Scooby-Doo! Meets the Boo Brothers (1987)
When Shaggy inherits an old Southern estate from an uncle, he and his sleuthing hounds take a road trip. But they don't even make it to the mansion before the haunting starts. Amid headless horsemen, walking skeletons, and a menacing butler, Scooby, Scrappy, and Shaggy get majorly spooked.
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