Scooby-Doo And The Goblin King (2008)

The Mystery, Inc. gang goes to the annual Coolsville Halloween carnival on Halloween night. While there, they encounter the resident magician “The Amazing Krudsky” (voiced by Wayne Knight) who refuses to allow Scooby to see his show after an accident. In retaliation, he and Shaggy expose Krudsky as a fraud during one of his acts, causing his audience to walk out and Krudsky to swear revenge on the duo. The gang gets thrown out of the carnival and decide to go trick-or-treating instead. In his tent, Krudsky reveals his desire to become a real magician. The Fairy Princess Willow (voiced by Hayden Panettiere) enters Krudsky’s tent and causes Krudsky to notice an entry about the Goblin Scepter in a spellbook, which can be combined with fairy magic to control Halloween.

Krudsky then gets an idea to obtain the scepter and rule the world with it. Willow decides to toy with him, but knocks herself out; Krudsky sees that she is a fairy and absorbs her magical powers, thus becoming a real magician. Meanwhile, Shaggy’s and Scooby’s last stop trick-or-treating is a spooky-looking house which claims to be a “genuine magic shoppe”. Once inside, a thunderstorm begins, frightening them. The proprietor of the magic shop Mr. Gibbles (voiced by Wallace Shawn) reveals to the duo that magic really does exist and sings a song. Krudksy enters the shop chasing Willow, captures her, and then turns Gibbles into a rabbit and steals the magic equipment before leaving. Mr. Gibbles explains Krudsky’s plan to Shaggy and Scooby and shows them a vision of Krudsky turning their friends into monsters, horrifying the two.