, finishing her work. Celestia held it up for her sister to see, proud of her work.

Luna smiled at the artwork as it appeared on the wall next to the previous one. "Hehe, aww, your acting adorable," she said, pulling the lever that had appeared, no doubt, the next phase of this rather odd game.

The chair morphed once more, keeping the pink hard plastic but now the tray was filled with a small teapot, a small plastic sippy cup, and a slice of cake. Celestia squeaked as her play dress turned into a frilly princess-style dress with white frills hiding underneath that went around her waist. The princess gasped as a pink pull-up slid under her rump. Celestia did her best to pull the dress down to cover up the new garment.

"Now it's tea time for Princess Celestia! The little filly simply needs to finish all her tea and eat her cake."

Celestia adjusted her dress a little before asking, "um, big sissy Luna can ya help me? Dun wana spill my tea."

Luna nodded, "of course, this should be easy; you love cake and tea."

The princess of the night then poured the tea into the sippy cup and adjusted the top making sure it was tight. She then spoonfed her sister once more with the cake, letting her chomp down on it. (Luna also noticed Celestia's teeth were much smaller, and there were gaps as well) if Luna had to guess, the chair adjusted her "age" to be around a three to four-year-old. The princess, however, continued to feed her while Celestia just loved the cake; it tasted lovely being a mix of vanilla cake with strawberry frosting. She finished the slice of cake she popped the sippy cup into her mouth. As Celestia suckled, she squeaked, kicking about in her dress. She didn't care that she was revealing her pull-up with the fear of wetting herself being much more of the issue on her mind and shouted, "Luna gotta go potty!"

"Oh dear, does this thing go back to the potty throne or what?" Luna asked out loud; she tried pulling the lever again.

"Error, Princess Celestia has not finished all the tea."

"So what? I doubt that pull-up can handle a grown mare's full bladder." Luna snapped back.

The chair began to sparkle suddenly as Celestia peered down, seeing that her pull-up was now a fluffy white mass of a diaper with her cutie mark printed on its front. The princess wiggled and whined, "N-nu, I big filly!" Although she felt like she couldn't hold it for very long.

"Seems like I'm the big sister," Luna said, taking the opportunity for alight teasing. "Now, just relax, drink your tea, and let it flow."

Celestia did as Luna said as she finished the rest of the tea, and her diaper began to fill the diaper with urine; the white padding swelled around her thighs as it felt warm and soggy.

Luna pulled the lever once the tea was made, watching the chair change as a new tray appeared with little plastic toys you find foals playing with. Various plastic keys and little things to flip and spin. The seat then went from a plastic to a cloth-like material as it enveloped Celestia and wheels appeared at the bottom with handles at the top. Buckles wrapped around the princess of the sun (with the princess squeaking as the straps were snug around her diaper), and as if by magic, her soggy diaper was replaced with a dry one with a Poof of foal powder. The only new item of her attire was a frilly yellow bonnet, and her princess dress was now a sunny yellow. But then Luna looked around and noticed the entire throne room was gone! They were out in some park with a nearby meadow and a pond filled with ducks. "Oh, we're at a park?"

Celestia stared around, worried she'd be seen in such a state, starting to worm in the stroller. Moments later, the little robot voice spike up. "No, you're still in the castle; it just looks like you're in a park; please have the princess go on a stroll. Luna, you're in charge; remember to watch Celestia and make sure she's happy."

"Ugh! Now I'm going from big sis to full-on mom," Luna grumbled as she saw that a giant yellow diaper bag was now around her chest. She went over to Celestia, patting her diaper, seeing it was dry and full of foal powder. "Ok, all dry what will calm you down…oh a pacifier!"

She plopped a giant yellow pacifier into the princess's mouth. She watched her suckle on it, which did soothe her whimpering. The little princess then began to bat around the toys as Luna went to the back of the stroller and began to push it with her magic. She technically wasn't moving, but it felt like she was with the scenery moving around them as they continued to trot. Luna's cheeks flushed red seeing ponies passing by waving their hooves; some even gave Celestia's diaper a pat, and she heard the padding crinkle!

"What is going on here?" Luna asked herself, being somewhat confused, but she continued; then she heard Celestia start whimpering. The princess then sniffed the air, and it reeked! She trotted around the stroller and saw her diaper was sagging a little and smelt foul.

"Ugh! No!" she then got a fresh diaper and some foal powder going about the change. Celestia was embarrassed yet felt comforted by Luna's presence and seemed to not mind. Thankfully it didn't take too long before she was all nice and fresh once again put back in the stroller. "Mmm, what next?"

Luna pulled the lever near the stroller again. The scenery unfolded as if they were screens going back into the stroller. Luna gasped, seeing the throne room now had a foam material on the ground and the walls covered with little suns on the wallpaper. The throne then turned into a giant white plastic toy; the tray was now designed with blinking-shaped lights that made noises as classical music played from speakers built into the chair. Overhead printed above the smiley face read "Baby's First Throne" by Hasbro.

"Oh my, that's one fancy baby toy." Luna snickered as she watched Celestia mindlessly bashing her hooves on the tray, seeming to have her mind regressed to that of a year old foal.

The princess of the night was feeling abit exhausted from babysitting her sister. She then sat down on a rocking chair that appeared out of nowhere and kept an eye on Celestia, seeing her immersed in her toy, getting praises as she pressed the colorful buttons and bounced on her padded tush.

Luna noticed a giant clock overhead with various "times" replacing the numbers from playtime to feeding time, nap time, and pickup time.

There was only one hand on the clock as well as it was stuck at feeding time. The playful, colorful throne started to gain height as it turned into a highchair with Celestia's dress now gone being left in nothing but her diaper and a pink bib with her cutie mark printed on it, tied around her neck.

"Oh, it's feeding time!" Luna chimed as she got up and trotted over; she saw on the tray a jar of mashed yams and a giant foal bottle filled with formula.

Luna took a deep breath as she took a rubber spoon full of the orange goop, sailed it over to Celestia's mouth, and cooed, "Ok, here comes the choo, coo train!"

The mare squealed as she opened her mouth, and she got a mouthful of the stuff as she mashed her mouth, getting the goop over her face and bib. Luna couldn't help but giggle at Celestia making adorable faces as she chewed on her meal. The princess continued to feed her sister, washing her face and keeping her clean.

"Oh, you're such a messy eater; there's more food on your bib than in your mouth," Luna commented.

Celestia just giggled and cooed as she booped Luna's muzzle; she just snickered and continued to spoonfeed her. Eventually, Celestia ate every last bit of food, and Luna wiped her mouth and Celestia's face with a foalwipe. Then the princess of the night lifted a bottle, placed it into her mouth, and watched as she chugged down the contents. Celestia greedily suckled the bottle making adorable gurgling noises as she did so, and Luna again hs to use a foal wipe to clean up the milk that dribbled from her mouth. Celestia grasped the bottle with her hooves, and Luna stood back and dawwwed, seeing the princess holding the bottle herself. The princess of the night took the camera and snapped a few pictures that ended up on the wall next to her being on the potty.

After the bottle was empty and Celestia was just sucking on air Luna saw her eyes were closed, falling asleep.

"Ok, I believe it's naptime," Luna cooed; she took the bottle out of her sister's mouth and took off the bib. The princess of the night then watched as the back of the chair became flat, lowering Celestia into a table-like surface. Then the furniture started to transform into a crib as the back of the chair slowly laid down with yellow bars appearing around Celestia. She was then dressed in a nightblue sleeper with Luna's cutie mark on the back flap where the princess's diaper bulge could be visibly seen. A mobile appeared overhead with little sun and moons swirled around Celestia's head as a soft nursery rhyme song came out.

"Hello, Princess Luna," the chair whispered, "now I know you're tired, but you need to stay up and watch the baby until she gets picked up."

Luna yawned, seeing at this point the silly throne was testing her. "Fine, but my sister will be normal after all of this, yeah? Because if she doesn't, I'll hunt down whoever did this."

"Oh, no need for threats; Princess Celestia will be a big pony tomorrow; I just thought she could use a nice break from all of her boring princess."

"Ok, Discord, just hurry your butt over here," Luna grumbled.

"Wait, how did you figure that out!?"

"I didn't; you just told me," Luna stuck her tongue out. "Also, who else would be powerful and crazy enough to do this to us? I don't have Twilight and her friends turn you back into stone because this was a lovely little day. But like I said, Celestia better not be affected by this in any way."

"Ok, ok, easy now, she'll be back to normal, ok! No need to have a tantrum."

Then, a word humming noise as Luna turned her head and saw a giant pink horseless carriage appear. Discord came out and opened the side door showing off a car seat. "Ok, well, I think it's pickup time."

Luna lifted her sleeping sister and helped strapped her into the car seat, making sure the straps were snug around her sister; she dawwed seeing Celestia was wearing nothing but a diaper and a bright pink T-shirt that read. "Sun Butt" The princess then tapped Celestia's diaper, seeing it squish beneath her hoof as she said, "well, she'll definitely need a change when you get back to your place."

"I know; I got my whole house babyfied for little Tia," Discord added. Luna popped a pacifier in Celestia's mouth before closing the door. She said, "ok, Celestia better back here by six a.m tomorrow."

"She will be, ok?" Discord scoffed as he got into the driver's seat.

Luna then turned to Celestia, still sleeping away, and cooed, "by tia, hope you have fun."

She stepped back as the minivan took off into a portal; everything was back to the normal-looking throne room, with all the embarrassing pictures now gone. Luna yawned and stretched her wings and trotted off out of the room to find her bed, where she planned to crash for the rest of the day.