Everybody loves amusement parks, unless they're haunted. In Scooby's Fun Zone, Scooby-Doo, Shaggy, and Scrappy-Doo pit their wits against a muscle-bound strongman. The crew attends a carnival at their Central High alma mater and loses their science teacher, Mr. McDrabble. Finally, the gang visits a state fair and dreams of returning to the present when they lose Daphne in an automated house of the future in High-Tech House of Horrors.