Sweetie Belle finds 1 of Twilight's spell books and tests them to try and get a cutie mark in magic like Twilight or Trixie. She casts a spell and accidentally turns all of the Mane 6's pets into stone. All of this happens while the Mane 6 are in the Crystal Empire to stop Sombra, except the ending.
HAHAHA WTH XD XD
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Yeah, I had fun with this, especially writing Aloe and Lotus Blossom, I'm working on a sequel too
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There actually wasn't enough material for a sequel, but the concept was that Philomena gets turned to stone by Twilight on accident. I'll let your headcanon have fun with that