A Pup Named Scooby-Doo Season 2 Episode 8

Terror, thy Name is Zombo (aka Roller Ghoster Ride!)

The Gang goes to the Coolsville amusement park Shaggy and Scooby are excited because they will be the first ones to ride Monster Mountain a giant roller coaster for earing the most ralfal tickets but the fun park is turning into a nightmare park because of a terrifying ghost but not just any ghost a clown ghost.