Scooby-Doo and the Reluctant Werewolf (1988)

Summary: This made-for-TV animated feature stars only two regular members of the Mystery Machine gang: Scooby Doo and Shaggy (although Scrappy, a late addition to the series, is also present). In place of Freddy, Velma, and Daphne, we have Googie, Shaggy's girl friend. It seems that Shaggy and company are now involved in race car driving. By coincidence, in far-off Transylvania, Count Dracula is getting ready for the annual Monster Car Race -- a race that features such familiar faces as Frankenstein's Monster and his bride, the Mummy, Genghis Kong, and a pair of witches. Normally, the Werewolf is a part of the race, but he has fled this year and nothing Dracula can do will bring him back. As he desperately needs a werewolf for the race, Dracula sends the Hunch Bunch -- a pair of deformed brothers -- to America, where they transform Shaggy into a werewolf.