Scooby-Doo has encountered all sorts ... it does bring up the question over which one was the witch. The Ghost of Elias Kingston appears as the villain of "What the Hex Going On?" ...

Looking to stream Scooby-Doo! and the Witch's Ghost starring Mary Kay Bergman? You're in luck, as it's currently available on Max and Max (Via Hulu). Max: Watch for free with a subscription.