Scooby Doo parody (not crossover). Derpy and Doctor Whooves are escoting a gaint muffin on the Friendship express for the grand opening of the Cantalot Muffin Musuem. But when the prize exhibit is stolen by a vengful ghost, can they team up with Twilight, Pinkie Pie and Princess Luna to catch the Ghost and recover the muffin before its too late?
Note- whilst I am using themes and ideas from scooby doo, I am not transplanting personalities. Pinkies just as crazy, Twi is still an egghead, Luna is still best pony the princess and the Doctor and Derpy are, well, the Doctor and Derpy. However, a (very) rough guide as to who is who:
Pinkie- Shaggy
Derpy- Scooby
Doctor- Fred
Twilight- Velma
Luna- that purple vapid one
Please note that this is a rough guide, as I expect Luna to have some Fred moments and the Doctor to have some Velma moments and so forth.