Charlie was one of the ghosts that appeared in "Ghoul Fools." He resembles a cycloptic skeleton. During the song, he states that the crew sleep in coffins and use spider webs as pillows. He also tells Lord Poltergeist that their head gasket is broken and they need a new one. Later when they replace it, the house boat starts breaking down. Poltergeist asks what's wrong, Charlie tells him that the engine is on fire before it blows up. Charlie also reappears in the episode "Séance Shméance," as a ghost returning to Rusty Rickets, and haunting the Krusty Krab.