Frank Welker
Scooby-Doo / Fred Jones (voice)
Acting
Matthew Lillard
Shaggy Rogers (voice)
Acting
Grey DeLisle
Daphne Blake (voice)
Acting
Mindy Cohn
Velma Dinkley (voice)
Acting
Mark Hamill
Zip Elvin (voice)
Acting
Diedrich Bader
H.A.M. (voice)
Acting
Malcolm McDowell
Sly Baron (voice)
Acting
Fred Tatasciore
Hudson Baron / Alien (voice)
Acting
Jennifer Hale
Shannon Lucas / Ridley / Launch Manager (voice)
Acting
Jeff Bennett
Colt Steelcase (voice)
Acting
Kevin Michael Richardson
Uvinous "U-Boat" Botango / Drake (voice)
Acting
Eric Bauza
Clark Sporkman (voice)
Acting