I remember the original Scooby Doo cartoons.  In my head, the villain was always somebody pretending to be the Ghost of somebody. They didn’t chase Blackbeard, they chased the ghost of Blackbeard.  They didn’t have an alien space pilot, they had the ghost of an alien space pilot.  It was kinda weird.  I believe I recall that one villain was the actual grandson of Dr. Jekyll, who turned into the ghost of Mr. Hyde, which didn’t make any sense at all.

My favorite episode, though, was the one with the robot, which I think was actually a robot, and not the ghost of a robot.  I would have been just as happy if it had been the ghost of a robot, though.

And then, they invented Scrappy Doo.  Too bad.