The Gremlin is a Gremlin that Bugs fought in the cartoon Falling Hare. In the end he actually succeeds at defeating Bugs Bunny. This makes him one of only two characters to do this, the other being Cecil Turtle. Unlike Cecil, though, the gremlin is clearly the antagonist, similar to Elmer Fudd.
He also appears in the Tiny Toon Adventures episode Journey To The Center Of Acme Acres, voiced by Don Messick. He also made a brief cameo in the episode of the Animaniacs Plane Pals as a passenger.