Catman is the superhero alter-ego of the late Adam West. He lived at his Stately Manor, but currently lives at "It's a Wrap" Retirement Community, both in Dimmsdale. He is a good friend (as well as a legal guardian) of Timmy Turner. He is a parody of the 1960s Batman who was portrayed in live action by the great Adam West and of course directly based after Catman, another hero made by DC comics but had become less prominent superhero and hardly known nowadays to the people of Dimmsdale.
He turned muscular when he wishes to be the real Catman in Cat n Mouse.