To stop the Amazing Krudsky from gaining power, Scooby-Doo and Shaggy go into the underworld ruled by the Goblin King; when girl-ghouls are kidnapped from their school, Scooby-Doo and Shaggy set out to find them; when Scooby and the gang go to Mexico to celebrate the Day of the Dead, they encounter the Chupacabra, who wreaks havoc during the celebration; the legendary Werewolf retires so Count Dracula resorts to kidnapping Scooby-doo and his friend...