Shaggy Rogers / Mirror Monster (voice)
Scooby-Doo / Scrappy-Doo (voice)
Ms. Grimwood (voice)
Sibella Dracula (voice)
Tanis the Mummy (voice)
Elsa Frankensteen (voice)
Winnie Werewolf (voice)
Phantasma (voice)
Matches / Papa Werewolf / Well Dweller (voice)
The Grim Creeper / Mummy Daddy (voice)
Daddy Dracula / Frankenstein Senior (voice)
Phantom Father (voice)
Revolta (voice)
Colonel Calloway (voice)
Cadet Tug Roper (voice)
Cadet Miguel (voice)
Cadet Jamaal (voice)
Cadet Baxter (voice)
Cadet Grunt (voice)
Fan Monster (uncredited voice)
Doorbell Monster (uncredited voice)