The disco skull is a disco ball in Spooky Island. It's a disco ball shaped like a human skull, with spikes protruding from it. The disco skull is used around Dead Mike's. Later, as part of Mystery Inc.'s planned to defeat the demons of Spooky Island, they took it down and set it up in the caverns. The plan was after they used some pulleys to tip over the vat, Daphne would open the air vents from the outside and release the disco skull; the sun light would reflect off the disco skull...
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