Butch is the main antagonist of the animated series Tom and Jerry. He is a black and white alley cat who made his first appearance in the Tom and Jerry series in the 1943 short, Baby Puss alongside Topsy and the already-established Meathead. His character, however (along with the character of Toodles Galore), first appeared in the 1941 MGM short The Alley Cat, directed by Hugh Harman. Butch is the leader of the alley cat bullies who usually help Tom catch Jerry (although a very few times, he does however become enraged when Tom's offense between him and Jerry has gone far enough).
In his first appearance, however, Butch was an antagonist, tormenting Tom after Tom's young girl owner treated him like a baby—to the point of dressing Tom up in a diaper, a bonnet, and pink paw mittens. Thus costumed, Tom couldn't help but be a figure of fun—both for Butch and his gang, and for Jerry. Butch also battles with Tom over Toodles Galore and her affections in a couple of shorts including the 1946 short, Springtime for Thomas and the 1951 short Casanova Cat.