Frank Welker
Scooby-Doo / Rudy / Fred / Nefario (voice)
Acting
Grey DeLisle
Daphne / Daisy / Musketeer 1 / Olive (voice)
Acting
Matthew Lillard
Shaggy / Craggly / Captain Cutler (voice)
Acting
Kate Micucci
Velma / Helga (voice)
Acting
Myrna Velasco
Coco Diablo (voice)
Acting
Dee Bradley Baker
Esteban / Mr. Wickles / Cat Man (voice)
Acting
Jeff Bennett
Shady Guy / Charlie Humdrum / Hank (voice)
Acting
Anthony Carrigan
Trevor Glume / Farmer (voice)
Acting
Erin Fitzgerald
Library Kid / Superhero Girl / Musketeer 2 (voice)
Acting
David Lodge
Warden Collins / Harry the Hypnotist / Inspector (voice)
Acting
Lara Jill Miller
Prisoner Costume Teen / Superhero Boy / Musketeer 3 (voice)
Acting
Candi Milo
Prison Woman / Dinosaur Kid / Monster Kid (voice)
Acting
Jenelle Lynn Randall
Librarian / Superboy (voice)
Acting
Kevin Michael Richardson
Sheriff / Henry Bascombe / 10,000 Volt Ghost (voice)
Acting