My Little Fantendo: Crossover is Magic is a fan-fic created by no other than Sorastitch. The fan-fic follows the cross-over of the Fantendo Multiverse and The My Little Pony Universe. The plot is under tight wraps, although the author has revealed the first couple of chapter names.
It will be a lot darker than the show and most of the series's that it crosses over with. The author says he plans for some character deaths.