Spin-off of My Little Pony: Friendship Is Absurd. Takes place after Chapter 43 ("Shadow Played").
What would have happened if, in reaction to Anon-A-Miss, the main characters hadn't jumped to conclusions? What if they waited for more proof? The answers... are not found in this story. Instead, enjoy an absurd parody of My Little Pony: The Movie.
Actual plot synopsis: It's the premiere of Mare Do Well: The Movie! Or it would have been, if the whole shebang wasn't interrupted by an invasion by Tempest Shadow. Now, with all of their regular allies captured or conveniently unavailable, it's up to our regular group of semi-sociopaths (Sunset, Trixie, Lightning Dust, Gilda, Suri, Flim, Flam) to go find the hippogriffs and save Equestria. Or give up in frustration and move somewhere else instead. It could go either way, really.