Tim Curry (Goblin King and Werewolf Bouncer) voiced Ben Ravencroft in Scooby-Doo and the Witch's Ghost (1999). He was offered the role of Emile Mondavarious in the first live action Scooby-Doo (2002), but turned it down because the movie featured Scrappy Doo, his least favorite character.
This is the first Scooby-Doo animated movie to be made without co-creator Joseph Barbera, who died on December 18, 2006.
Most of the ghouls and monsters in the tavern are identical to the disguises used by numerous villains-of-the-week that Mystery Inc. met between 1969 and 1984. Ironically, their lookalikes in this movie are mostly nice people, despite being real monsters.
A carnival booth offers prizes of toys of Scrappy-Doo, Scooby's nephew in shows made between 1979 and 1988. This is the first acknowledgment of Scrappy in the Direct-to-Video Scooby-Doo movies.
Mystery Inc.'s hometown is confirmed as Coolsville on the carnival sign.