The Ghostbusters have taken on a hundred foot Marshmallow Man, the Boogeyman, and Cthulhu. But are they prepared to take on the dark ghost of an evil king that once terrorized a kingdom located in a land of magical talking ponies? MLPxReal Ghostbusters crossover.
When the ghost of King Sombra haunts the Crystal Empire, the girls have no idea how to handle an entity like that. So who're they gonna call?
The Ghostbusters are back and ready to protect Equestria from the ghost of Luna's darkest side that's back and out for vengeance.