The lovable, easily frightened Great Dane, Scooby-Doo, returns to thebig-screen when Scooby and the Mystery, Inc. sleuths confront ananonymous masked villain plotting to take over the city of Coolsvilleusing a monster machine that creates Mystery Inc.'s classic foes such asThe Pterodactyl Ghost, The Black Knight Ghost and The 10,000 Volt Ghost.Meanwhile, the gang's detecting abilities are scrutinized by relentlessreporter Heather Jasper-Howe (Alicia Silverstone), aided by museumcurator Patrick Wisely (Seth Green) and thwarted by nasty JeremiahWickles (Peter Boyle).