Sick in bed right before the big Mystery Solvers Club State Finals, Scooby dreams about going to the competition and teaming up with fellow mystery-solver sidekicks Speed Buggy, Jabberjaw, Captain Caveman and The Funky Phantom to rescue their friends from the clutches of the demonic Lord Infernicus.
Quest roles:
Frank Welker(Scooby-Doo / Fred Jones (voice)), Gary Cole(Mayor Fred Jones Sr. (voice)), Kate Higgins(Mayor Janet Nettles (voice)), Patrick Warburton(Sheriff Bronson Stone (voice)), Jim Cummings(Captain Caveman (voice)), Tom Kenny(Funky Phantom (voice)), Rick D. Wasserman(Lord Infernicus / Boo (voice)), Vivica A. Fox(Cassidy Williams (voice))