The Magilla Gorilla Show (1964)

S1E3 Calling All Kin

Frustrated with his ongoing rivalry with Punkin’ Puss, Mushmouse enlists the assistance of his cousins to gain the advantage. Initially, Punkin’ Puss is baffled by Mushmouse’s clever tactics, but when he realizes that Mushmouse has summoned his relatives for support, he quickly decides to rally his own family to counter the challenge.