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.
Casey Kasem
as Shaggy Rogers (voice)
Don Messick
as Scooby-Doo / Scrappy-Doo (voice)
B.J. Ward
as Googie / Repulsa (voice)
Hamilton Camp
as Dracula (voice)
Pat Musick
as Vanna Pira (voice)
Rob Paulsen
as Brunch (voice)
Frank Welker
as Crunch (voice)
Jim Cummings
as Frankenstein / Skull Head / Genghis Kong (voice)
Brian Stokes Mitchell
as Bonejangles (voice)
Ed Gilbert
as Dr. Jackyll / Mr. Snyde (voice)
Alan Oppenheimer
as Mummy (voice)
Joan Gerber
as Dreadonia Witch / Woman at Store (voice)
