Given all the disasters that have recently befallen Ponyville Princess Luna decides that the town could use more fun and introduces a new holiday she learnt of from her alternative universe self, Nightmare Night.
A magical mishap results in most of the mane 6 and many other ponies taking on the personality and characteristics of their costumes.
The chapters can be read in any order, the first lays out the problem and fixes it while the others show what was happening to other characters at the same time.
Two mares and a rabbit walk into a haunted house - Trixie and Twilight have to team up to try and stop the costume spell from destroying Ponyville aided by Pokey whose been turned into a certain wise cracking rabbit.
Heroes - Snips and Snails in the guise of their favourite superheroes have to save Raindrops from a pack of Diamond Dogs.
The Bat the Cat and the Plant - Cheerilee is turned into the jewel thief Catmare and Carrot Top into Poison Ivy can the Dynamic Due of Heavy Roller and Scootaloo stop their villainous rampage?
The Case of the Dangerous Duo - Lyra and Bonbon are changed into the gangsters Bonnie and Clyde, but don't worry Sherclop Holmes and Watson (Ditzy and Dinky Doo) are on the case.
Metal Beyond Words - A quick epilogue I put together because a few people asked for it.
Set in RainbowDoubleDash's Lunaverse.
My entry to the Nightmare Night writing challenge.