Scooby-Doo and Scrappy-Doo: A genetic researcher uses a formula to create monsters like a vicious lamb and a gigantic monstrous mouse. At first the gang thinks they are harmless then when they see the results they decide to stop the researcher. Along the way Shaggy and Scooby end up taking the formula.

Starring:

Casey Kasem, Don Messick, Frank Welker, Heather North, Lennie Weinrib, Patricia Stevens

Genre:

Adventure, Animation, Comedy, Family, Mystery