Schwick´s Pet is a minor character owned by Schwick in episode Courage in the Big Stinkin' City. It's locked behind a small door in the rehearsal room, and it eats victims reducing them to bones. It's an omnivore, judging by how it eats Eustace's skin off at the end of the episode. We never see the monster, though it could be the Violin Girl as her room has a small door that could be linked to the rehearsal room. Some fans have speculated it to be the Intruder, a blobbish omnivorous creature from the Toonami (programming block on Cartoon Network) event of the same name.