Pinkie Pie was bouncing upon her squeaky balloon diaper as her belly grew out. She was quite pudgy from all the sweets she had been stuffed with. Big and soft, like a fat pink pillow on top of a rubbery cushion! Not that Pinkie minded at all, this dream was far too fun!

There was a knock at the door.

“Oop!” Pinkie giggled. “Sorry, customer-type pony! I'll be with you in a bit, and… wait.”

She crossed her forelegs, still bouncing up and down. “How does that work? This is a dream, and I didn't dream any customers!”

The door opened anyway, and Nightmare stepped through with eyebrows raised. “A lucid dreamer? Interesting.”

“Heey, I know you!” Pinkie said, pointing a hoof at Nightmare. “You're the evil Black Sooty! I bet you've come to take away my fun!”

“Not at all,” Nightmare replied. “Just keep bouncing away… I've just got a few suggestions for your sweets and pastries!”

She began conjuring foods out of thin air, and piling them onto a plate to levitate over to Pinkie.

“Wow!” Pinkie giggled, taking one of the pastries and eating it in a single bite. “Maybe I guessed wrong, Bad Sooty! You're more of a Good Sweety!”

She ate another, and then another, and had some of the cupcakes as well, then switched to some of the bars of chocolate. Then she had a slice of big cake, and was about to move on when she frowned.

“Hey… I feel kind of funny...”

“You do?” Nightmare asked. “Well, maybe you'd better wash it all down with a drink of hot cocoa!”

Pinkie took the mug in both hooves, somehow managing to do that while bouncing and without spilling a single drop.

As she did, however, Nightmare's horn flashed, and the outfit Pinkie was wearing got thicker and crinklier – more restrictive, harder to get out of and comfier to wear.

Pinkie slurped out the last of the hot cocoa, a mustache of whipped cream across her face. She giggled as she licked herself clean. As she placed the now empty mug on her padding, she noticed how the padding seemed to have sucked her in a bit more, not to mention a silly tutu wrapped around her waist. “Heeeeeeeey, I wasn’t looking this silly a second ago! I mean, not that looking silly is all that bad, but I like to know when I’m going to look sillier!” She watched as Nightmare walked around her balloony diaper, pressing it a few times to elicit a few squeaks from the material.

“Nonsense, I haven’t done a thing! A dreamer such as yourself must have just made things even more fun. And I have to say, you certainly look like you’re having fun.” Nightmare responded. She leaned into the diaper, pressing her entire body into it. Pinkie giggled as she felt the air shift around from Nightmare’s pushing, her mouth stuffed fuller with some more sweets as she did.

“Heehee, well, if I wanted something sillier than this, I could do that! This is easy peasy silliness, not professional silliness!” Pinkie concentrated, imagining her padding even bigger, a silly bow wrapped around her mane along with some puffy booties on her hooves. She bounced in place as Nightmare leaned further into her padding, looking like she was ready to fall into the puffy rubber at any second.

“I don't think that's quite silly enough,” Nightmare said. “After all, this diaper isn't even as big as this room – let alone as big as all of Ponyville!”

“All of Ponyville?” Pinkie gasped. “That is silly!”

Then Nightmare slipped backwards into the diaper, vanishing through the side of the rubbery material.

Pinkie blinked. “What just happened? Black Sooty, are you okay?”

There was a snatch of Evil Laughter, and then the diaper began to expand – faster and faster, pushing Pinkie against the ceiling with a surprised yelp.

Wisps of starry nebula came puffing out of the seams as the diaper's pressure expanded, pressing in on Pinkie more and more as it pressed outwards more and more, until the whole building exploded and Pinkie's diaper shot instantly to the size of a great big castle.

Pinkie herself was completely lost in the puffy, silly bulk, the booties and bow and the tutu all pressed into her by the diaper-material which seemed to surround her completely.

The wisps of star-smoke condensed into Nightmare's plushy form, and she beeped Pinkie's nose. “Now that is silly.”

Then she vanished again.

Pinkie giggled, then got ready to shrink the diaper back down.

Nothing happened.

Then she tried to wake up, and nothing happened then either.

“Oopsie...” she blushed. “I think I might have not thought this through...”

Rarity sucked her pacifier, groaning as she bounced from the ceiling wrapped almost completely in the crinkly, plushy 'naughty' foal clothing. Her diaper squished with every bounce, blush-inducing and cringe-making, and she tried not to remember how she'd made it all herself.

Then the doorbell rang, and Rarity's embarrassment got if anything even worse.

Rarity wiggled in her bouncer, trying desperately to free herself. The door knob turned and the door creaked open to reveal Rarity's commissioner standing in the doorway. They reached up to flip the hood off of their head, Nightmare stepping into the boutique. Rarity's eyes widened as she bounced in place, desperately tugging on her restraints to try and free herself. "Well, well, it looks like my outfit came out absolutely perfectly." Nightmare walked around Rarity, examining her from every available angle. She reached down to pat at Rarity's rear, noting how squishy her diaper was. "Ooh, but it looks like this silly foal had a bit of an accident. Don't worry, I'll get you into a fresh diaper.~"

Rarity looked over her shoulder at Nightmare, not sure if she was willing to believe what she had just heard. Her struggles relaxed as Nightmare’s magic surrounded her, a few of the restraints unlocking to allow her to be lifted out of the harness. Rarity kicked as she was hovered over to a changing table where Nightmare had puffed a thick diaper onto the front. It was even thicker than her outfit already was, a bright purple covered in stars. Despite its thickness, Rarity let out a huff of air. Any thick padding was better than a wet pair. To her surprise, though, rather than begin to undo the straps on Rarity’s rear, Nightmare plopped the unicorn down on to the diaper, immediately beginning to wrap the thick diaper around Rarity’s outfit.

“Mmfff!” Rarity protested, trying to struggle the best she could. “Mmmm!”

“Hm?” Nightmare asked, then gasped. “Oh! I'm so sorry! You're right, I completely forgot!”

She reached for a big bottle of foal powder and puffed it out onto the diaper, then taped it in place. The sheer bulk of the diaper was unbelievable, and Rarity found herself sitting high in the air even though she should have been on the table.

“Much better!” Nightmare said, patting the front of the diaper. “Now everypony who looks at you will know I'm taking care of you!”

She pressed on Rarity's diaper again to make it crinkle, and then picked up a bottle of milk. Rarity frowned, wondering if this would mean her pacifier would be taken out, but then discovered that the pacifier itself had a special slot in it – one which Nightmare promptly placed the bottle of milk into. The bulb of the pacifier began to leak out creamy milk, and Rarity started suckling on it automatically.

“There we go,” Nightmare cooed. “Now you're all set!”

She picked Rarity up in her magic, and put her right back in the bouncer again.

“Now, be good and don't run away,” she warned the unicorn – not that Rarity had a hope of leaving. “I'll be back in a few days to check on you~”

Rarity bounced in place, suckling on the bottle as Nightmare left, the unicorn’s dream dissolving away behind her.

Rainbow Dash rolled around in the thick diaper as she was carried back from the stadium to the Wonderbutts academy, thoroughly enjoying the comfy ride. She gave a wistful sigh, wishing she could have stayed in her field sized padding, but considering how she couldn’t move in it, let alone fit in the academy, she supposed she’d just have to live with it. Besides, Spitfire said she had something special planned when she got back. Dash flopped onto her front, wiggling her padded rear excitedly as she imagined what she was in for. A new routine rehearsal? More puffy outfits to admire? Anything for her Wonderbutt idols!

There was a rustle as her diaper was dropped onto the ground, falling open as Dash stood up, posing dramatically. “The world-star mascot has returned!” She gloated. It wasn’t until a minute later did she realize she was alone in the room, aside from the large padding. Dash dropped back onto all four hooves, looking around. “Uuh, guys? Soarin? Anypony here?” Rainbow Dash took a step into the room, only to hear a voice bark from behind her.

“And where do you think you’re going, Dash?”

Rainbow Dash turned around to see Nightmare Moon standing tall behind her, dressed in Wonderbutts themed military jacket and hat, smirking smugly down at the mascot.

“N-Nightmare?” Dash asked. “What are you doing here?”

“Wrong question!” Nightmare snapped. She flipped a baton around, pointing it at Dash. “The right question is why you aren't in your new outfit!”

Dash blinked. “What new outfit?”

“That one!” Nightmare replied, pointing at the outfit in question.

Rainbow Dash looked at the outfit in question, and couldn't help but blush – it was huge, and poofy, and looked more like a whole-body suit than a conventional outfit.

It was lying there, unzipped and open, so it was a little hard to tell what exactly the outfit was of, but Dash could see crinkly black material along the legs and a puffy built-in sleeper in dark purple with lightning-flash gathers.

“In you get!” Nightmare demanded. “Mascot, you need to get into your new outfit before you can do proper training!”

Completely lost, Dash hesitantly started to put the outfit on.

It turned out to be a lot easier than it looked. The moment she put a hoof in the foreleg of the suit, it went straight up her leg with an easy gliding motion and then got stuck in place.

The same thing happened with the hind legs, and the wings – big puffy ones which covered her real wings – and then the zipper went up.

Nightmare helpfully held up a mirror, and Dash realized with a start that she was like a big, bulky, padded version of a Shadowbutt.

“Now, get to it!” Nightmare demanded, ushering Dash out onto the training ground. The newly-Shadowbutted Dash waddled a little as she trotted out, her rump swinging back and forth, and then took her position on the grounds.

“Give me a fifty-meter crawl!” Nightmare ordered. “Now!”

Dash immediately dropped onto her front, gulping as Nightmare ordered her around. She began to crawl across the ground, her padding pressing down into the dirt as she did, rubbing her gently as her rear swayed about even as she crawled. Her padding crinkled loudly as Nightmare walked beside her. “Faster!” She barked. Dash did her best, struggling to move in the thick warmth of the suit. Even the 50 meters was tiring, leaving Dash panting a bit by the end of it.

“50 butt bounces, now!” Nightmare cried. Dash rolled onto her rear, reaching down to take a hold of her hind hooves. She began to thrust upwards, bouncing into the air. Her padding puffed out clouds of foal powder with each bounce, filling the air as Dash bounced across the ground. “Higher! Higher!” Nightmare grinned as Dash complied, soaring up into the air with each bounce as if her diaper was full of helium. It wasn’t too long before she was done, leaving her tired from the exercise.

“Up on your hooves, you’re climbing the wall!” Nightmare demanded. Dash looked up to see a big wall of rubber with a few ropes hanging down the side. She hurried over to the ropes, wrapping her hooves around it. She tried to flap her wings to try and help her ascent, but the wings of her suit prevented anything beyond simple wiggles. Struggling, Dash began to climb the rubbery wall, her hooves squeaking along it as Nightmare soared up to the top.

It took her more than a minute to finally reach the top of the wall, at least a hundred times longer than it would have been without her Shadowbutt suit, but Dash had to admit that she was doing a lot of exercise at the same time as a result.

“Now, across the high wire!” Nightmare barked.

Dash did a double-take, looking at the rope. It wasn't quite a high wire, but it was pretty high and quite long.

“Get to it!” Nightmare demanded, seeing Dash hesitating.

Dash waddled out onto the rope, blushing as the pressure squished her diaper into the rope and made part of it hang down either side. She had to shuffle slowly along the rope, coming close to falling off at least twice, and then finally slipped off into the net below.

“That's no good!” Nightmare said sternly, shaking her head. “We'll have to do that one again later! Now, keep moving! Do the water obstacle!”

Dash waddled into motion, butt shaking back and forth, and blushed under the suit.

She reached the water obstacle and plunged into it with a splash, then felt herself becoming heavier and more sluggish almost immediately. Looking down to see what the cause was, she blanched – the whole suit was soaking up the water and becoming thicker, puffier and more waterlogged!

Straining, Dash nearly reached the end, then flopped down into the now-mostly-dry pool as her padding and puffy suit absorbed the rest of it.

“Not good at all!” Nightmare judged. “You'll need to do that much quicker tomorrow! Now, clean the barracks!”

She pressed a hoof into the incredibly wet padding of the suit. “That should do to help you clean up! Move it!”

Dash struggled to reach the ladder at the side of the pool, jumping a few times before she managed to wrap her hooves around the sides. She pulled herself up and flopped onto the ground, only to have Nightmare push on her butt to move her along. Dash wobbled and waddled squishily back to the barracks, her rump swinging left and right. With a squash, she plopped her rump onto the ground of the barracks, swiping her rear left and right as she began to scrub the floor. “The whole floor, mascot! And you better be ready for our next session!” Nightmare snickered, watching as Dash whimpered and waggled her tushie back and forth.

Fluttershy wriggled about in the belly of the puffy monster, pressing against the plush walls of her prison. “P-please let me out Mr. Wolf!” She cried. The belly just shifted around, squishing her further.

“Mr Wolf? I do believe you’re mistaken!” Fluttershy heard a voice echo around her. She was bounced around in the belly more as the beast shifted around. She heard the sound of a zipper being pulled open, and suddenly she tumbled out of the tummy, flopping onto the ground of the cave. Shaking her head, Fluttershy looked up and gasped as she saw a pitch-black wolf grinning over her, its belly opened like a suit with an oversized zipper along the front.

“W-who are you?” Fluttershy asked, getting to her suit's plushy feet. It felt odd to be on all fours, for some reason – something about the design of the suit which tried to tug her into a rearing position – but she shrugged it off in favour of finding out what was going on. “A-and, um, thank you for letting me out...”

“Me?” the wolf asked, zipping herself up. “I don't think that matters… what matters is what you are!”

She pointed a thick, overstuffed plush paw at Fluttershy. “It's not every day someone meets a Draconequus!”

“But I'm… not...” Fluttershy began, puzzled, then looked at herself again. “Oh. Um… that's just the suit...”

“Really?” the plush wolf asked, her star-scape tail twitching back and forth. She planted a paw on the tail of Fluttershy's sleeper. “But this looks real. And so does that.”

She flicked the thick diaper, making Fluttershy squeak in surprise.

“S-stop, um, please?” Fluttershy tried.

“Oh, I see what's going on!” the wolf told her, nodding. “You're just pretending to be a helpless little pegasus, when really you're a Draconequus who's turned herself into a costume! That's just the sort of thing a Draconequus would do!”

For a moment, the idea floated through Fluttershy's mind. Maybe this wolf was right?

As soon as she thought that, though, her padded suit began to glow. It puffed out, expanding and gaining definition, and Fluttershy realized with a jump that she was feeling some of the sensations from the sleeper's surface.

“Of course...” the black-furred plush went on, thinking out loud. “If you were a Draconequus, then I bet your chaos powers would just try to trap you all the time! Chaos powers out of control would mean you couldn't help but get tangled up in silk bags, or buried in pillows… or even chased by big, crinkly hydras trying to decide which head gets to eat you today!”

Nightmare chuckled to herself.

Honestly, with this one she didn't even need to control the dream herself. Just suggest something, and the paranoid Pegasus did all the work…

Even as she watched, the suit was joining up – connecting together, making it less of a patchwork of bits and more of a single continuous whole. The suit puffed out, as well, making it thicker and more obvious and blush-inducing.

Fluttershy and the suit were becoming harder and harder to separate, as her imagination ran wild and convinced her that she really was a plushy Draconequus – that the bit with being a pegasus had just been a silly idea, the kind of silly idea that everyone knew Draconequui had all the time.

As she did, she realized that Draconequuses like herself had powerful Chaos powers, just like Nightmare had suggested, and a hundred big plush toy puppies rained down around her.

“Um… stop, please?” Fluttershy asked, as the puppies began barking and running around, dragging sleeping-bags and pillows out of nowhere, and began getting Fluttershy all tangled up in bags and pillows and all manner of plush things.

She tried to do the Draconequus claw snap thing, clumsily, but the plushy twik sound that produced had none of the crispness of when Discord cast a spell. It backfired, too, making Fluttershy suddenly be surrounded by a hundred puppy plushes almost as tall as she was.

Half of them turned into kittens, and then the horde of super-sized toys began batting Fluttershy-Draconequus about like a ball or a cat toy.

Squeaking in surprise, Fluttershy tried to use her chaos powers again. This time they did get rid of the critters, but instead stuck her in a super-sized diaper and a pair of mittens so thick she couldn't do a clawsnap with either one.

“Aww… is the baby Draconequus still learning her powers?” Nightmare asked, smirking. “That's okay, she's still wittle...”

Another burst of wild 'Chaos Magic' flashed through the dream, and a big crinkly hydra appeared with bibs on all seven heads. Each head was large enough to swallow even Fluttershy's super-sized diaper down, and they all began sniffing at her with interest.

Deciding her job was done here, Nightmare loped off behind a rock and cancelled her transformation.

“Did you like that time as a wuffy?” she asked the captive Princess of the Night. “No? Aw well...”

Her horn flashed, and she stepped through the realm of dreams to visit the last of the Elements.

Applejack bobbed about in the air, still grumbling a little to herself as she looked down below her. Flim and Flam had finally jumped off of her suit and were now addressing the crowd that were all admiring their new advertising blimp. Applejack tried once more to wiggle her hooves, but the suit was squeezing in so tightly she couldn't do a thing but drift about enjoying its squeaky embrace. As she watched the crowd of ponies, she noticed one especially tall and dark figure step up to the front of the crowd, addressing the two brothers directly. Applejack twisted her head and flicked her ear in hope of eavesdropping in on the conversation below.

Despite how high she was floating and the continuous creaking of her suit, Applejack was able to hear the exchange happening below.

“I must say, this new blimp of yours is absolutely marvelous!” The dark mare said. “But I must ask, could one hope to order a custom-made Dirigible suit?”

“Why, custom is the only way we do things around here! You name the features, and we’ll have them all ready for you lickety-split!” Flim boasted.

“What’ll it be? Extra frills? Extra bounce? Everypony enjoys more bounce in the booty~” Flam added in.

The mare chuckled, looking up to Applejack floating in the air. “Oh, both of those sound like wonderful additions. I expect the diapers are especially absorbent as well? We wouldn’t want any foal accidentally leaking, now would we.”

As their conversation continued, Applejack wiggled about as she could have sworn she felt something shift in the suit. The rump seemed to have ballooned up a bit bigger, and there was the sound of something rustling in the breeze along her rear.

“Of course! Why, you could practically fit a whole lake in the padding! I’m sure they won’t have to worry about leaks anytime soon!”

“And anything can fill the suit? Air, helium, water,” The mare paused. “Cider, perhaps?”

Flam laughed, Applejack squeezing her legs together as her padding seemed to grow a bit thicker, not noticing a valve appearing on one of her flanks. “Oh, just you wait and see! You’ll have a cider balloon so big, you could squish Canterlot castle beneath it!” The stallion trotted over to a tank that had not been there before, placing his hooves on the valve. Giving it a hard twist, a hose extended up from the machine, up, up to the Applejack balloon above them. Applejack’s eyes widened as she felt the hose connect, and something heavy and damp being pumped into the suit.

The cool liquid pooled at first in the bottom of the suit, making Applejack wobble about a bit on the end of her tether as the weight distribution changed. The whole sensation drove her to blush, shaking her head and trying to protest as best she could – though all that did was make her wiggle more obviously and with less balance.

The amount of cider grew quickly, though, and before long the bulk was starting to counteract the bouyancy of her suit. Applejack began to descend, her blimp-like suit approaching the ground with a belly full of fizzy drink, and she bounced off the ground with a springy, sloshy boi-oi-oi-oiiiing.

“We've got adjustable altitude, too!” Flim proclaimed. “You can have head height, tree height, or no height at all!”

“Let's see head height,” the mare said. “No… a little higher. So it goes just over the heads of most ponies.”

“Coming right up!” Flam said, pulling a lever on the machine. “But not too far up!”

Applejack's long, sloshy bounce stopped, and she floated upwards again a bit. Blushing, trying to come up with some way to ignore her predicament – to no avail – she felt her suit fill with liquid more and more, and felt a fizzy popping feeling from all the bubbles in the cider now inflating her suit.

Finally, it seemed to stop, and she looked down – seeing herself about the height of a house.

“That looks too high to me,” the mare told Flim and Flam. “Can we make her come down a little?”

“Of course!” Flim agreed.

“Just a matter of liquid ballast!” Flam confirmed.

Applejack wondered what they meant, then watched with some bewilderment as the cider tube detached from her valve. It fell back a short distance, then rose again, and Applejack's eyes had just enough time to widen before the hose went into her mouth and pumped some cider into her.

“Mmpphh!” Applejack protested as she began to fill with fizzy drink. Her hooves wiggled as her suit sloshed about, causing her to fall back to the earth. Her padding squeaked as it dropped onto the ground, making Applejack blush from the impact, only to start floating back up into the air. Flam wiggled the valve on the machine a few times, the cider starting to come in uneven bursts. Applejack filled up some more, her belly stretching out and pressing snugly into the interior of the suit as she fell once again. This time her head was squished under the rest of her body, causing her to let out another muffled moan as she felt the weight of the bouncy material squeeze down on her.

The cider in the hose became stuck, causing it to bulge and swell as it tried to squeeze under Applejack’s suit towards her mouth. The pause in cider and rippling from the bounce shook more carbonation loose, making Applejack’s suit swell further and lift her up once again. The cider bulge rushed forwards, squeezing into her mask to obstruct her view and force its way down into her. Once again, she fell to the stage, squeaking and creaking as she continued to bounce in place from the continually shifting pressure. “I, uh, oh dear. My apologies, madam, I do believe we’ve encountered a bit of a problem.” Flim said, watching Applejack bounce slowly, stretching ever bigger.

“Oh, not to worry,” Nightmare responded, grinning widely as she watched Applejack’s continual bounces. “I’d say the suit works perfectly.” Nightmare turned, her horn flaring as she left the farmpony’s dream, patting her belly once again. “Ooh, wasn’t that fun, my widdle Woona? All your friends are enjoying their puffy dreams, why don’t you?” She heard some muffled protests and wiggles from inside her, making her laugh. “Lonely, are we? Maybe I ought to get your sister involved? I remember how much she enjoyed teasing her little sister. I’d just love to see her being the little one now…”

Smirking at the sound of Luna's protests, Nightmare wound her way across the world of dreams to return to Luna's own dream. Once there, she spent a moment constructing an appropriate set of scenarios, then jumped from there to the dream of the Sun Princess herself.

Celestia was sitting on her throne in the Canterlot Castle audience chamber, much as she'd done for over a thousand years. Ponies came to her with important things for her to give her opinion on, and she gave her opinion as best she could – just as she always did.

This time would be no different, she knew.

There was a momentary flicker, and Celestia frowned before dismissing it. A cloud, perhaps.

“Guards?” she began.

One of the unicorn guards looked back at her, and did a double-take.

“Is something the matter?” Celestia asked, a little surprised by the guard's behaviour.

“I – uh – not at all, Princess,” the guard apologized. “I was… never mind.”

Celestia nodded to herself, deciding the guard must be a new one. “Very well. Now, the Day Court is in session.”

The guards opened the doors, and the first of a long line of pony petitioners came in.

Used to – and sighing over – the looks of awe she got from her little ponies when they first saw her, Celestia saw nothing unusual with the way her subjects pointed at her as they entered. Some of them seemed to be asking one another questions, and others were even averting their eyes.

Celestia chuckled – she knew she was the Princess of the Sun, but she wasn't actually blinding to look at. Some rumours.

The first petitioner asked her question, and Celestia answered, sitting down on her comfortable throne.

It felt softer than usual today.

A few more ponies stepped forward to ask more questions (one particular pony asking repeatedly if she enjoyed bananas. Whatever that was about) or place some form of request or another for changes to the city. Often she responded by simply stating that it would need to be reviewed later and having one of her scribes scrawl the request down. It was very rare anypony made a suggestion that she found herself agreeing with to any extreme extent, and even then she knew she had to curb her excitement and be sure to look at something from every angle.

Celestia shifted in her throne, thankful that the cushions seemed to have been fluffed recently. This certainly seemed like it would be a long day. As she called up the next pony, her gaze drifted off to the window, wondering what it was she had seen. Possibly a bird having zipped by? It seemed too large for that, and she wasn’t familiar with every species that inhabited Equestria. Perhaps Philomena had gotten out of her cage again. Her attention was suddenly drawn back to the court when she heard an odd question.

“Do you get any vacations?”

Celestia turned to see a small filly looking up at her, wonder in her eyes. “I’m sorry, dear, what was it you wanted to ask?” Celestia said, giving a heartfelt smile and feeling a little guilty for having missed the child’s question.

“Well, you’re always ruling over everypony, and my friends say you get to do whatever you want, but I think you’d get tired after all that time? Don’t princesses get breaks too?” Celestia couldn’t help but smile a little more, looking down at the filly.

“Oh, well, not very many I’m afraid. Luna and I are usually very busy, it’s rare we have time off to truly enjoy ourselves.”

“Would you like some time off?” the filly asked, curious.

“Well… I suppose I might,” Celestia admitted. “It would be nice to relax.”

The filly nodded sagely, and Celestia suppressed a giggle at the sight of such a small pony being so confident.

“I think you should have a vacation,” the filly said. “That way, you can enjoy yourself and be free of all adult responsibilities!”

Celestia blinked. “...pardon? Adult responsibilities?”

She frowned. “I'm not sure what you mean, dear.”

“Isn't that why you're wearing a diaper?” the filly asked.

Celestia's jaw dropped for a moment, before she caught herself and closed her mouth again. Looking down, she saw – to her shock – that the comfy cushion she'd been sitting on was really a comfy diaper around her haunches.

She blushed, unable to help herself, and realized why the guard had been so surprised.

“Sister?” came Luna's voice. “Is something wrong?”

Celestia looked around, feeling grateful for the interruption, and saw Luna trotting out from behind the dais. She was so relieved she didn't notice the slightly off colouring of Luna, or the way some of her looked distinctly… stitched.

“I'm sorry, Luna, I'm afraid I'm busy-”

“Celly, don't be silly,” Luna said, and Celestia blushed again as Luna used an old foalhood nickname that was definitely not for public hearing. “You have been working yourself without break since a thousand years hence – now that I have returned, you should learn to take proper breaks.”

Celestia tried to hide her embarrassment as she reached down and attempted to remove the padding around her flanks. “Luna, I’m really very thankful that you’re back, but I can’t stop ruling just because you’re here. It’s all so much, it wouldn’t be fair to push it all onto you so quickly.” Celestia grunted a bit, finding the tapes of the diaper to be far more stubborn than she would have expected.

“Celly, please, it’s no trouble at all! At least let me help answering our loyal subjects’ wishes. Considering your… attire, perhaps you need the break more than you realize.” The plush Luna smirked. Celestia paused, looking down at the padding, then back between Luna and the filly.

“I… well… I… suppose it wouldn’t hurt if I go… clear my head a little.” Celestia said. Luna gave a small smile as the sun princess stood up out of her chair, the padding crinkling softly as she did. Blushing brightly, Celestia began to waddle out of the main hall, hoping none of the ponies standing in line were paying too much attention as she left to how her rear swung left and right. Slipping into a hallway as the plush Luna took her place on the throne, Celestia let off a soft sigh and stared down at the diaper. What in Equestria had caused this to happen? She wasn’t even aware they had kept such thick foalish garments in supply, let alone where they would have been kept!

Celestia tried a few more times to tug the padding off, but not matter how she yanked and pulled, her hooves kept slipping off of the tapes. Her horn flared up as she attempted to remove the padding via magic. All that resulted from this endeavor, however, was her giving herself a rather embarrassing wedgie. Shaking her head, Celestia began to waddle down the hallways to her room. She needed some privacy to figure these odd circumstances out.

When Celestia opened the door to her room, however, it was only to be confronted with yet another surprise.

Gone was the bed she could swear she'd slept in just last night, replaced by a high-sided crib – though still one large enough to admit her, and to let her sleep quite comfortably. Her wardrobes of dresses – collected from special occasions over the last few centuries – had been replaced with an open chest of drawers stuffed to overflowing with foalish diapers and other such things, and with a large, well-padded changing table.

What had been a fine collection of understated art from around the world was now a dozen big, dopey-looking plushies of all kinds of creature, and even her regalia stand was now a large foal's toy instead.

At least Philomena's cage was still there, the phoenix asleep with her head under her wing.

“What on Equestria...” the Princess asked herself, looking from the mobile over the cot to a crudely-crayoned colouring book. “What happened to my room?”

“Is there something wrong with your room, Princess?” asked somepony from behind her, a voice she felt was familiar but couldn't quite place. One of the servants?

“It shouldn't be like… all this!” Celestia said, pointing into the room to the little-filly aesthetic of almost the whole room. “I do not live in a room like this! I am not a foal!”

“But you're wearing a diaper,” the pony replied. “Don't foals do that? And I think you might just need to relax a bit – you've been so stressed recently.”

Celestia blinked.

“Doesn't this seem strange to you?” she asked, a little startled.

“Not at all, Princess,” the other pony said. “I tidied your room just a few hours ago.”

Celestia trotted up to the dresser, pulling one of the drawers open a little further to inspect its contents. It was filled to the absolute brim with thick puffy padding, some looking more like pillows than actual garments for foals, each row a special design. “Is this some sort of joke? I know for a fact April Foal’s day is coming up, did the staff decide to start early this year?” Celestia looked back to see a rather dark maid standing in the doorway, dressed in an overly frilly and puffy outfit, complete with feather duster clutched under one wing.

“I can’t see how it would be a joke, unless it is one I wasn’t brought in on. Are you sure you’re feeling alright, princess?” The maid asked. Celestia was having trouble taking in everything at once. She stumbled over to a large heart shaped beanbag chair and flopped down into it as she stared around the room once more. Even looking up at the ceiling she noticed little glow in the dark stars and a sun and moon had been painted above the crib.

“This is absolutely ridiculous!” Celestia cried out. She leaned forward, her hooves causing her diaper to crinkle again. She looked down at the puffy garment, remembering why she had come here in the first place. “Would you please assist me in removing this diaper? I believe I have some stern words I need to share with some of the staff, and I do not wish to appear before them looking so silly.”

The maid shook her head, stepping into the room. “I’d advise against that, princess. Foals aren’t supposed to take their diapers off, they could get hurt, or have an accident, and we certainly wouldn’t want either of those happening, would we?” Celestia stared incredulously at the maid.

“I am not a foal! Now remove me from this padding or you’ll be facing a severe punishment as well!” She demanded, stomping a hoof.

“Princess!” the maid countered. “If you are going to have a tantrum then I will have to put you in a time-out!”

“A tantrum?” Celestia said incredulously. “I am not having a tantrum!”

She slammed a hoof into the floor again, harder this time. “Now get this padding off me – NOW!”

“That's it!” the maid said sternly, horn glowing, and Celestia found herself lifted into the air by an aura of dark magic. She tried to fight against it, but for some reason she felt very tired out by the effort, and the maid dropped her into the crib.

In the general air of unreality about the whole experience, the fact the maid had both wings and a horn didn't even register on her.

“Now, Princess, stay in there,” the maid told her. “If you can wait until your time out is done, then you'll be able to talk again.”

Celestia was speechless – at first with anger. Then, accompanied by a growing blush, with the realization that she really had been having a tantrum.

But… but none of this made sense! She had a right to be angry – especially about this foalish garment around her flanks, which seemed to be so tightly secured that it was impossible to remove.

She began to spread her wings, then stopped at a warning cough from the maid. Folding them again, she looked around the inside of the crib and pushed a hoof into it experimentally.

It was, at least, very soft and comfortable. Almost like a cloud, though it was clearly fabric, and what's more there was a blanket of the same soft material with a sun-moon-and-stars pattern to it.

“All right, Princess,” the maid said, and lowered the side of the crib. “If you're going to be a polite foal, then you can come out again.

Celestia took the offer straight away, blushing about the whole situation, and tried a different tack.

“Why do you think I'm a foal?” she asked.

The maid seemed baffled by the question. “Because you are, Princess?”

“But-!” Celestia cut herself off, trying to keep herself calm in case the maid decided to punish her again. She took a breath, focusing. “That’s not an answer, you know because I am? You can’t just say something is something and expect it to be true.”

The maid smiled softly. “Dear, it’s complicated, I know a foal might have trouble understanding it. But if you must have proof, look around! You’re wearing a diaper, you’re sitting in a crib, you just threw a tantrum. Well, who else does something like that except a foal?” The maid concluded.

Celestia frowned, not at all satisfied by her answer. “But you’re not a foal! I could put you in a diaper and you still wouldn’t be one, so why do you insist that I am one?” The maid’s horn flared as she pinched Celestia’s cheek, giggling softly.

“Why my silly little Celly, it’s because you like your diapers, of course! Only a foal would enjoy the soft, fluffy, puffiness of a diaper! Only a foal would think their crib is comfy. It’s as clear as day that you are a silly little foal!” Celestia was about to retort when a worrying realization hit her. Despite her protests and her demands to have her room return to normal, she had found the crib cozy. And there was a sort of comfort to the way the diaper hugged her rear, keeping it warm and safe. Could she really be a foal?

She shook her head, trying to push the thoughts out of her mind. “But foals have pacifiers, don’t they? If I don’t have a pacifier, I can’t be a foal, right?” She said, trying to trick the maid into seeing things her way. To her dismay, the only response she received was having a pacifier shoved into her muzzle, the maid cooing softly.

“Mmph!” Celestia mumbled, then reached up with her magic to remove the pacifier. She hesitated, finding the feeling of it oddly comforting, then steeled herself and pulled it out with a quick burst of telekinesis.

“Silly Celly,” the maid chided. “Foals aren't allowed to take their pacis out!”

She pushed it right back in, and this time accompanied it with a flare of magic. Celestia tried to take it out a second time, but it didn't want to budge despite her best efforts – the only thing her telekinetic pull achieved being to make the pacifier move about in her mouth.

“Aww, see?” the mare cooed. “You like it! That just shows how much of a foal you are!”

“M not a foal,” Celestia said, speaking awkwardly around her pacifier. “Foals don't just wear diapers, or sit in cribs...”

“Well, I suppose one way to tell is that foals really like plushes,” the maid mused. “So, Celly, what's your favourite?”

Thinking she at last had a way to win the argument, Celestia pointed at Philomena's cage.

“Aww, see?” the maid said, nodding. “You are a foal!”

Celestia made a shocked noise, not at all sure what that could mean, and then the maid opened the cage and let Philomena out.

The phoenix emerged, but she didn't look quite like Celestia remembered her. Her red-orange plumage was soft and clothy, not sleek and feathered, and she had a large, puffy body which looked very squishable indeed.

Celestia raised her hooves automatically as Philomena swooped down, and found herself hugging a cutely-designed plush phoenix.

“Awww, you two were practically made for each other! Well, I know at least one of you was.” The maid giggled as the plush phoenix nuzzled Celestia, playfully nipping at her ears. Celestia gave a few suckles on her pacifier, instinctively squeezing the plush bird into her chest. The maid flapped her wings, which Celestia noted were now no longer bound beneath a frilly dress as she hovered up to an oversized mobile hanging above the crib. Giving it a spin, a soft music box tune began to play as the objects on each end of the mobile spun around.

Celestia tried to pull her gaze away from the mobile, but there was something hypnotic about how it spun, the cutie marks on the end glistening. Celestia kicked her legs as she saw Twilight’s pass by, not fully registering why her cutie mark was one of the designs. The maid leaned over the side of the crib, smiling sweetly down at Celestia as she squeezed her chubby phoenix plush. Reaching down, she poked a bit at Celestia’s padding, making it crinkle and puff out a bit of foal powder.

“Well, that’s another thing this little foal seems to like. The only thing left would be for her to use those diapers she has on. After all, no grown mare would ever even think about using those thick, fluffy, plump, pampers. But a silly little foal wouldn’t give it a second thought if they became wet and squishy. Then they’d get an even thicker pair once they’re all clean to keep their rump safe and snug~”

“W-well...” Celestia mumbled, trying to resist sucking on her pacifier for long enough to get the words out. “It's a… good fing that… I'm not gonna...”

Her words trailed off as she looked up at the mobile again, her gaze drawn to look at it as spun and twinkled around. The cutie marks looked pretty as they spun, each one making her feel content in a different way as it spun towards her.

“N-not gonna...” she began again, snuggling her plush for comfort, and yawned.

It was a little hard for her to concentrate, and then a lot harder. There seemed to be so much vying for her attention at once… the shiny cutie marks on the mobile, glittering and shimmering in sequence… the music, soft and lilting, making her sleepy and relaxed… the feel of the plush Philomena as it nuzzled her neck… the sensation of the pacifier in her mouth as she suckled it again and again… the comfy, plushy warm feeling of the diaper… and, right at the back of the list, the vague sense that she should be paying as much attention as possible to her bladder.

But that sense was quiet, and it was hard to focus on it as other things caught her attention one after another. The cutie marks on the mobile told her everything was fine… everything was in harmony… and she nodded, eyelids drooping a little bit. Then her head slumped forwards a little before she blinked and shook herself awake again.

“Aww… looks like little Celly is tired,” the maid cooed. “That's okay. Foals are easily tuckered out, you know.”

“But… not a foal,” Celestia claimed, yawning again but not taking her gaze off the mobile. It looked so nice…

She relaxed, as the mobile told her to relax and she agreed with it. Her legs relaxed, and her breathing slowed down a little.

Then she relaxed somewhere else, and felt all warm and damp all of a sudden.

Her padding swelled outwards, growing warm and squishy as Celestia soaked it. Part of her whined and whimpered, looking down at her wet diaper as it puffed up a little more. But she wasn’t quite sure why she was so upset. After all, the maid did say that foals do wet their diapers. And if she wet her diaper, maybe she was a foal after all. That didn’t make Celestia like the dampness of her padding any more, though, as she wiggled about, fussing a bit in her padding.

“Aw, poor widdle baby Celly’s all wet.” Celestia looked up to see Nightmare Moon standing at the edge of her crib, lifting her out with her magic. She fussed a bit more, something telling her that Nightmare wasn’t a very friendly pony and Celly had to get away! But that voice was quickly softened when Nightmare lay Celestia down onto the changing table. She began to quickly remove the damp padding, wiping Celly clean as she pulled out a thick, puffy, sun-emblazoned diaper out of the dresser. Celly giggled as she saw just how big the diaper was, and imagined how comfy cozy it would be around her rump.

She didn’t have to imagine for very long, as Nightmare lifted Celestia’s rear up to slide the diaper underneath, puffing several large clouds of foal powder onto her rear as she tugged her tail through the appropriate hole. Celestia squeezed Philomena as the padding was folded up over her, hugging her rear comfortably as Nightmare lifted her up once again. “There, there, such a good little foal you are.~” Nightmare pressed a hoof into Celly’s muzzle, making her giggle as she was hovered back over to her crib. Or rather, where her crib had been. In its place stood an oversized plush sun, just waiting to be squeezed and snuggled.

“Nap time,” Nightmare said, letting the mobile keep going. “Just watch the pretty mobile for a moment, Celly...”

Celestia nodded a bit dozily, yawning, and watched the mobile go around and around again.

Now she looked at it again, she could see extra symbols on it. Some more cutie marks, like a wand-and-sparkles or a starburst with two little green wisps next to it. Other symbols entirely, like a griffin's feather and a purple flame.

And one in the middle, a silver moon, with a free slot next to it.

All the symbols and cutie marks shone and glittered, drawing Celestia's attention in succession, and the music kept her unfocused and dazed as she suckled her pacifier.

As she did, there was a zrrrip sound as Nightmare pulled along a zipper, opening out the plush sun along the outside of the central circle. The little prominences split up, half of them going on each one of the two sides, and Celestia muzzily noticed that the plushy sun was made of very thick, soft-looking material.

She yawned, and Nightmare booped her muzzle again. “Sssh...” the Nightmare-Mare told her, in a soft voice. “Just wait a moment...”

Nightmare fussed about with the sun a bit more, plumping it up and making sure it was all soft and well-cared for, then spread it out and lifted Celestia towards it.

The alicorn frowned momentarily, confused, then decided it was probably okay. Nightmare laid her down on the soft, sinfully comfortable plush, and shifted her a little to make sure she was in the middle of the circle.

“Sleep tight,” Nightmare told her, and started to zip the sun back up – the soft, cushy yellow material folding around Celestia a bit at a time. “It's time for the sun to go to bed...”

Celestia nodded drowsily, eyes still on the mobile as it shimmered and spun.

For a moment, she felt sad that she wouldn't be able to watch the mobile while she was asleep, then calmed down as she realized she'd still be able to hear it. To hear that lovely, melodic music made up of nearly a dozen different kinds of tune – all of them sleepy, and relaxing, and just right for a foal like her to listen to.

Nightmare zipped up the sun completely, leaving Celly trapped inside its impossibly cozy and snug confines, snuggling her plush as she suckled her pacifier and wiggled her padded tush. Nightmare grinned as the sun poofed away, only to appear on the mobile a moment later, the sun princess kept secure in her new puffy prison. Chuckling, Nightmare stared at the mobile a while longer, thinking of all the wonderfully snug traps she had devised for the ponies.

As she stared, though, she couldn’t help but think that the mobile could be a little bit bigger…~

Author's Note

And that's the end of the story!
Though there's a sequel, too, which will either be posted in this same story or as a separate one.