Rarity
Rarity laid in her bed with an ice pack over her head as she moaned tiredly "What happened just now?" She murmured as she shuffled herself out of her covers "I felt as if I went on some fierce spree of sorts...I didn't hurt anypony, did I?" She grunted and gritted her teeth when she felt a shot of pain into her head "Confound this pain! I don't know how it happened, but I'll be sure to find the one responsible!" She then sighed as she hopped out of bed "Maybe I should make myself a good meal before I get back to work..."
Rarity trotted down the stairs and into the kitchen where she made for the fridge where she would rummage for any good snack that felt right for sustenance. When she opened the fridge, she slowly scanned through what was in stock "Let's see...Eggs...Cheesecake...Spaghetti...Milk...Weird skull with rubies for eyes...Cottage Cheese...Zap Apple ja-" She stopped herself as she went through the inventory and slowly directed herself back to see a skull leering at her with ruby eyes as a red bold '8' was adorned on its forehead. While they seemed divine, the image in the whole was frightening as the alabaster unicorn jumped back in surprise "WAHAHA~!! What in Celestia's name is a skull doing in my fridge!?" She stared at the skull with wide eyes.
Thromnambular ignored Rarity's shock as it proceeded to give her experienced verse.
"That does not matter for you now, my dear.
There is no need whatsoever to act out in fear.
My name is Thromnambular, and what you desire
I can summon at a whim for you to acquire!"
Rarity was now curious at Thromnambular's words "You? A granter of wishes? And just how am I supposed to trust you on that note? More importantly, where on earth did you come from?" The talking skull scoffed.
"You musn't get so touchy, little mare.
Any wish is granted, so long as you prepare
To speak to me in the most clearest of words
So that whatever you wish for doesn't seem absurd!"
Rarity arched an eyebrow at Thromnambular and trotted towards the door as she lifted him out with her magic "I can wish for anything? Anything at all?" Thromnambular nodded as Rarity rubbed her chin in thought "Now that makes this little scenario interesting..." The fashionista dug deep into her mind to see what it was she so greatly desired 'I could easily wish to be the most beautiful mare in Equestria, but I'd say I'm well enough on appearance...Oh! I could always wish for everypony to live fashionably fabulous! But then again, everypony has their OWN preferences...Maybe I should just wish for something for myself...' She looked down "Oh, sometimes it's so hard to think at this age...I missed those days where I would roam about carefree as a little filly in the park..." She then perked up as she beamed to herself "Ideeeaa~!!" Rarity cleared her throat as she turned to the skull in her possession "Thromnambular! I'm ready to make my wish now! What I would desire is to live my life as a little filly again for only a day! It would be marvelous to see that wish through!" She was startled when Thromnambular started to glow and float by himself.
"So the full grown mare wishes to be a child...
A joyful infant, so tender and mild...
So shall it be said, so shall it be done...
Let us hope this day of yours shall be fun!"
Thromnambular laughed as the '8' on his forehead vanished, only to be replaced with a bold red '7' that appeared afterwards. Then, he glowed brightly as the room around Rarity was in a bright light.
_____
Rarity opened her eyes and noticed that she was lying on her back while staring at a ceiling "Well, that's funny...I wonder what happened." She paused before she shifted to the side "Wait a minute..." She noticed wooden bars as she bounded to her feet "A crib?" Rarity inspected herself to see that she was not in the body of her filly self, but her same old self, only she was wearing a diaper and a small pink ribbon in her hair "What is going on!? This isn't what I meant for myself at all!" Everything in the room was full of toys, and foalish drawings of dresses.
She heard the door open, and Rarity looked to see her mother, Pearl, walk in with a bright smile on her face "Oooooh, my little Rar-Rar's awake! Did you sleep well, my little beautiful baby?" She cooed her last sentence with slight baby-talk.
Rarity scoffed "Mother, you're making a mistake! I'm a full grown mare! I'm just wearing diapers and this garish pink ribbon!" She scowled as she fussed with the ribbon on her head "Honestly, I never knew what came over you when you chose to put this on my mane as a child!"
Sadly for Rarity, all of her coherent talking was only childish babble to her mother. Pearl trotted over with a spring in her step as she picked up Rarity with her magic "Such a cute little baby you are! Let's get you down to the kitchen so we can get you some nice baby food!"
Pearl trotted out of the room with Rarity in tow while the fashionista donned a face of sheer horror "Not baby food..." She squeaked feebly as she was frozen in place.
When the two unicorns reached the kitchen, Pearl stuffed Rarity onto a purple high chair as her body felt constricted by the miniature size. Rarity struggled as she was confined to the wooden prison as the small table sat in front of her, and whimpered when Pearl wrapped a bib over her neck with her magic. Rarity inspected the fabric and whined "This is the worst bib ever!! It's yellow and green!! Why would you do this to me as a child!?"
Pearl took in Rarity's whining as slight crying as she patted Rarity's head "Oh, don't fret my little Rar-Rar! Just let mommy get you your favorite set of mushed carrots and you can have all the num-nums you want!"
Rarity's eyes widened as she frantically shook her head "Nononononononononononononononononononononononono-"
"Numnumnumnumnumnumnumnumnumnumnum" Was all that was heard by Pearl as she giggled "Yes, I'm getting your num-nums, Rarity! You adorable little filly you! I'm so glad I met your father so we could bring you into this world!" She rummaged through the fridge to find the baby food.
On cue, Rarity's father, Magnum, came in with a smile "Did somepony call me? I'm home, honey!"
Pearl gasped as she stopped her food venture to trot over to Magnum to give him a peck on the lips "Welcome home, dear! I was just about to feed Rarity!"
Magnum gave a hearty chuckle "So you were, eh? Where's my darling little girl?" He said as he draped a hoof over Pearl's neck.
Pearl pointed over to a struggling Rarity "She's right over there! Why don't you go and say hi to her while I get her food?"
Magnum smiled over at Rarity "Awww, ain't that cute? She's trying to act all tough again! It'll be nice to know we're raising a strong little mare in the house, huh, honey?" He trotted over and stopped in front of Rarity with joy in his eyes "Look at you. You're gonna be as beautiful as your mother when you grow up!"
Rarity struggled more before she responded "But I AM grown up, dad!! This is all because of some sick twisted skull that loves to rhyme a lot! Get me out of this chair!" She then remembered her horn and mentally facehoofed before she lit up her horn and undid the high chair as she hopped off and glared at her parents "Now listen to me, both of you! I want you to remember that I am an adult and should be treated as such! If this is one of Pinkie's prank, then you must know that I am not one bit amused by this little tactic-"
Magnum and Pearl stared at Rarity while they saw her babble and flail after she undid herself from the high chair. Pearl paused before she smiled "Look at her. She's learning every day! Before we know it, she'll be talking by next week!" Pearl said as she leaned next to Magnum.
Magnum nodded "You bet! But we better get her up on the high chair before she decides to run amok! Wouldn't want her to go crazy with her magic like the other unicorn babies!"
Pearl gave a light gasp before her horn lit up "Oh, you're right!" She said as she lifted Rarity and buckled her back on the table "Can you watch her just in case she does it again, dear? I still have to feed her!"
Magnum smiled "Sure thing, honey! And you should probably get her baby formula as well so she can wash it all down!"
Pearl nuzzled Magnum "It's good to know you care for our little girl!" She trotted back to the refridgerator and went to get the carrots.
Rarity growled as she went to undo herself from the table, only to have her horn lightly grappled by Magnum "Whoa-ho-ho there, Rarity! We wouldn't wanna upset your mother, now do we?"
The fashionista was agitated as she swatted away her father's hoof "Would you cease this intolerable behavior already, father!? I am not a baby! This is the fault of some wish-granting skull!! This whole experience was not what I wished for when I said I wanted to be a little filly again!! Just drop this whole charade and let me go so I can work!!"
"Found it~!!"
Rarity dreaded her mother's singsong voice as she levitated a jar of orange mush and a bottle full of baby formula towards her and she struggled profusely as she came closer.
Pearl dug a spoon into the jar after opening it and she presented the spoonful of mushed carrots towards Rarity's muzzle "Come on, Rar-Rar! Make way for the carrot express!"
Magnum nodded "C'mon, pumpkin! Down the hatch! You gotta eat up if you wanna grow up! This stuff's good for you!"
Rarity buckled her lips shut as she avoided the spoon coming her way by turning away her head opposite of whichever direction the mush came in 'She must be growing senile if she thinks I'm going to eat that toxic sludge she calls food! It was bearable as a filly, but not now!!'
Pearl sighed and shook her head before she poked at Rarity's belly and somehow caused her to open her mouth reflexively. When the fashionista's maw was open, Pearl proceeded to spoon feed the mush, much to Rarity's displeasure. She giggled to herself as she drew out the spoon "Works every time!"
Rarity's cheeks were puffed as her mouth was full of mush before she gulped it down and gagged in disgust 'How does she do that!?' She never thought she could have been fed so easily when she acted stingy around baby food at a young age.
Pearl then dug another spoonful "Okay, Rarity! Ready for another bite?"
Rarity growled before she went to release herself from the table again. Sadly, Magnum was there to prevent it as he lightly tugged at Rarity's horn "C'mon, Rarity! Finish your carrots! You're gonna have some baby formula after this!"
The fashionista struggled before she let out a yell in agitation. A dumb move when she failed to notice the spoonful of toxic sustenance going into her mouth and down her throat for a second time. She gulped again before she coughed and hacked in disgust.
Rarity's parents smiled as Magnum released his hold on Rarity "That's much better, my little Rar-Rar! Now we'll just feed you your formula and maybe we can go for a walk in the park!"
Rarity was lifted up by Pearl's magic along with the bottle as it was jammed into her mouth. Noticing it was futile to struggle in a magic grip, Rarity only cried softly as she drank up the baby formula. This was going to be a long and grueling day for a fashionista who wanted to be a child again...
2 down...7 to go...