Scooby-Doo and the Ghoul School

The name of this movie is Scooby-Doo and the Ghoul School released in 1988-10-16 and it's main theme is Scooby, Shaggy and Scrappy Doo are on their way to a Miss Grimwood's Finishing School for Girls, where they have been hired as gym teachers. Once there, however, they find that it is actually a school for girl ghouls..