Most of his body is covered in green fur. He has yellow eyes and a skull-like face.
It's personality is similar to that of a Gremlin as it likes to seemingly sabotage the park rides.
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The monster first sabotage a hang-gliding ride, which cause the riders to crash into the water.
While Fred, Daphne and Velma went on the Sky Ride, the Roller Ghoster broke the control panel, which cause the fan to slow down. The trio were saved when Daphne tossed her belt into the fan, shutting it down.
It left behind a wrench he used to derail the Rocket Coaster.
After chasing Scooby and Shaggy through the skateboard park, he crashed into a tent. While the clues the gang found made it seem that Chris was the culprit, it was actually her sister Terry. She wanted to take over the park, because she was jealous of her sister taking credit for her work. And she pretended to sabotage the rides so no one would get hurt.
- In Scooby-Doo! And The Goblin King, a blue version of the Roller Ghoster was seen in the monster bar.