 Casey KasemShaggy Rogers / Mirror Monster (voice) | Shaggy Rogers / Mirror Monster (voice) |
| DDon MessickScooby-Doo / Scrappy-Doo (voice) | Scooby-Doo / Scrappy-Doo (voice) |
 Glynis JohnsMs. Grimwood (voice) | Ms. Grimwood (voice) |
 Susan BluSibella Dracula (voice) | Sibella Dracula (voice) |
 Patty MaloneyTanis the Mummy (voice) | Tanis the Mummy (voice) |
 Pat MusickElsa Frankensteen (voice) | Elsa Frankensteen (voice) |
 Marilyn SchrefflerWinnie Werewolf (voice) | Winnie Werewolf (voice) |
 Russi TaylorPhantasma (voice) | Phantasma (voice) |
 Frank WelkerMatches / Papa Werewolf / Well Dweller (voice) | Matches / Papa Werewolf / Well Dweller (voice) |
 Andre StojkaThe Grim Creeper / Mummy Daddy (voice) | The Grim Creeper / Mummy Daddy (voice) |
| ZZale KesslerDaddy Dracula / Frankenstein Senior (voice) | Daddy Dracula / Frankenstein Senior (voice) |
 Hamilton CampPhantom Father (voice) | Phantom Father (voice) |
 Ruta LeeRevolta (voice) | Revolta (voice) |
 Ronnie SchellColonel Calloway (voice) | Colonel Calloway (voice) |
 Scott MenvilleCadet Tug Roper (voice) | Cadet Tug Roper (voice) |
 Aaron LohrCadet Miguel (voice) | Cadet Miguel (voice) |
 Bumper RobinsonCadet Jamaal (voice) | Cadet Jamaal (voice) |
 Remy AuberjonoisCadet Baxter (voice) | Cadet Baxter (voice) |
 Jeff CohenCadet Grunt (voice) | Cadet Grunt (voice) |
 Brian CummingsFan Monster (uncredited voice) | Fan Monster (uncredited voice) |
 Linda GaryDoorbell Monster (uncredited voice) | Doorbell Monster (uncredited voice) |
