Shaggy is turned into a werewolf, and it's up to Scooby, Scrappy and Shaggy's girlfriend to help him win a race against other monsters, and become human again.
Shaggy Rogers (voice)
Scooby-Doo / Scrappy-Doo (voice)
Googie / Repulsa (voice)
Dracula (voice)
Vanna Pira (voice)
Brunch (voice)
Crunch (voice)
Frankenstein / Skull Head / Genghis Kong (voice)
Bonejangles (voice)
Dr. Jackyll / Mr. Snyde (voice)
Mummy (voice)
Dreadonia Witch / Woman at Store (voice)
Screamer (voice)
"The Werewolf Rock" Singer (uncredited voice)