While taking a walk on the outskirts of Ponyville one day, Twilight Sparkle stumbles upon an odd sight. A grown colt dressed like a foal. The strange pony stops to chat with her a second before proceeding on his way. Twilight expects the strange encounter to end there, but little does she realize this short encounter will have a much larger impact.
Art by: MommyMidday
Story contains: Mind Alteration, heavy diaper usage.
While taking a walk on the outskirts of Ponyville one day, Twilight Sparkle stumbles upon an odd sight. A grown colt dressed like a foal. The strange pony stops to chat with her a second before proceeding on their way. Twilight expects the strange encounter to end their, but little does she realize this short encounter will have a much larger impact.
It was a beautiful day as Twilight Sparkle strolled along the road on the outskirts of Ponyville.
Her schedule had been wide open for the day, and the alicorn decided it would be nice to take a nice walk around the outskirts of town.
It was pretty quiet as she walked along, only having passed a pony or two on her little stroll.
Other then the occasional cottage here and there along the way there wasn’t any real reason for somepony to be on the outer roads.
Not that Twilight minded the peace and quiet.
It was nice to just be alone with her thoughts, just the sounds of the birds occasionally interrupting her train of thought.
As she made it over the next bend, she could see a pony in the distance walking toward her.
She didn’t give it much thought, figuring the pony to be one that lived out here or just enjoying the day like herself.
Perhaps that was why she stopped dead in her tracks as she and the other pony began to get close to one another on the trail.
Trotting toward her was a unicorn colt, not much older than herself. From a distance it had looked like he was wearing a t-shirt and overalls, but now that he was in clear sight, Twilight could see this was not quite the case.
The garment didn’t have legs, only wrapping around the stallion’s rump and rear.
Twilight could also see bits of fabric that matched the stallion’s shirt peaking out past the leg holes, and further past them, what appeared to be white plastic.
It was an outfit that Twilight was somewhat accustomed to.
She had seen many foals dressed like this. The Cake twins occasionally wore these types of cloths, and she had changed her niece Flurry Heart in and out of them a few times as well.
Still, she could hardly believe the full grown pony walking toward her was wearing a onesie and shortalls.
With each step toward her however, it became harder and harder to deny.
The sight became only clearer as he drew near. His large rear, the crinkle in his step, and his widened gait all gave little doubt that he was wearing a diaper.
As if that wasn’t obvious enough, Twilight could also see a pacifier clip attached to the stallions shortalls, attached to a baby blue pacifier that was in his mouth.
He didn’t seem to notice her at first, seeming to be too busy sucking on his pacifier with an amused smile on his face.
As he turned to face her however, his eyes widened and a big grin appeared on his muzzle as he got closer, hobbling quickly over to the purple alicorn and spitting out his pacifier so that he could speak.
“Hi there! I’m Little Tyke! What’s yours?” Said the unicorn.
Twilight was still in a slight state of shock, but she still managed to answer.
“I’m… Twilight.” She said as she looked the colt over.
Little Tyke seemed to take notice. “Do you like my outfit? Mommy picked it out for me! But I helped! She says I’m the cutest colt in the whole wide world!”
Twilight stared dumbfounded at the statement. Could this colt’s Mommy really have suggested he dress this way?
He continued to look patiently at Twilight for a response, but decided to speak when he didn’t get one after a few seconds.
“You wanna play? We can play tag! Or paddycake! I love that one! Mommy taught me and I can remember almost all the- ugh!”
In an instant the colt stopped speaking, a panged look replacing the bubbly happy one that had been there a second earlier.
“Are you ok? What’s wrong?” Asked Twilight, surprised at how quick the colt’s demeanor had changed.
The colt turned away from her, taking a few steps before pushing his body into a squat and grunting.
Twilight reached out a hoof in concern and got closer, hearing Little Tyke begin to utter a simple word.
“Pu…Pu…POOPY!”
Before Twilight could react, the stinky smell of what Little Tyke had done assaulted her nostrils. It had knocked the wind out of her, causing her to collapse to the ground in a fit of coughs as she tried in vain to plug her nose and back away from the colt filling his pants.
She watched from a distance as his rear expanded bit by bit, causing more and more of the diaper beneath his cloths to emerge. His cloths were in a losing battle to keep it contained, and after a few grunts and pushes, the buttons on his shortalls and onesie snapped in unison with a loud chorus of snaps.
The majority of his disposable underwear was now fully visible, sagging with a brownish tint as the colt continued to push an unbelievable amount of mess into his seat. The sound of liquid making content with the diaper’s insides in between his grunts also told Twilight he was wetting his diaper too.
She wanted so much to back away further, to put as much distance between herself and this ballooning diaper full of muck as possible.
All she could manage to do though was stare and cough in a strange trance of grossed out agony.
She wasn’t sure exactly how long it had been before Little Tyke finally finished using his diaper. It could’ve been two minutes or two hours, she really had no idea.
She was just thankful when it was over and the stench at least began to get a little less bad.
Little Tyke let out a long sigh of relief, his tummy now feeling much better after his mess made its way into his diaper.
He reached a hoof back and prodded his diaper’s bloated exterior curiously, giggling with glee at how mushy it was.
He then eased himself back up into a full standing position and turned back toward Twilight, who was still coughing from the smell emitting from his diaper.
“Hehe! I better head home so Mommy can change me! I don’t think my diaper can hold much more!” Said Little Tyke with a big smile as he began to waddle away.
Twilight could barely make out his cutie mark, a ring stack, beneath his diaper as she tried to regain her senses.
“How in Equestria can you be so happy pooping yourself?” Asked Twilight as nicely as her grossed out mind could manage.
Little Tyke turned back, answering as if it was it was obvious.
“Cause I like it that’s why! It feels way better in my diaper then in me!” He said with a giggle and continued on, his desire to play long forgotten in favor of having his diaper changed.
Twilight watched him waddle down the path and out of sight, taking in more and more fresh air as he got further away.
She eventually regained her composure and picked herself up, continuing in the opposite direction toward home.
She had never meet a pony like that before, and didn’t really want to again.
One thing that she couldn’t quite get out of her head was what Little Tyke had said.
“Ugh! Not again! ” Screamed Twilight as she woke up to another disappointing realization.
It was now two weeks later and she had not been having a good time lately.
Around her waist was a diaper. Well not exactly. The package, which featured a mare on the front, proclaimed that the contents were “absorbent underwear”.
There was no fooling Twilight though. Although the garment was a light pink with a print on lace design throughout to make them look less embarrassing, the wet squish of the garment pressing against her crotch as she made her way out of bed and to the bathroom to clean up told her exactly what it was.
It had all started last week, waking up a few mornings wet. She tried to convince herself it was just her drinking too much before bed and altered her routine.
But as the odd night here and there turned into a daily occurrence the following week, Twilight knew she had to do something, and had picked up a package of adult “briefs” at the Ponyville pharmacy a few days ago.
She had kept reading and trying new things to try and get a handle on her new problem, but nothing seemed to be working!
It also didn’t help her that she had begun to worry so much about her problem that she rarely focused on anything else.
Her students had started to tease her about her absentmindedness, and whereas before she could usually make a wise remark back to retake control of the situation, she now found herself getting nervous and choking up when faced with her students disruptive remarks.
She debated taking a leave of absence, but she didn’t want to do that.
She didn’t want to let her students that were there to learn down.
She eased her wet diaper off her flank, poofing it to the local dump so no creature would know about her bed wetting.
She didn’t want to let anypony know what was happening at the risk of getting teased.
She stepped into the shower, washing over her entire body, her mane, and her tail before taking a moment to enjoy the warm water flowing over her.
She then turned off the water and stepped out, drying herself off and brushing her mane and tail before setting off for the day.
She was just glad she didn’t have to wear those stupid things during the day.
Another two weeks later saw Twilight Sparkle deep within the confines of her library, a large amount of books spread across the table being levitated, read, and flipped through before being put back down and another taking its place.
Her nightly accidents had only gotten worse, with her starting to leak through her nighttime briefs and having to go up to the extra absorbency ones in order to make it through the night.
That was nothing though.
Wetting her bed was something she could handle, but wetting herself during the day was a whole other matter.
It had been after yet another disruptive student had mocked her in class, making her feel small and helpless.
She hadn’t even realized what she was doing until she heard the sound of flowing liquid and her student’s laughter.
She had run out of class and straight to her room, crying all the way.
She had never been so embarrassed in all her life.
Since then she had not been back to class.
All the changing of her habits had not yielded the desired results, which made her think it must be some kind of magic that was making her wet herself.
She thought perhaps it could have something to do with the odd pony she’d seen a couple weeks ago, but if he had somehow cast a spell on her she imagined she would’ve detected it.
She had spent many long days in the library, going over anything she could think of that might explain what was happening to her, but so far had no luck.
Despite her extensive time researching, she did take some time each day to venture out and do some shopping, albeit in a cloak so no one saw her diaper.
She recently found herself wanting to wear cloths more, but found her current selection rather lacking and not what she was currently interested in.
The first few times she went out, she couldn’t seem to find anything she wanted to wear.
That was until she passed a storefront one day with the most adorable cloths she had ever seen!
She had immediately galloped inside, gazing happily at all the cute designs and colors available.
It wasn’t until she went to find her size however that she made a stunning realization.
She had unknowingly gone into a little pony’s store, all aimed at young grade schoolers.
She had felt silly at first; wanting to wear something a little filly would wear. But despite her best efforts she couldn’t seem to leave the store.
She instead began to go through and grab whatever outfit suited her.
Pants with flowers embroidered on them, frilly dresses, shirts with cute princess and animal designs.
Nothing said big ponies couldn’t wear them right?
All they needed was a little magic to fit her big girl body.
Somehow this logic satisfied the purple alicorn, and lead to her filling her closet with the cutest designs imaginable. All looked like they’d be right at home on a playground or in a grade school classroom, but sized to fit the curvier and larger frame of a grown mare.
Today, Twilight had chosen a pastel shirt with kitties on it, and a pair of jean shorts with paw prints on them.
Just wearing something over her diaper made it a million times better and easier to work! Even though no creature was going to see her anyway.
She would lock the door to the library every day when she came in, only leaving to get food and at night for bed.
Spike and Starlight had tried to talk to her, not to mention her other friends, but she insisted she was fine. She just needed to keep working.
The answer had to be in here somewhere!
As she looked at the clock, she decided to take a break and venture into town again for more cloths.
There were still plenty of stores she hadn’t looked through yet!
As she made her way toward the door and ultimately to the ground floor, she didn’t even notice herself beginning to soak the front of her diaper, much too excited for the adorable cloths she was going to see to focus on the warm and wet feeling incasing her crotch drop by drop.
Twilight sat in her library at a table, trying her hardest to concentrate.
After almost two weeks of research she had made few leads and almost no progress on what was happening to her.
She was now almost completely incontinent, barely noticing when she was going in her diapers until sometimes minutes later.
She had now begun setting a kitchen timer every thirty minutes to check herself as well as to see if she needed to go and try to make it to the bathroom, but had no success thus far.
She had even had to double up, wearing two of the extra absorbent nighttime briefs at a time to hold her large accidents.
It was almost as if her body was mocking her attempts at trying to go to the bathroom like a big pony!
To make matters worse, she found her focus was now hard to keep on her research.
She would be right in the middle of readying a book on obscure curses, only to find herself an hour or so later reading a children’s book, giggling along to the silly characters with her hoof in her mouth.
She was sure this was the magic further affecting her, trying to protect itself and keep her from finding the answer.
She would become upset when she came back from these trances. Thankfully, she had plenty of stuffed toys to hug to help make herself feel better.
It had been another one of her many new purchases as of late.
After her closet had become jam packed with her new cloths, Twilight began buying up other things in the stores she visited.
It had started off with just a few stuffed animals, but had grown to looking like a zoo with the sheer amount of them all in her room and corner of the library.
Of course none could compare to Smarty Pants, her favorite doll from her childhood she had dug out of storage to keep her company.
Other things over time like blocks, toy trains and toy air balloons, and a few other kids’ toys had begun to appear.
Twilight didn’t really know why she was buying them, only feeling a bit more comfortable with these things around her. It made the space feel brighter, happier almost.
She did get annoyed though when she would find herself emerging from her trances playing with them, even though a sense of giddiness and satisfaction seemed to illuminate throughout her when she first came to.
Finding nothing in her current book, she quickly went and grabbed another from the stack, not even realizing it was a picture book until it was too late, her body relaxing into a more comfortable position as she read the story of the pony princess in the tower. Her hoof slid absentmindedly into her muzzle to suckle on, as she became too compelled by the story to notice the cramping in her tummy.
Twilight Sparkle lay on the sofa in her library, looking through a book she barely bothered to read the words of.
She found the pictures to be much more fun than the words!
It had been almost two months now since her little problem had started. Not that she really thought of it as a problem now.
The alicorn barely focused on searching for a solution to her problem anymore. It had been days since she last looked in one of those boring magic books.
She spent most of her days now playing with her toys!
She would spend hours each day, playing with her dollies and stuffed animals.
She had become less shy too, now wandering the castle during the day playing.
That was how Spike and Starlight had found her one day, wandering the halls with Smarty Pants, a paper hat, and sloppily drawn map pretending to look for treasure.
Her diaper had been in quite a used state, and when asked about changing herself, the alicorn simply replied she didn’t remember how.
This had lead to Spike and Starlight taking turns of keeping an eye on the infantile alicorn, making sure she was changed and looked after regularly.
They had immediately reached out to their friends and the Princesses for help.
Twilight was so happy to see her friends again! Although they weren’t that good at playing games.
Everypony was currently hard at work, searching through every book they could get their hooves on that might explain what happened to Twilight, but so far were having about as much luck as she had.
Her room and portion of the library she had been using prior were also quite a surprise when her friends had found them, with her room now featuring a crib and mobile and toys scattered along with cloths about the floor.
The corner of the library looked like a messy play room with the amount of toys and other things on the floor and chairs.
A few pacifiers, a rattle, a few baby bottles, and other foalish things lied around, all as far as they could tell bought by Twilight and made for her size with magic.
In her room they also found lots of foal diapers that had been magically made bigger to fit her size.
All featured colorful designs of stars and moons that faded when wet, the most absorbent nighttime filly diapers available.
Twilight certainly seemed to need them now too.
The alicorn would go from a clean diaper to a full one in what felt like no time at all, her diapers front and rear full to capacity by the time she was brought and laid down for a change.
Luckily she could still talk, albeit her words now having a filly-like lisp to them and not making much sense.
She now sounded like any other toddler, excited about little things and fussy at the slightest annoyances.
She still loved to wear her cloths, something Starlight and Spike weren’t fond of due to getting in the way of her frequent diaper changes. But it was better to just go along with it rather than have the big filly throw a tantrum.
Today she was dressed in just a long sleeve top with a diamond design throughout and a sparkly number one on the front.
An easy outfit today, which Spike had been grateful for when putting it on her this morning.
He and the others were scouring through books in search of some way to bring Twilight back to normal, all while keeping a passing glance on the large foal to make sure she didn’t wander off or get into mischief.
Lucky for them Twilight had been staying put on the sofa while looking at her book and sucking her pacifier for a good while now.
Unfortunately as they all gathered round to hear a lead Starlight had found, Twilight had gotten bored, her childlike attention span now thinking of something else to do.
But what? She thought for a moment before it struck her. She wanted to play outside!
A second later, she poofed her way outside the castle, giggling gleefully behind her pacifier as she trotted down the road with a skip in her step.
Her friends were oblivious to her going missing, and wouldn’t notice for awhile she was gone.
In that time she wandered far from the castle, occasionally chasing birdies or butterflies as she toddled wherever her little mind decided to wander.
Later as she wandered further down the empty road, she saw a figure walking toward her in the distance.
As she got closer, she could see it was a unicorn colt, wearing a blue stripped onesie and suckling a pacifier of his own.
Twilight could swear he looked familiar. But from where?
She tried to think hard, plopping herself down on her padded rump and trying hard to concentrate as Little Tyke approached her.
“Twilight!” He exclaimed, running over and giving her a hug.
Twilight smiled and hugged back.
She remembered now. It was Little Tyke! One of her bestest friends.
“I like your outfit! You look so cute!” He said as he released her from the hug.
Twilight beamed.
“Thanks! I picked it myself!” Said Twilight with glee.
“You know, I think we can make it cuter.” Said Little Tyke.
“How?” Asked Twilight.
Little Tyke lit up his horn and shot a burst of magic at Twilight.
Before her eyes, her outfit began to change, the bottom of her shirt growing down and wrapping around her diaper and snapping tightly around her butt to give her padded rear some extra support as her shirt turned into a onesie.
The text on the front also changed slightly, with a pound sign appearing next to the one and the word “stinker” appearing below it.
Lastly, her diaper seemed to grow even bigger, extra bulk being added so that it had prominent peakage out of her new onesies leg holes.
Twilight giggled with glee. She didn’t know what the words on her front said, but her thick diapee and its snug fit made her feel extra small and happy!
“What’s it say little Tyke?” She asked, hoping her friend would know.
“I’ll give ya a hint.” He said with a giggle, turning around so that his bottom was facing her and squatting down.
Twilight instinctually did the same, mirroring his position.
Both ponies began to grunt and push, their diapers beginning to fill in back moments later. Their crotches soon followed suit as they grew warm and damp with pee.
Before long, the strain of their poofy diaper’s expansion was too much for their onesies, causing their snaps to burst open and their diapers to sag down past their hocks as they finished filling their diapers to their content.
Both turned back around to face each other again, looks of relaxed contentment on their faces.
Little Tyke giggled. “You stinky Twilight!” He said.
“You stinky too Little Tyke! Made big poopies.” She said.
“Come with me! Mommy will change us then we can play more!” Said Little Tyke.
“Yay!” Exclaimed Twilight as she followed behind her friend, both of them waddling as fast as their large diapers would allow.
As Twilight waddled, watching Little Tykes messy diaper shift from side to side in time with her own, suckling her pacifier on her way to get her diaper changed, she realized Little Tyke had been right.
