Scooby-Doo and Shaggy must go into the underworld ruled by The Goblin King in order to stop a mortal named The Amazing Krudsky who wants power and is a threat to their pals: Fred, Velma, and Daphne.
Genres: Adventure, Animation, Comedy, Family, Fantasy, Music. TMDB rating: 7.6/10. Watch free online in HD on Flash Movies.