Explaining Cartoons on Instagram: "Muscles is Jerry’s tougher, bulked-up cousin who appears in the 1951 short Jerry’s Cousin. Unlike Jerry’s sneaky style, Muscles relies on pure strength and total fearlessness, walking through Tom’s traps like they’re nothing. He barely talks, but his presence does all the talking. He became iconic because he’s the ultimate “don’t mess with my family” character. Every gag shows how effortlessly he overwhelms Tom, from bending metal to flicking him across rooms.