While on their journey across different worlds, to defeat the Unversed, Terra, Aqua and Ventus all end up in Equestria. While they are here, they will fight against the Unversed, and help the inhabitants of this world with their problems. However, they will also all learn important lessons about themselves that will make them stronger as a team and strengthen their friendship with one another.

My Little Pony: Friendship is Magic is copyright of Hasbro
Kingdom Hearts is copyright of Disney, Square Enix, and Tetsuya Nomura