Scooby-Doo and the Ghoul School (1988)

While working as gym teachers at an all-girls finishing school, Scooby-Doo, Shaggy and Scrappy-Doo get tangled up in a monstrous mystery.

Director:

Cast: Remy Auberjonois, Susan Blu, Hamilton Camp, Jeff Cohen, Glynis Johns, Casey Kasem, Zale Kessler, Ruta Lee, Aaron Lohr, Patty Maloney, Scott Menville, Don Messick, Pat Musick, Bumper Robinson, Ronnie Schell, Marilyn Schreffler, Andre Stojka, Russi Taylor