Piny began as a character on the show Animaniacs. He and Brain were later given their own show, Pinky and the Brain.
A laboratory mouse, His genes have been spliced, He's insane. He lives in a cage at Acme Labs, with the Brain. Brain comes up with a new way to take over the world every night, and every night they fail. Occasionally Pinky is to blame for the plan failing. He once fell in love with a horse.