The Magilla Gorilla Show (1964)

S1E12 Muscle Tussle

Mushmouse is wallowing in self-pity when his cousin drops by for a visit. Once Punkin' Puss wakes from his nap, the cousins plot to let Megaton pummel him. Punkin' Puss believes that Mushmouse has finally triumphed, prompting him to leave. However, when he discovers that he’s been the target of their prank, Punkin' Puss decides to stick around in the hills to get back at them.