The Box Demon is a minor character who appears in the episode Shirley the Medium.
Appearance[]
The Box Demon was hiding and living in Horst's money box. Courage found the box before Eustace opens it, even after Shirley, Courage, and Horst warned him not to. Shirley forces the demon back into the box by shutting the box on lid, saving Muriel and Eustace.