Much of Kim Deitch's work deals with the animation industry and characters from the world of cartoons. His best-known character is a mysterious cat named Waldo, who appears variously as a famous cartoon character of the 1930s, as an actual character in the "reality" of the strips, as the hallucination of a hopeless alcoholic surnamed Mishkin (a victim of the Boulevard of Broken Dreams), as the demonic reincarnation of Judas Iscariot; and who, occasionally, is claimed to have overcome Deitch and written the comics himself. Waldo's appearance is reminiscent of such black cat characters as Felix the Cat, Julius the Cat, and Krazy Kat.