 She also appeared in cameo roles in other cartoons "Puss Gets the Boot" (1940), "Puss n' Toots" (1942), "Baby Puss" (1943), "The Million Dollar Cat" (1944), "Casanova Cat" (1951), "The Missing Mouse" (1953), "Haunted Mouse" (1965) and "The Brothers Carry-Mouse-Off" (1965).Muscles is Jerry's cousin and a mouse with incredible strength.In "Jerry's Cousin" (1951), Muscles appears to hate cats, including Tom.