Detour to Darkness

Sora, Donald, and Goofy crash land on a world that is plagued with Heartless and a group of people called Team Rocket, and in the middle of everything, they meet a boy that can't speak. Red just wants to collect the last few gym badges he needs to challenge the Elite Four and become the champion - all he needs to do is make sure his heart isn't stolen. Easier said than done.