M.U.S.C.L.E. (1983)

An animated adaptation of the superhero-parody manga series "Kinnikuman" (1979-1987) by the creator duo Yudetamago. The inept superhero Kinnikuman/Suguru Kinniku finds out that he is a humanoid alien from the planet Kinniku. He is actually the planet's long-lost prince, but he must prove himself worthy of the throne. To do so he enters wrestling competitions, where he has to face rival superheroes and super-villains. Thankfully, Suguru has an actual talent for befriending his former foes.