Frank Welker

Matches / Papa Werewolf / Well Dweller (voice)

Scott Menville

Cadet Tug Roper (voice)

Pat Musick

Elsa Frankensteen (voice)

Russi Taylor

Phantasma (voice)

Bumper Robinson

Cadet Jamaal (voice)

Aaron Lohr

Cadet Miguel (voice)

Brian Cummings

Fan Monster (uncredited voice)

Casey Kasem

Shaggy Rogers / Mirror Monster (voice)

Don Messick

Scooby-Doo / Scrappy-Doo (voice)

Glynis Johns

Ms. Grimwood (voice)

Susan Blu

Sibella Dracula (voice)

Patty Maloney

Tanis the Mummy (voice)

Marilyn Schreffler

Winnie Werewolf (voice)

Andre Stojka

The Grim Creeper / Mummy Daddy (voice)

Zale Kessler

Daddy Dracula / Frankenstein Senior (voice)

Hamilton Camp

Phantom Father (voice)

Ruta Lee

Revolta (voice)

Ronnie Schell

Colonel Calloway (voice)

Remy Auberjonois

Cadet Baxter (voice)

Jeff Cohen

Cadet Grunt (voice)

Linda Gary

Doorbell Monster (uncredited voice)

Charles August Nichols

Director

William Hanna

Executive Producer

Joseph Barbera

Executive Producer

Glenn Leopold

Writer