Story: "Welcome to Wakanda" (Avengers: Earth's Mightiest Heroes, Ep #17)
Background: The Man-Ape challenged T'chaka to a Tribal Challenge for the throne and won thanks to a sound device given to him by Klaw. T'challa leaves Wakanda and ends up at Avenger's Mansion, where he eventually asks for help (which ended up just being a distraction to get into Wakanda). T'challa then challenges M'baku to a Tribal Challenge.
T'challa is restored as king as M'baku and Klaw were vanquished. He also learns to trust the Avengers and ends up joining their team as well.