Overview
Scooby-Doo! and the Goblin King is a 2008 direct-to-DVD animated comedy horror musical film, and the twelfth in the series of Scooby-Doo direct-to-video films produced by Warner Bros. Animation (though it used a Hanna-Barbera logo at the end of the film). It was dedicated to Paulette Oates, who helped resurrect Warner Bros. Animation in the late 1980s. All the main voice actors of Mystery, Inc. reprise their roles. The DVD was released on September 23, 2008. This is the first Scooby cartoon produced entirely without either one of the original producers, William Hanna and Joseph Barbera.
This film calls back to the shared premise of The Boo Brothers, The Ghoul School, and The Reluctant Werewolf films from the late 1980s, where the fantastical elements of the story are genuine, and Scooby and Shaggy alone discover and befriend an entire society of supernatural beings.
Plot
The Mystery, Inc. gang goes to the annual Coolsville Halloween carnival on Halloween night. While there, they encounter the resident magician "The Amazing Krudsky" who refuses to allow Scooby to see his show after an accident. In retaliation, he and Shaggy, who feel that Halloween is the one night of the year where the usual scares have to be fake, 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 enters Krudsky's tent and accidentally 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.
From Wikipedia (CC BY-SA 4.0).