Schwick (Full name Buschwick) is a giant cockroach that appeared in Courage in the Big Stinkin' City.
He is a shifty urban roach with a suspiciously repetitive speech pattern. He lures people into the basement with misleading signs and promises of concessions, and then has them eaten by a mysterious creature locked up in the room wall. The exact nature of this process is unknown, though he has connections in creepy, abandoned areas that perhaps make it better left unsaid. He is very argumentative.
Originally from the town of Bushwick, Schwick relocated to the city and became an infamous criminal wanted for association with the Evil Package. After luring a number of people to their bony demise, he met performer Muriel Bagge and her family. Troubled by a plea for help written on the window that could alert the Bagges of his plan, he requested that Courage claim the package, without the interference of cops. When he returned, the content of the box-- a squeegee-- was bent, and so he angrily chased the dog to the stage where he was caught and arrested by the police (Ep.15-2).
*He is one of the antagonists featured in the opening credits of Season One.