SizeQuest

As inspired by https://derpibooru.org/544213

>"Okay, it's been fun being big like you Princess Cadence, but you can change me back now."
>"Um, actually Scootaloo, that was the counterspell. Do you feel yourself getting any smaller?"
>"No, I'm still as tall as you and I still have boobs as big as Princess Celestia's."
>"Yes, my bosom is still just as big. Goodness, how does Auntie carry these things around all day..?"
>"So, uh, can you, you know, fix this?"
>"I can try, but that counterspell should have done the trick. Maybe we should talk to Twilight?"
>"But we'd have to go outside! Everyone would see us!"
>"Well, it's not many girls that can boast of a princess-sized body. You could totally have fun showing off."
>"I dunno..."
>"Isn't there anyone that you'd like to show off to? Maybe give them a surprise?"
>"Hmn... now that you mention I would like to see the look on Diamond Tiara's face when she get a load of this hot bod."
>"Well there you are, let's get going to find Twilight."
>"Gulp! O-okay, lead the way."

>Fortunately, it was early in the morning so most of Ponyville was still asleep.
>The overendowed pair were able to make it to Twilight's Castle without drawing too much attention.
>Spike was there to greet them, more confused than anything else.
>"Oh hi Cadence... Scootaloo, you're looking... Different."
>"That's what we're here about, we need Twilight's help to reverse a spell."
>"She's gone for the day, she said something about heading to Canterlot. Can you believe she left without breakfast? Are you guys hungry? All these pancakes are just gonna go to waste."
>Scootaloo's not having it
>"There's no time for that now, Spike! I can't walk around like this all day, what if someone sees me!"
>"Well, I think it's a good look... You could ask Rarity about it, she was talking about models using, uh, enhancement magic. Maybe she'll know something about it? Or you could just try casting it again? Half the time when Twilight messes something up she just repeats it to cancel it out."
>Cadence is uneasy about the idea
>"and half the time it just makes it worse, right?"
>she pauses and takes a breath, emphasizing her massive chest
>"One cast gave us these, I'd rather not see what another would do. We'll go see Miss Rarity. Thank you, Spike."
>The two turned and walked out, straight into a pair of tree trunk thick legs.
>Even at her princess-level height, Scootaloo had to crane her neck to look all the way up to see who they belonged to.
>"Well howdy down there! Could y'all go and get Twilight for me? Had a might of an accident with some special fertilizer and I figure I'll need her help to fix it."
>Scootaloo pipes up when she realizes Cadence is staring slack-jawed at the giantess of a farmer.
>"Sorry Applejack, she's not in. We we're headed to Rarity's for a the same kind of problem. Want to come with?"
>"Might as well, I figure."

>as they set off towards the Boutique, Scootaloo just hopes having a ten foot tall companion will distract any onlookers.
>"Say, Applejack. What are you doing with magic fertilizer, anyway? Applebloom is always saying how strict you are about tradition making the best apples."
>"And that's the truth! But this was for a pear tree. A girl's got to have her hobbies, you know? Dang stuff sure is effective though."

>the party turns a few heads in town, but aside from a fainting flower vendor they reach the Carousel Boutique with minimal incident.
>a sign on the door says "The Fashionista is out" but Scootaloo pounds on the door, undeterred.
>a moment later, a muffled voice calls out "Sorry. Closed. Come back tomorrow."
>Scootaloo barges through the unlocked door. "Sweetie Belle? Is Rarity here? It's kind of an emergency."
>After a moment Cadence follows her in, Applejack crouchs to cram herself through the doorway shortly after.
>The group finds Sweetie Belle on a chaise lounge, huddled under a blanket.
>Cadence approaches. "Sweetie, dear, have you been crying? What's wrong?"
>"I did something I shouldn't have and now I'm gonna get in trouble and Rarity will never forgive me and I thought I could stay out of trouble alone but I messed up and I just don't want to disappoint Rarity but I did and now look!"
>with a deep breath Sweetie Belle throws off the blanket, revealing a pair of breasts large enough to rival Cadence and Scootaloo's, even more exaggerated by her small frame.
>there's a slight pause before a simultaneous "what" from the visitors.

>after taking a moment to dry her eyes and catch her breath, Sweetie Belle elaborates.
>"Rarity was in such a rush this morning, I thought I could help her out by convincing her I was big enough to stay home alone so she wouldn't have to take me all the way out to mom and dad's. She just said to stay out of her dressmaking stuff, so I totally did!"
>"I was feeling so grown up, I wanted to try on some of her grown up clothes. I figured she wouldn't mind if I only touched the stuff in the back of the closet, the stuff she never wears, I wouldn't make her mad."
>Scootaloo nods, Cadence and Applejack share a sigh.
>"but waaay back behind everything else I found a bra I just had to try on. It was big and red and shiny and just so pretty, I was only going to wear it for a little while! Just long enough to put some bean-bags in it to try it out. Honest!"
>Cadence pats her on the shoulder. "But when you fastened the clip it blew you up like this, right?"
>Sweetie nods. "So I panicked and undid it as quick as I could but by then it was too late and now I'm stuck like this forever and Rarity's gonna kill me!"
>"Oh dear, you're supposed to let the bra's enchantment finish, then there's a release to return your chest to normal when it's done and you're ready to remove it."
>Applejack shoots Cadence a dirty look, but the princess ignores it
>"So now I'm stuck with these forever?!"
>"No, I'm sure we can find someone to get you back to normal. Apparently Twilight was in a rush to get to Canterlot this morning too, did Rarity say what the hurry was?"
>"No, just something about a tea emergency. How can tea be an emergency?"
>"I'm not sure, but Twilight used to be a regular at a tea house in Canterlot. I imagine we'll find out there."
>Applejack is less than thrilled.
>"Shoot, I'm not looking forward to a train ride like this."

>Cadence approaches the ticket counter alone, the rest of the group off to the side, trying to be as inconspicuous as possible.
>read: obviously conspicuous
>"Hello, I need to rent a cargo car to Canterlot, please."
>"Sure thing, ma'am. You're just in time too. Shall I book a room in the luxury car for you as well?"
>"No thank you. My companions and I will be riding together. We will require complete privacy."
>"Of course, Princess. I'll send word to have a car cleared now. You can load in around back, away from the main platform. And if I may say so, you're looking more beautiful than ever."
>Cadence ignores the compliment and signs the authorization.
>Soon enough, the gang files into the trailer. Cadence and Scootaloo on one side, Sweetie Belle in Applejack's spacious lap on the other.

>it's a ways into the ride before anyone breaks the awkward silence.
>finally, Applejack speaks up
>"Sure was kind of y'all to join me back here. Can't be too comfortable over there for Ya."
>"Oh, it's not so bad." Cadence replies.
>Scootaloo perks up. "Yeah! At least we've got these big fat butts! I bet I could sit anywhere on mine!"
>Everyone shares a giggle at that.

>It's a bustling afternoon in Canterlot
>But everyone is too caught up in their own business to pay much mind to the unusually sized ladies making their way to the tea house.
>Aside from giving the tall one an extra wide berth, anyway.
>They're stopped outside when they see a who's making their way out the door.
>Sweetie Belle and Scootaloo cry out together. "Nightmare Moon!?"
>Applejack quickly picks Sweetie off her shoulder and lowers her to the ground before squaring up.
>The monstrous monarch has a few feet on her, but years of play wrasslin' with Big Macintosh have her confident.
>"RELAX, FRIENDS. IT IS I, PRINCESS LUNA!"
>"Just what the hay is going on here?!"

>"T'WAS INTENDED AS PART OF A PRANK ON MY DEAR SISTER. BUT IT SEEMS THE 'JOKE' IS SQUARELY ON ME, FOR NOW I AM STUCK LIKE THIS UNTIL TONIGHT WHEN I CAN RAISE THE MOON."
>Cadence facepalms. "As if today could get any weirder."
>"THE WORST OF IT IS, I WAS THROWN OUT FOR QUOTE 'DISTURBING THE PATRONS' AND 'CAUSING A SCENE' LEAVING ME UNABLE TO TO PROCURE AN ORDER OF THE RARE SADDLEHORN PEAKS TEA THAT ARRIVED TODAY."
>"Well, that explains the 'emergency.' Say Luna, we've been having magical troubles today. Do you think you'd be able to help us reverse a few spells?"
>"NAY, I AM AFRAID THAT MODERN SPELLCRAFT IS VASTLY DIFFERENT FROM HOW I TRAINED, AND I HAVE NOT HAD AN OPPORTUNITY TO CATCH UP ON MY STUDIES SINCE MY RETURN."
>"Did you happen to see Twilight or Rarity when you were inside?"
>"THEY WERE LEAVING AS I ARRIVED, I BELIEVE THEY MENTIONED THE SPA IN SOUTH CANTERLOT"
>"I suppose we should head that way, would you care to join us?"
>"ALAS, I AM IN NO MOOD FOR SO-CALLED 'R AND R.' I HAVE A STRONGLY WORDED LETTER TO PEN TO THE PROPRIETOR OF THIS BUSINESS. THOUGH I DO WISH YOU THE BEST OF LUCK IN YOUR QUEST."
>"Well, that was a bust. I suppose we'll try the Spa next."

>The spa attendant was not exactly helpful.
>"I'm sorry, but policy dictates that patrons are not to be disturbed. Princess Twilight and Miss Rarity are booked for an hour of massage."
>Scootaloo takes the lead, slamming her hands on the counter.
>"Listen, lady you're you're going to get Twilight Sparkle right now, or you're going to take us back there to see her. You see my big friend here? Does she look like she's willing to wait an hour?"

>The manager emerges from her office.
>"Oh my! I'm terribly sorry, Princess. You and Princess Cadence must be close friends of Princess Twilight and this is clearly a special circumstance. Please follow me, right this way."
>Scootaloo is doing her damnedest to suppress a blush at being called "Princess."
>Applejack's just happy that the Spa's vaulted ceiling means she doesn't have to stoop down.
>She does have to wait outside of the massage room with the manager, as the rest of the crew file in clamoring for Twilight's attention.
>Twilight takes one look with half-lidded eyes and sighs.
>"Let me guess. Magic mishaps?"
>everyone nods
>"Alright, let's see. Cadence, you used the spell on yourself and Scootaloo at the same time right? Cast it again, on both of you. Make sure you do it just like you did it the first time and it'll cancel out. Applejack: enchanted fertilizer? Go take a bath, your clothes will shrink down to normal when you wash them too. Stop ordering from that F&F Co Catalog. You know that stands for Flim & Flam, right?"
>She pauses as the masseuse moves down her back.
>"I'm not sure what exactly to do for you, Sweetie Belle. If you were messing with your sister's things, I suggest you apologize, beg her forgiveness and pray she has a solution to whatever you got in to. Judging by the wet spots on your shirt you'll want to do so sooner, rather than later."
>Sweetie looks ready to break down in tears when Rarity hushes her.
>"Dear, you just need a good milking to get back down to size. With any luck you'll be left with only minor swelling. Fortunately, you're in the building with the most gentle hands in Equestria. Now please, leave us be. We'll discuss this later, over tea."
>Left alone, Rarity mutters to Twilight
>"I do hope she didn't snap Big Red, it would be a shame to have to murder her."

>Sure enough, the girls are all back to normal by the time Rarity and Twilight are done.
>With only minor lasting effects.
>Applejack's a bit taller
>Sweetie's chest is a bit swollen
>Scootaloo and Cadence are a bit bigger and more 'padded' all over, but nothing too noticeable
>All in all, it made for a strange day and a good entry for the friendship diary.

Epilogue:
In the largest mansion in Ponyville, several hours earlier:
>Diamond Tiara idly munches on cereal, reeling from a hangover from too many hard lemonades.
>Silver Spoon calls her from the other room.
>"Hey DT, remember last night how you said wishing on falling stars was something little kids did?"
>"uh, yeah?"
>"And remember how I wished I was the biggest, most grown up woman around just to show you?"
>"sure, whatever"
>"Check it out!"
>Diamond Tiara looks up and does a spit-take as an eight foot tall, impossibly busty, silver haired goddess casually strolls in to the kitchen.
>"Oh what the fuck."