He-Man and the Masters of the Universe (1983)

S2E63 The Games

The Vendari, an alien species unfamiliar with the concept of evil, arrive on Eternia to observe the battle between good and evil and determine which is more powerful. They choose Fisto to represent the forces of good and Spikor for evil, setting them up to compete in various challenges. However, Fisto's chances of winning are jeopardized by Skeletor and his minions, who resort to underhanded tactics to ensure Spikor comes out on top.