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)

Mimi Seaton

as Screamer (voice)

Sven Libaek

as "The Werewolf Rock" Singer (uncredited voice)