During their epic battle on Earth, Vegito and Majin Buu are transported to a strange dimension. The world is littered with delicious looking ponies, perfect for Buu's sweet tooth. Vegito must return to his planet. Oh and there's some ponies to save too. That's cool.
(Amazing what boredom and writer's block can do to you XD)
(Like, hate or whatever, I'm having too much fun)