A one-hour featuring episodes of both the Scooby-Doo and Richie Rich cartoon series. Scooby and the Mystery Machine gang travel from town to town investigating reports of ghosts, monsters and other strange events, inevitably finding that the spooks and spirits are just hoaxes. Richie, meanwhile, has adventures that only happen to the richest boy in world. With his friends and his butler, he investigates problems and gets himself into situations that can only be solved by spending piles of money or using incredibly expensive gadgets.