“Phew,” Twilight said to herself, exhaling a little. “That was entirely too much trouble from one book. I hope you've learned your lesson, Rarity.”

“You're right, Twilight,” Rarity admitted. “That was foolish of me.”

Twilight dropped the Inspiration Manifestation book into a bag, then sealed the bag. “Spike, take a letter please. Dear Princess...”

Spike scrambled to follow her instructions.

A few hours later in Canterlot, Princess Luna lowered herself back to the floor of her balcony – moon raised, it was now time for her other duties.

Before she could get ready, however, there was a knock on the door.

“Princess?”

“We are here,” Luna answered. “Enter!”

The door creaked open, and a Night Guard pegasus trotted in with a bag in his mouth.

The guard who followed him, a Day Guard unicorn, rolled her eyes. “I told you, I could carry it.”

“Mmff,” the pegasus mumbled, then put down the bag. “Princess, this bag arrived a few hours ago in the postal section. It requires a Princess to look over it, and with Princess Celestia on holiday we thought it would be best to wait until you were awake.”

“Good thoughts, both of you,” Luna agreed, taking the bag and scanning over the letter. “A book? How interesting… and from Twilight Sparkle, as well!”

She nodded to the guards. “Thank you both. You may go.”

As they left, arguing in low voices over the proper division of duties, Luna opened the book.

“It is still remarkable to see how many books have been written in the last thousand years,” she said to herself. “Perhaps there is an hour or two before I must travel the dreams of Our ponies...”

It was a rather strange book, despite the cover looking practically untouched, the writing within was something she had not seen since before being sealed away as Nightmare Moon. Luna pushed the thought out of her mind, trying not to dwell on the uncomfortable memories as her eyes scanned the pages.

Whatever this book was, it quickly became clear it wasn't some sort of story Twilight had simply wanted to share. The tomb spoke of intricate magical techniques, of ways to strengthen spells and conjure up whatever it was that crossed the reader's mind. As Luna flipped through the pages, her vision grew a little hazy, a soft emerald tint coating everything. She shook her head, rubbing her eyes to rid herself of the effect. Surely she couldn't be that tired, it had hardly been a week since she had taken over Celestia's extra duties.

Luna trotted over to her bed, starting to slow in her reading, focusing on what information the text actually contained. Perhaps this was a spell Twilight had been attempting to develop? That would make the most sense, considering the weight of the volume and how in depth it went. Twilight was always one to document everything she did, no matter how irrelevant it might have been. Sitting on her bed, Luna began to read the novel, not noticing as the emerald haze seemed to return…

After more than an hour of reading, Luna was most of the way through the book, and she fought down a yawn.

Maybe it was time for her to return to her slumber – court had obviously tired her more than she had been anticipating. But since there were only a few dozen pages left, she decided it would be best to finish them.

Still reading, book suspended in a field of her own noctilucent magic, she unlatched her peytral and the rest of her regalia. A moment's work ensured that the guards would know she was slumbering, and she got into bed with another yawn.

That emerald haze was stronger, now, but Luna wrote it off as an effect of her tired state. Closing the last page of the book, she blinked a few times and lay down on the pillow.

Part of her mind was contemplating the techniques and spells she'd read – spells which were so subtle and precise that they required hardly any concentration once one knew the trick. That was probably required, simply in order to avoid the user being distracted, but still – there were plenty of possible implications for the field of enchantment.

And, of course, the ability to cause anything you could think of to form from thin air. Twilight Sparkle had truly proved her skill once more, for all that by alicorn standards she was a mere… filly…

Luna's eyes fluttered closed, and after no more than a few seconds she drifted off to sleep.

Luna's subconscious drifted through the dream worlds, her mind still full of the book, her thoughts of Twilight, and of Nightmare Moon. Floating through the starry ether of her mind. Her hooves suddenly felt ground as she opened her eyes within her dream to find herself standing within the walls of the castle she and Celestia had ruled from in the Everfree forest. Curious, Luna took a few steps through the grand hall, wondering what she was doing back here. She hadn't even given thought to the old castle, let alone dream about it in years. Luna shook her head, her horn alighting as she prepared to leave. Whatever the reason, she really shouldn't dwell on it. She had to patrol her citizen's dreams before she could indulge in her own.

Her horn immediately fizzled out as she heard a faint chuckle echoing through the halls, however. Luna froze as the echoes bounced around her, sounding so familiar, but Luna refusing to believe they belonged to who she suspected. Carefully stepping back, Luna attempted to conjure up the spell again, only for the chuckling to return. Luna shifted in her bed as she looked about in her dream, her heart starting to pick up its pace.

"My my my, what a naughty little foal we have, running around without anypony? Are you lost, little filly?" The voice returned. Luna gulped, trying to spot the source of the taunting as a pool of dark stars began to flow in through cracks in the old stone walls.

The very word “filly” brought her thoughts back to her characterization of Twilight as a filly by alicorn standards, and Luna's mind ran off in another direction at the same time as she backed against a pillar – looking for the voice, as it continued taunting.

“Oh, dear...” the voice said, faux-caring. “It looks like you are lost. That's not a door, filly!”

“I know it's not!” Luna replied, stung into replying. “And – I am no filly! I am Luna, Princess of the Night!”

“Really?” the voice asked. “Because you look like a filly to me.”

Luna reached the pillar, and rather than hard stone against her fur she felt a soft pressure on her rump. Startled, she looked back – and saw something crinkly and thick wrapped around her flanks, a dark blue to nearly match her coat.

It was obvious what it was from the moment she looked at it.

“A d-diaper!?” she asked, shocked, then turned back as the strange voice chuckled again.

Starlight shimmered in a pool on the flagstones in front of her, and Luna realized what it must be.

“Nightmare Moon?” she said. “But – but you're-”

She stopped, shaking her head. “It's just a dream. A very odd dream, but a dream. I have to remember-”

“Just a dream?” Nightmare asked, suddenly right there – her mane and tail still glittering clouds of stars and nebulae, but the rest of her solid and haughty and taller than Luna. “Perhaps… but not a pleasant dream, little filly. After all, I've always been… a nightmare...”

Luna's thoughts ran wild, imagining the trouble Nightmare Moon could cause if she really was self-aware and returned inside a dream. She could cause all kinds of problems – work through her defences in ways she'd never even considered-

-and then the Princess remembered the book she'd been reading before going to bed.

A book about a subtle magic which brought imagination into reality. And she'd just imagined a Nightmare Moon far harder to stop than the original.

Nightmare Moon laughed again as she seemed to tower over Luna, growing larger as she did. "My my my, what an overactive imagination this little filly has! Princess of the night, being visited by 'just a dream'? That's quite amusing." Nightmare grinned, taking a few steps towards the cornered Luna. Luna whimpered, chastising herself for what she had done. Stupid, foalish thing to do, just like a filly would! She gulped, Nightmare smirking as she approached the princess. "Besides, even the princess of the night can be a filly. Why, I remember when she threw quite the temper tantrum, whining about why she wasn't the best sister, why did everypony love the day so much and hate her night?" Nightmare grew a bit larger, almost too big to fit through the great oak doors of the castle now.

Luna couldn't help but blush with embarrassment. Despite how much she wanted to deny it, Nightmare was right, she had acted like a spoiled little filly. "Th-that was years ago! I'm a grown mare!" She shouted back, trying to regain her confidence. Unfortunately, her mind was already awash with pictures of her as a young filly, and the diaper that had somehow materialized around her flanks was doing nothing to help stop these fantasies as she shrank in front of Nightmare.

“A grown mare?” Nightmare Moon asked, sounding shocked. “But grown mares don't wear thick, puffy diapers. Grown mares aren't nearly so small. And grown mares certainly don't like their diapers!”

“I don't like my diapers!” Luna said quickly, then blushed as she heard herself – sounding like a petulant filly, complaining to an adult. The idea seemed to stay stuck in her head, despite how much she tried to think about something else. Anything else.

“Stop it!” Luna demanded, stamping a hoof on the floor. “Or… or...”

She couldn't come up with anything she could do to fulfil her threat, but she could think of things Nightmare Moon could do to repay her for her bratty behaviour.

“Now, now,” the Nightmare said, almost as soon as she'd come up with the idea. “Good fillies don't have tantrums like that, and grown up mares certainly don't. So you can't be a grown-up at all.”

Luna tried to squeeze herself against the pillar, ignoring her puffy rump, but her hooves slipped on the stone floor and she fell on her backside – her crinkly, padded backside – as her booties failed to gain any purchase. She blushed, realizing that Nightmare had just fulfilled another of her speculations, then shook her head and tried to force herself to think about something else.

“Just imagine,” Nightmare said, chuckling, and looming over Luna. “If this is a dream, and I'm so much bigger and more mature than a little filly like you… maybe that means you want me to be in charge?”

Luna shook her head, placing her mitted hooves over her ears in an attempt to block out Nightmare's suggestions. Of course, this did nothing to stop her mind conjuring up images of Nightmare doting over her, tucking her into a crib or feeding her warm bottles of milk. She whimpered, kicking her legs as she suddenly felt Nightmare's magic surround her, lifting her up into the air. "There, there, we need to get this fussy little filly off to bed again, I think." Luna squirmed in Nightmare's magic, trying desperately to free herself, but doing nothing but making her padding crinkle with each little movement. Luna was about to complain when a pacifier was stuffed into her mouth, Nightmare shushing her. "Hush, now, you shouldn't talk back to your caretaker little filly." Luna's blush brightened as she suckled instinctively on her pacifier. She reached up to try and tug it free, but no matter how hard she squeezed, her booties could not get a grip on it.

Luna felt something soft below her pressing up into her diaper, and she suddenly realized she was being lowered into an oversized crib, one made big enough to make her feel even more like a little filly. Nightmare's magic faded around her, but before Luna could try and sit up, she was practically buried in thick, fluffy covers, wrapping her up tightly and snugly. "There, now isn't that better? Don't you feel so warm and safe in your diapers?" Nightmare asked, Luna's head falling back on an overstuffed pillow.

Luna kicked her legs, feeling her diaper shift about, rubbing gingerly between her haunches. Her blush grew even brighter as they did, her mind suddenly imagining them thicker... and softer... and tinglier... Her eyes went wide as her padding grew to match, starting to slowly shift ever so slightly to rub and tease Luna as Nightmare grinned down at her.

“See?” Nightmare asked, chuckling. “Doesn't wittle Woona love her didees really?”

Luna squeaked in sheer embarrassment, squirming to try and get out of the situation she was in – but at the same time wanting nothing more than for the pressure and teasing to continue, indeed to increase. She imagined it getting stronger, imagined Nightmare using her vulnerability to tease her into total submission, and she knew that that was exactly what was going to happen.

And she couldn't work out what to do about it. She couldn't manage to even imagine a way to escape, her mind too caught up in fantasies and teasing.

“Why...” Nightmare went on, musing out loud as Luna's diaper puffed up a little more, growing to the point it would be difficult for her to stand up. “Whenever I suggest something blushy, teasing… embarrassing… you think of it, and it comes true! It's almost like I have this power rather than you, isn't it?”

Luna recognized the trap at the same moment she fell for it.

There was a slight tremor in the dream, as control dropped from her grasp and fell to Nightmare.

Out in the real world, Luna's magic – locked into the pattern of the Inspiration Manifestation – began to change her, reflecting the mental conflict in her dreams.

A night-black diaper formed around her rump, thick and puffy and emblazoned with the Nightmare's cutie mark.

Then it began to grow, slowly and inexorably, as Luna shifted in her dreams.

"Why, I can do just about anything I wished, couldn't I?" Nightmare asked, snickering as she knew Luna was forced to oblige. "I could make those pampers even thicker! I could keep you stuffed safely in that crib all night with nothing but diapers around~" She laughed, watching as beneath the blankets Luna's padding swelled even further, the large pillow her head lay on puffing into a thick diaper with a cloud of foal powder. Nightmare laughed as these changes took place, the real Luna squirming and kicking in her bed as the black diaper started to swell past her knees, spreading her legs wider and wider as they did. "Oh my, I don't think I remember having this much fun in quite a long while!" Nightmare grinned, poking Luna's diaper, the padding starting to swell in spurts, squeezing tightly down on Luna with every puff. She watched as her little filly wriggled and writhed in pleasure, trying desperately to free herself, but her mind doing nothing but conjuring up new ways for Nightmare to tease her.

In reality, Luna's Nightmare padding began to creep up her belly, her tail starting to wrap itself up in crinkly material to match Nightmare's ethereal one. She whimpered, a hoof coming down to press on the front of her padding as she dreamed.

"Oh, but as much fun as teasing you endlessly would be, I must admit, you seem to have a rather one track mind, wittle Woona." Nightmare winked, Luna blushing as Nightmare puffed up a bit, starting to grow soft and crinkly as she did. "I wonder what everypony else would think if they were to see their princess as nothing but a little blushy filly, too wrapped up in diapers to do a thing. But who to show off too...?" Nightmare mused.

Luna wiggled about, the diaper now starting to engulf the tips of her hind hooves, swelling and massaging her as it puffed and puffed, lifting her rear up off of her bed. Her mind, no matter how much she pleaded for it not to, jumped to Twilight and the book she had shared. Nightmare grinned, shaking her crinkle-fying rump excitedly. "OOoh, Twilight is just the pony to help out! What a smart little foal she'll be, I'm sure she'll know all sorts of wonderful ways to tease!"

“What!?” Luna gasped. “N-no!”

The very idea of being in this state in front of a fellow Princess – especially so soon after thinking of Twilight as the 'mere filly' – was mortifying, and she shook her head as hard as she could. The only result of that was just a series of crinkles, from the diapers surrounding Luna both around her body and under it – and, in the real world, a slow advance of the material engulfing her to the base of her forelegs.

“The more you say no, the more I think yes~,” Nightmare chuckled, her body becoming crinkly in earnest. “But – oh! Silly me, I forgot to think about how to take the foal to see Twilight!”

Luna instantly thought about five different possibilities, each more humiliating than the last, and Nightmare smirked.

“Perhaps I need a nice, cushy-padded stroller, for wittle Woona,” Nightmare mused, as one formed by the crib. “Absorbent enough to catch any leaks, too! A nice bottle to keep her quiet as we go to visit, and she'll be quiet as a mouse… including a lot of squeaking, of course~”

Luna tried to use her magic, but of course that didn't work either in a dream like this – and the attempt just made Nightmare chuckle.

“Oh, or perhaps it'd be better to just keep her safe in the most soft, padded place possible,” Nightmare added, yawning pointedly to emphasize the soft material now making up her insides. “Wouldn't that be nice?”

Back outside the dream, the crinkly material of the Nightmare-diaper engulfed Luna's forelegs. It crept up her neck, covering her completely in crinkly material, until only her muzzle was clear of the combination diaper-costume-prison forming a thick, comfy suit around her.

Luna's eyes widened, terrified at the thought. And yet, the back of her mind couldn't help but push that idea into further focus. Imagining the feeling of the plush, crinkly material Nightmare was made of surrounding her, squeezing in and massaging her just as her diaper was, keeping her safe and snug, without any hope of escape. Nightmare grinned, flashing her teeth upon reading Luna's mind. "I think it's settled, then." Her horn flared as her magic surrounded Luna, lifting her up into the air. Nightmare licked her lips, still grinning widely as Luna wiggled in her impossibly thick padding. The diaper in reality was slowly, slowly creeping up her muzzle, almost trapping her entirely as Nightmare opened her mouth wide, hovering Luna closer. Then, with a swift gulp! Nightmare dropped Luna into her mouth, swallowing her down. Luna wriggled as she slid further and further, the soft, plush insides of Nightmare rubbing her in all the worst tantalizing ways. Then, at the same time her real body was engulfed in the suit, she landed with a flump in Nightmare's belly. She could feel Nightmare rubbing her stomach contentedly, her laughter echoing all around as the walls pushed and squeezed and caressed Luna gingerly. "Oh, my little filly, I think I'm going to love seeing what your friends come up with tonight..." Nightmare chuckled, her horn creating a portal out of Luna's dream as the suited pony wiggled and squirmed in her new plush, crinkly jail.

Twilight was happily trotting through Ponyville, the warm sun shining down through the cloudless sky. It couldn't have been a better day, she thought. A delicious pancake breakfast from Spike, the perfect weather, and, best of all, Cheerilee had requested she come to class to assist in teaching for the day! It felt so rare that she got to share her knowledge with anypony that would listen, and she was sure the fillies and colts of the schoolhouse would be much better listeners than Rainbow Dash was the last time she tried explaining long distance teleportation spells. It seemed as if she had just left her castle, but soon she was stepping up to the door of the schoolhouse, lecture diagrams and aids all stuffed into her saddlebags tucked under her wings.

She knocked at the door, which opened to reveal Cheerilee standing before her. "Good morning, Cheerilee! I hope the kids are ready for-"

"Twilight, there you are! The test is about to start, I was worried you'd miss it. You're never usually this tardy!"

Twilight blinked, a strange fear flashing through her. “Test?” she asked. “I thought it was going to be a lecture. I didn't bring any test materials-”

“I should hope not!” Cheerilee agreed. “But you'd better leave your notes outside anyway, it'd be cheating for you to take them into the test. Come on!”

Twilight realized her terrible suspicion had to be correct. A test – one she had to do, and one she hadn't even studied for!

All sorts of questions about why this was going on, or when she should have heard about it, fled her mind. All she was concerned about was the dreadfully familiar scenario she'd worried about for years.

Mutely, she followed Cheerilee into the classroom, and took the one free seat. It and the desk were both much bigger than the rest, but that made perfect sense.

“All right, class,” Cheerilee said. “You can turn over your papers… now.”

Twilight did so, and began looking over the paper for a hint about what kind of exam this was. The first question was about literary metatheory, and she felt her ears go down and her wings fluff out in dismay.

Answering it as best she could – and with a constant drumming of didn't revise didn't revise didn't revise in the back of her mind – she moved on to the next, and the next, her worry rising as she did so.

'Conjugate the surrealism of the underlying metaphor'.

'Explain, in your own words, why.'

Twilight glanced up surreptitiously, and saw all the others were writing busily. It looked like she was the only one having trouble!

'Write down the fifteen reasons why good financial-'

Twilight blinked, distracted, then looked down at the page again.

'Write down the fifteen reasons why good fillies wear diapers.'

Her mind froze as she stared down at the question. What? What kind of question was this? Was this some sort of reference to a book she hadn't read for class too? She dipped her quill in some ink, scribbling down a few answers. 'They're cute... they're comfy... they keep them safe...' She nervously chewed on the end of her quill, wracking her brains to think of more reasons. Why on earth would Cheerilee need fifteen reasons? Wouldn't five have been enough? Twilight shook her head, flipping a page on the packet (which she was sure had only been a few pieces of paper earlier) to move on. She couldn't spend too long on one silly question. Get the ones she knows first, get the harder ones later. That's what Celestia always taught her. 'Introspections are what form of word?'

'Reneigh Descartes would likely agree with which of the following statements?'

'If a filly is not currently wearing a diaper, what is the best course of action to take?'

Twilight gulped, staring at the test in desperation. Her mind suddenly made a small click, looking back to the previous question. If good fillies wear diapers... and a filly isn't wearing diaper, and assuming all fillies should be good fillies... then the best course of action would be to put the filly in a diaper!

Twilight grinned a little, always a little happy when she found answers within questions, quickly scribbling down a response. She shifted in her seat, not noticing as a white diaper puffed up under her flanks, lifting her off the seat slightly as it wrapped itself around her rear, instead Twilight moving on to the mathematics portion of the test…

The first question involved a long, long, long equation. It made Twilight go cross-eyed just looking at it, and after a moment she wondered if the equation itself was so long it was starting to escape the paper.

Trying not to think about that, she skipped that one for now, and did a few more conventional maths questions. One about long division, which was fairly easy, then one about differentiation which was quite a lot harder.

The contrast didn't seem surprising, and Twilight just moved on after that to the following question.

'One diaper plus three diapers is?'

Twilight thought carefully, making sure there wasn't a trick to the question, then wrote down the answer. Four diapers, of course.

She shifted a little, reacting to something under her flanks without consciously noticing it, and went on to the next question.

The desk seemed a little lower than she remembered it…

Remembering that it was important to take a break if you needed one, Twilight glanced out the window. She spotted a moon hanging low in the sky, which looked vaguely odd, but she didn't think it worthy of much attention.

Going back to her test, she answered the next question – a complicated bit of integration – then moved to a multiplication question.

'four diapers times 1.5 is how many?'

The answer was obvious, of course. Six diapers.

Twilight shifted again, noticing how comfy the seat was, and then decided to turn her attention back to that big equation question – one which seemed only to have become longer since she last looked. It was longer than the page itself, and some of the symbols were falling off and bouncing off the floor.

Scratching her head, Twilight attempted to find ways to simplify the equation. There were a few numbers here, and here she could combine, and by the transitive property she could... she poked at some of the numbers, actually dragging them around on the page as she worked her way through. Solving this equation would have been much easier if it wasn't for the fact that some of the numbers and figures began to slip off the paper, making soft crinkly sounds as they fell to the floor. As she followed the path of one of the numbers, she noticed another equation she seemed to have skipped. She chastised herself a little for managing to miss such an obvious question. 'Six diapers squared is how many diapers?' Exponentials, this math test was certainly testing a range of abilities, Twilight mused. Still, it wasn't particularly hard. 36 diapers, of course. Twilight leaned forward over her test, not paying much mind to how her thick diaper was now pushing into the back of her seat, bulging out over the top as her tail swished across it nervously. Returning to the large equation, she noticed even more numbers and letters had fallen free, now starting to swell up to the size of a balloon you might find at a party. Twilight tried to collect some of them back up, squeezing the crinkly figures as she leaned over them, trying to remember where they all fit back into the equation. Pushing aside an 8, she shifted in place, her legs spread wide by the padding resting between them.

"Ten minutes, everypony!" Cheerilee called out. Twilight's stomach clenched. Ten minutes? How much time had she spent on this equation? She flipped through the novel of a test, trying to see what she had left to answer as the numbers continued to swell around her. Twilight attempted to lean back into her chair as she picked up the test, only to fall and land with a puff onto a swelling 0, her padding fitting neatly into the hole in its center. 'Ok, ok, calm down, Twilight. Go to science, you can do that!'

'Puffmium (an element associated with spontaneous growth) as 7 valence electrons while Crinklicon (an element commonly found in thick diapers) has 1. How easily would these two elements bind to form a covalent bond?'

“Um, uh...” Twilight began. “Wait-”

“Twilight!” Cheerilee said sternly. “Please do not disturb the others taking this test!”

The alicorn in question winced, shifting in her seat, and ignored the crinkling sound her diapers produced as she did. Blushing, she put her head down and went back to the question.

This isn't right! She thought to herself. The question didn't have enough information – she didn't know if the elements were in the octet bond section of the table or the duodectet section of the table. Without that she couldn't answer the question…

...unless she gave both answers! She'd have to show her working.

Depending on the bond type of the elements, either one of each would bond very easily- she shifted again, wondering why she was so high off the floor – or a single Puffmium atom would bond best with five Crinklicon atoms. In the latter case the resulting diaper stack would be extremely thick and hard to move in.

She looked over her answer again, deciding it was good and made complete sense, then dropped her pen over the size of the table. It vanished into the pile of numbers, and Twilight was about to raise her hoof to ask for another pen when Cheerliee called out again. “Time!”

Twilight's eyes widened, then she groaned. How had she run out of time?

She closed the test paper, noticing the dozens of questions she'd not even reached, and sank back into the pile of puffy balloon-y equation all around her.

A few seconds later, Cheerilee was at her desk and flipping through the test paper. “Oh, dear, Twilight...” the teacher sighed. “It looks like you'll have to go back to-”

Twilight gasped.

“-Magic Kindergarten!”

"Aaaaaaaaaaaaaah!!!" Twilight sat up in bed, screaming loudly. "No! I swear I can do better! Let me retake!" She shrieked. Upon realizing she was sitting in her bed, Twilight's panting slowed, her muzzle scrunching as a blush crossed her face. She glanced down at Spike, who was curled up in is small bed, still asleep. Twilight let out a sigh of relief. At least she didn't have to explain what she was screaming about to anypony. Twilight fell back into her bed, rolling over to try and go back to sleep. Her drowsy mind didn't even notice as she snuggled into a puffy number 6, pushing a thick diaper with "A+ Filly" printed on it into the crinkly numeral before falling back into dreamland.

Pinkie Pie was eagerly zipping around Sugarcube corner, tossing confetti all over the shop's floor as she giggled. She was so excited! She's getting to plan the biggest, bounciest, funnest, most silliest party she'd ever done before! All for the Mayor's 276th anniversary of Ponyville! She had balloons and party games and decorations galore! Pin the tail on the Cranky, dunk tanks, acrobatics and juggling, the whole whiz-shebang! Oooh, but what to make this party extra extra special? After all, this wasn't any 27*5th* anniversary! It needed to be super duper loopy looper fun!

The Pink Party Pony picked up a recipe book, then gasped.

She closed it, closed her eyes, flipped to a different page, and opened it again.

Then she giggled. “Great! It's a dream! And that means this can be super-elaborate-aroonie!”

Pinkie paused, and put a hoof to her muzzle. “But maybe that means it doesn't count? Hmmm...”

She put another hoof to her muzzle. “But that just means it can be a great practice run for a real super-awesome party!”

Taking both hooves off her muzzle and putting them back on the floor, she began to ponder. “Hmmm… so because it's a dream, that means there can be anything I think of! I can make it so there's huge balloons, way bigger than anypony would let me try out in a real party! Oh, and I can taste-test the MMMM, and a chocolate-caramel-cranberry cake that I can call the CCCC!”

Full of ideas, Pinkie started by making the room much bigger. Then she dreamed up a huge pile of packing peanuts, and spent a few minutes swimming around in them before jumping out and brushing them off.

That done, she imagined a whole packet of really big balloons. No, bigger than that.

“All right!” she announced. “Let's see how big this balloonie really is! Or, well, how big I'm going to dream it is!”

Giggling again, Pinkie opened up the pack of balloons, reaching her hoof down to pull out a bit of rubber only a bit larger than her head. "Awwww, is that all my silly dreamy mind can come up with? I better have some sort of trick up my sleeve, or I'm really going to disappoint myself!" Pinkie wandered over to the closet, rolling out a large tank of helium into the center of the room. "Alright, Pinkie-brain, do your magic!" She slipped the end of the balloon around the nozzle of the tank and twisted it open.

The deep blue balloon emblazoned with stars and moons began to slowly swell, stretching bigger and bigger. Pinkie poked the balloon as it grew, grinning as she noticed how much give it still had. She knew she shouldn't have doubted herself! It stretched larger and larger, soon as big as the party pony herself! Pinkie bounced her rear against the balloon playfully, looking around at the rest of the room. "Oooh, I should get some streamers set up before this big bouncy balloon gets too big for the room!" She laughed, bouncing back to the cupboard, tossing several party supplies including poppers, rubber chickens, and cartoony glasses aside before returning with a hoofful of rolls of streamers. Humming to herself, Pinkie began to throw the rolls around the room, streamers flying from the end as the balloon continued to stretch and swell. Pinkie would occasionally bump into it, not monitoring how quickly it was growing as she decorated.

"Heehee, stop it Mr. Balloony, I'm not done yet!" Pinkie chuckled as she bounced up against the balloon as it began to fill the room further, pushing chairs up into the wall and removing the room Pinkie had to move around without bouncing into its squeaky surface.

Pinkie gave the balloon a playful push back, but that only seemed to encourage it – odd as that sounded – with the rubbery material suddenly balloon-ing out much faster and pinning her against the wall.

The Party Pony shoved against it, grinning. “H-hey! I'm not that sort of pony, mister!”

Then there was a sudden squeeeak noise, and the surface of the balloon seemed to extend along the wall and come in around behind her. For a moment, she was completely surrounded, and then the material retreated so that her upper half was free.

The rest of her, however, was all but lost inside the balloon. Only her rear hooves stuck out, at odd angles, and Pinkie pressed into the surface with her forehoof to feel the tension. That made it produce a squeaky hiss, and it deflated until it was merely so large that she was halfway to the ceiling.

With the sudden loss of pressure, and the air blowing all over the place, the streamers she'd put up started to flick in all directions. Most of the time they just bounced off the wall, but the ones which ran into her got all tangled up – and before Pinkie had time to blink, she was covered in streamers.

The whole situation was one she could appreciate – it was perfectly slapstick! She applauded, but that just got her more tangled up.

“Uh… maybe I'll have to be the dance floor...” she said, giggling at the thought of other ponies bouncing around on the balloon she was half-stuck in.

Pinkie bounced in the balloon, squeaks and squirks filling the room as the streamers rebounded off of the rubbery material to tie her up. A few streamers even managed to slip down between the balloon and wall, tying it tighter into herself as it slowly puffed and deflated, massaging her tenderly as Pinkie wiggled in the confines of the party supplies. Heehee, well, she was sure this would be a party to remember at least! Dancing on the balloon, lots of games and treats and- Pinkie's ears perked up. The treats! How could she forget tasting all the different flavors to see which ones she'd use for the party? Tugging fruitlessly on her bindings, Pinkie tried to free herself from the balloon, but only succeeded in sinking a bit further in as it puffed up around her.

"Let me go, you big balloon! I can't sample sweets like this!" She proclaimed. But even as she did, she felt something poking into her cheek. Turning her head to face it, she had a fleeting glimpse of a slice of cheesecake before it was shoved into her mouth by some unknown force. "Mmmmmm!~" Pinkie moaned, slumping down in the balloon a bit as she savored the flavor. "Oooh, what was that? I need to get that recipe down for when I wake up!"

Almost as soon as she finished her sentence, another treat blurred towards her – this time, a chocolate torsade with extra vanilla flavouring.

Pinkie chewed on it, and just managed to swallow the delicious pastry down before a raspberry torte replaced it.

Then there was a circular ring-shaped biscuit with hardened icing on the top. Then an apple, which was surprising enough that she blinked, before it was replaced quickly by a much sweeter slice of orange-peel cake.

Pinkie quickly lost count of all the sweet things being presented to her, as she bounced up and down in her balloon of a seat and her streamer-y bindings. It seemed to be coming just slowly enough that she could manage to get each one down, but when she tried to chew more slowly it just stuffed the next treat in too soon and got crumbs everywhere.

The Party Pony could feel herself getting fuller and fuller – overfull, stuffed with good party treats and sweets – and she groaned, feeling delightfully plump but knowing that it would do terrible things to her waistline.

But it was a dream – her dream! So if she wanted to be tied down, stuffed in a balloon diaper and made to eat everything on the menu twice… who was she to argue?

Wait, diaper?

“I didn't realize that's what I was going for!” Pinkie announced, in a brief lull.

Another sweet stuffed itself into her muzzle, muffling any further comments she might have had on the strangeness of her dream. But, Pinkie didn't really care too much. She had to admit, the diaper balloon was quite comfortable, especially how she sank further and further into it as her waist ballooned out with each smackeral of dessert. Occasionally she would bounce atop the balloon, feeling it surge out with a hiss, lifting her back up into the air to keep from being fully swallowed up by its rubbery grip, letting her gobble up more and more sweet treats. Pinkie would have reached up to rub her belly had her hooves not been tied to her side, but feeling her warm pudge push against the bindings wasn't half bad either.

"Mmmfff, I wonder- mmpphhh, if anypony else wouldn't mind a par- gulp -ty like this?" She mused to herself. Still, whatever silly part of her had decided to come up with this idea, she had to let it take control of her dreams more often, Pinkie thought as she leaned back into the balloon diaper, sinking in as she let herself be stuffed until she was the proper size of the padding... which only kept growing to make sure she never quite was.

At about the same time, a bush rustled outside Trottingham.

Gilda the Griffin chuckled to herself. Sure, this was a bit mean, but it was going to be pretty funny – all she had to do was to get somepony or other to accept the flowers in her bag.

This far from the Everfree Forest, nopony would recognize Poison Joke for what it really was. Based on what Dash had said about it in the past, it'd be good for a funny but ultimately harmless joke.

She'd got the antidote in her other bag. She wasn't a monster-

Gilda looked up at the sound of a pony walking down the path, then slid backwards a little so she was behind the bush.

When the pony's hooves were nearly up to where she was, she came out from behind her hiding-place. “Hello, there.”

“Oh – hello,” the pony answered, a unicorn filly wearing a saddlecloth. Her eyes were an odd bright blue, and her coat was very black, but Gilda didn't really pay much attention. “Who are you?”

“I'm Gilda,” the Griffin introduced herself. “And I was just looking for somepony like you – you see, I've got a lovely bunch of flowers in my bag which I was told to deliver, but the pony who was supposed to take them didn't want them!”

The filly looked puzzled.

“I was wondering if you'd be able to take them,” Gilda went on, opening her bag with a shrug and revealing the blue flowers.

The filly stared in at the flowers that almost seemed to glow in the night air. Her horn lit up as she carefully levitated out the bouquet, Gilda trying to keep an innocent smile on her face. "You might wanna give them a sniff. Just to make sure you like the smell, y'know." She suggested.

The filly nodded, pulling the flowers close to her nose. She took a biiiig whiff... then suddenly blew into the flowers, scattering the pollen up into Gilda's face. "Gah, what the heck?!"

"You meanie! Trying to trick a harmless little filly!" The pony cried. Gilda rubbed her eyes as she started to take a few huffs, feeling a sneeze building. "Only a little chick tries to do that!" The filly smirked. Gilda took a few more breaths before suddenly sneezing. And as she did, a thick blue diaper puffed around her rear in a cloud of poison joke pollen. Gilda's eyes widened as she looked over her shoulder at the thick garment, the cloud of pollen only making things worse. She tried to fight back another sneeze, covering her beak as she did. Her padding fluffed up the tiniest big thicker, releasing another puff of pollen.

The filly stuck her tongue out at Gilda, laughing. "Why you- aaah, little aaah... -choo!" She sneezed once more, still more powder billowing out of her fluffy diaper. The filly laughed, Gilda glaring at her as she reached down to try and tug the padding loose. No matter how much she pulled and yanked on the tapes, though, the padding remained firmly secured to her rear, spreading her legs wide.

"Hope you have fun in your diaper, chick!" The filly laughed, trotting away from Gilda. As the griffon tried to regain her composure, she could have sworn she noticed seams running along the tiny black filly's body. But she was soon distracted by the pollen eliciting another loud sneeze from her. She fell down onto her padded rear, rocking back and forth as she sniffled and tugged at the locked padding.

Author's Note

Caution: do not tempt fate.
Well, too late now...