Unnamed pony #1297231 ushered back the crowd. "Alright, alright, stand back now y'all. I can feel it coming. I can feel it in my bones. Stand clear until the transformation is done. All y'all here have paid already, yeah?"
There was a general murmur of agreement.
"Good. Can't let anybody else find us out here. Now then. Please wait patiently while I morb."
"What."
"Transform! I meant transform."
The full moon emerged from behind the clouds. The mare screeched in unholy tongues as her frame grew larger, bulkier, and more metallic in composition.
I could do a big funny and write a detailed transformation sequence of a pony turning into a warehouse right here, right now.
Screwit it's 2 am I'll do it.
Her eyes widened with an unnatural glow, growing in size and migrating outward with the widening of her face. They flickered for a moment before settling in their new positions as lights on either side of what was once her muzzle--now a massive garage door. Her jaw thickened and lowered as it planted itself into the ground, literally cementing itself as a solid floor formed where flesh once existed.
An earsplitting crack reverberated through the forest as her body hollowed out and solidified. For reasons called "I'm keeping this fic rated E", a magical miasma rose up around her, concealing her form until the transformation was complete.
"Oh sweet, a warehouse!"
The stallion behind the producer of that quip smacked them across the face. "You watched that mare turn into the warehouse. C'mon, let's get our boat out already."
wtf did I write
What if the CMC tried to get their cutie marks in minor evil?
This could be done by breaking into homes and stealing spoons, loosening door handles, and worst of all, swapping out normal coffee with decaf.
What if twilight sparkle and all of her friends, the princesses, the cmc and their friends and family do the toy story 2 bloopers parody
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...backup sewers, reverse street signs, steal everybody's left shoe...
That was certainly quite the big funny; I think 'Rated E' is one of my favorite running gags in this universe of yours.
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... return empty snack containers to the pantry, reverse the direction of the toilet paper roll, redefine extant words...
One of life's great mysteries.
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yup
It's now officially my head canon that this mare is in fact the warehouse where Princess Luna's Night School For the Financially Challenged is located. It works because as Luna controls the moon she can force Unnamed pony #1297231 to transform when she needs the space.