A Pup Named Scooby-Doo - Season 2 - Eps 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.
About A Pup Named Scooby-Doo

Title: A Pup Named Scooby-Doo
First Air Date: 1988-09-10
Last Air Date: 1991-08-17
Status: Ended
Rating: 7.6/10 (from 275 votes)
Language: EN
Seasons: 4
Total Episodes: 30
Network: ABC
Genres: Animation, Mystery, Comedy, Family, Kids
Production Companies: Hanna-Barbera Productions
Synopsis
The world's favorite chicken-hearted canine, as a puppy? That's right! And the old gang is back with him. Shaggy, Daphne, Velma, and Freddy are all here as gangly kids — goofing off, solving kid-size mysteries, and having run-ins with ghouls, ghosts, and goblins.
Cast

Don Messick
Scooby-Doo (voice)

Casey Kasem
Shaggy Rogers (voice)

Carl Steven
Fred Jones (voice)

Kellie Martin
Daphne Blake (voice)

Christina Lange
Velma Dinkley (voice)

Scott Menville
Red Herring (voice)