The Nightmare Night Diaperthology Vol. I

Rainbow Dash blitzed through the decked out streets of Ponyville on Nightmare Night. Ponies in various costumes were nothing more than a blur to her as she sped on by to the center of town where she planned to meet the rest of her friends. And of course, she was the first one there, so early that the crowds were barely beginning to form around the various stands and events being held in the plaza.

With time to kill, the cyan trickster was already eyeing who would be the first prank of the night on the greatest night of all to play her tricks. In no time she found the perfect target, a helpless pony in a witches costume with her head fully submerged in a pale bobbing for apples.

She flew up to the sky and grabbed a grey looking cloud and gave it a smack. It crackled to life with electricity, sending a booming thunder crash reverberating through town square.

Everypony in the vicinity turned to where Rainbow Dash hovered over her victim who laid on the ground, her costume soaking wet with water and her witches dress turned inside out. Hidden under her get up was a thick diaper covered in pink frills now exposed for all to see.

“You’re not just any witch, you’re a baby witch!”

The yellow spot on front part of the diaper stood out even stronger against the white backing as well a harsh sagging in the backseat to boot. Dash noticed it and began to laugh even harder.

“And it looks like you’re more than just wet from bobbing for apples.Might want to sprinkle a little more baby powder next time, I think everyone can smell a little more than just pee!”

The humiliated witch brushed herself off of the ground and glared at Rainbow Dash muttering something the cyan mare could barely make out.

On this night come despair
Cast your gaze upon this mare
Let she learn her lesson
Lest this curse never lessen
Until she knows my pain and sorrow
Forever, on each and every morrow

A sudden gust of wind chilled the area. Rainbow Dash shivered as a slight tingle went down her spine, as if something was crawling up her back. She turned around, but nothing appeared to be there. And when she spun her head back, the witch was gone. She didn’t know what to make of it, but figured she just ran away from embarrassment. Before she could think more of it, her costume clad friends had arrived on the scene.

“Guys, guys, you just missed the most hilarious thing. There was this mare I pranked wearing a diaper and she peed it in front of everybody! Isn’t that so embarrassing, like what an absolute baby.”

Her five friends reactions were not quite what she expected. They stared blankly back at her, except for Pinkie Pie who was fighting a mad case of the giggles.

“Isn’t it funny? At least Pinkie gets it.”

At this, the party pony couldn’t contain her laughter.

“Is the pony you’re talking about by any chance, oh, I don’t know, you!”

Uncomfortable chuckles escaped the others as they awkwardly looked everywhere but the pony in front of them.

“What’s that supposed to mean, I-”

Rainbow Dash looked at herself after feeling a strange sensation around her. Her hooves were wrapped in pink booties and she could feel the ruffles of thick layers of fabric swaddling her, similar to when she let Rarity pose her in those over-the-top dresses as a favor. There was also a strip dangling off of her with a large pacifier attached as well as the crown of a bonnet peeking over her Rainbow mane. The most unsettling things about the new sensations she felt, however, were the wetness around her crotch and the thick puffiness keeping her legs apart.

“What the hay, this isn’t my costume, I was wearing a radical skeleton outfit!”

“A girly baby skeleton?”

Twilight tilted her head as she eyed the mare up and down.

“I can see the baby aspect but not the skeleton. Points for creativity though, that diaper in particular looks very realistic, don’t really see a whole lot of adult diapers with prints like that.”

The confused mare looked down at her padding and noticed that colorful pastel images of butterflies and flowers adorned her diaper, however many of them had faded away from being so heavily soaked.

Rarity snubbed her nose at the garishly pink get up.

“Yes, yes, what a very… Interesting costume choice this year Rainbow. Very different from your usual attire. But please tell me that’s lemonade or something, I do hope you didn’t really use that garment of yours.”

“I’m telling you this isn’t my costume! And I sure as hay didn’t pee in it!”

“It smells kinda real…”

Fluttershy interjected, sniffing the air.

“But oh, don’t take it the wrong way. It’s not a bad thing, it happens to us all sometimes. I- I’ve had some close calls myself, thought I can’t say I ever needed a diaper or anything… Not that it’s a bad thing Dashie. Like I said, nothing to be embarrassed about.”

Rainbow Dash’s jaw dropped.

“Fluttershy, girls, I’m telling you, I’m not a baby! There was this girl dressed like a witch! It must have been her! She muttered some weird curse thing!

Just as she said that, a mother and her little filly walked past.

“Mommy, mommy! It’s that girl from earlier at the apples, look at the size of her diaper it's sagging wet!”

The mother tugged at her child gently.

“Hush, it’s not nice to stare and point like that. Now let’s go trick or treat over there, away from the strange baby mare.”

Applejack rolled her eyes.

“Ya don’t have to lie. It’s a weird get up but if that’s what ya want to be for Nightmare Night it’s fine, just be honest. And uh… If you’re gonna use those there diapers make sure ya brought spares, don’t want to stink up every house we hit.”

At this point Rainbow Dash’s heart began to feel heavy with more than just the embarrassment burning away at her. Her friends seemed to have come to terms with the state she was in, but a desperation began to take a hold of her. She wanted them to understand so badly that it wasn't what it looked like and felt unable to articulate herself at all. No one was really paying her particular mind as everyone was dressed up in silly costumes, but in to her all she could see were hundreds of eyes all over her, laughing and making fun of her. Even her friends joined in on the ridicule in her twisted mindscape.

“I’m not a baby, I swear, I’m not! I didn’t pee myself! I didn’t wet my diapee! I’m a big girl!”

Rainbow Dash fell flailing on the ground throwing a tantrum and sobbing loudly, repeating over and over that she didn’t need diapers. Now the whole square was really given something to stare at, eyeing the mare who was claiming loudly to not need the very thing she began to use even more. Her diaper was now even wetter than before, soaked to the point of leaking as the heat of her pouting and wailing caused her to lose all control.

Her friends backed away slowly, except for Fluttershy, who bravely stepped forward to do something about the wreck of a mare in front of the group. She approached her and pat her head softly.

“You girls can go on without me. You know I don’t care too much for Nightmare Night, so I don't mind missing out. I’ll take care of Dashie here and figure out what’s wrong.”

The four remaining ponies parted with Fluttershy and Rainbow Dash immediately. She was their friend, of course, but this was a bit much for them to handle, and they were sure Fluttershy could handle whatever this was, at least for tonight.

“C’mon Dashie, I think you just need someone to talk to. I think this is all just a big ‘ol cry for help or something, right? Whatever it is I’ll get to the bottom of this. I’ll make you some tea to have with some Halloween treats back at the cottage, if that’s fine with you.”

Rainbow Dash got up with Fluttershy and followed her, letting out a few sniffles and stifled whimpers as she went. Without even thinking, she plopped the pacifier hanging off the clip in her mouth.

“Fank you Momma, I sowwy. I just a big girl. I don’t need diapees”

Fluttershy blushed, taken aback but Rainbow Dash’s complete personality shift.

“Oh dear… I, um, let’s just go... ”

And with that they were off, Fluttershy hiding Dash as well as her face under her wings, thinking all the way home about what she was gonna do about this big baby now on her hooves.