Charlie is one of the ghosts who appears in the episode "Ghoul Fools." He also appears in the episode "Séance Shméance." In "Ghoul Fools," he was part of Lord Poltergist's crew (originally on the Dutchman's crew) but now works in the engine room on the Haunted House Boat where eventually the engine sets on fire and explodes because it was not a good head gasket.
He is a skeleton ghost that has one eye in the center of his face and wears a purple bandana with light blue polkadots on his head.
During the song, he states that the crew sleeps in coffins and uses 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 houseboat starts breaking down. Poltergeist asks what is wrong, Charlie tells him that the engine is on fire before it blows up.
He appears as a ghost returning to Rusty's Rib Eye, and haunting the Krusty Krab.
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