Marvin the Martian is a former foreign exchange student from Mars who attended Daffy's high school. Marvin is still a nerdy misfit with a laser pistol. He owns a martian dog, K-9, and martian slaves, The Instant Martians.
Marvin the Martian first debuted in the episode, Members Only, where he sang his own Merrie Melodie about how being another planet inhabitant is hard because people will think you are a misfit. The song is called, I'm a Martian. In the song, Marvin wants to be friends with everyone and says he's a nice guy.