Scooby-Doo / Rudy / Fred / Nefario (voice)
Daphne / Daisy / Musketeer 1 / Olive (voice)
Shaggy / Craggly / Captain Cutler (voice)
Velma / Helga (voice)
Coco Diablo (voice)
Esteban / Mr. Wickles / Cat Man (voice)
Shady Guy / Charlie Humdrum / Hank (voice)
Trevor Glume / Farmer (voice)
Library Kid / Superhero Girl / Musketeer 2 (voice)
Warden Collins / Harry the Hypnotist / Inspector (voice)
Prisoner Costume Teen / Superhero Boy / Musketeer 3 (voice)
Prison Woman / Dinosaur Kid / Monster Kid (voice)
Librarian / Superboy (voice)
Sheriff / Henry Bascombe / 10,000 Volt Ghost (voice)