The Ghoul Gator is the titular main antagonist of The Scooby-Doo Show episode, "The Gruesome Game of The Gator Ghoul".
"The Gruesome Game of The Gator Ghoul"
In "The Gruesome Game of The Gator Ghoul", The Gator Ghoul terrorized Ma and Pa Skillett's showboat till he was unmasked as Alice Dovely their secretary and bookkeeper. who dressed up as the Gator Ghoul for revenge after being fired by Kookie Koka.
Scooby-Doo and The Cyber Chase
The Gator Ghoul Later appears in the Scooby-Doo movie, Scooby-Doo and The Cyber Chase. He was the fourth monster, along with Tar Monster, both the real and cyber gang encountered while running from the Phantom Virus, when the real gang thought that the monster were just people in disguise, both Scoobys tried to take his face off only to realize that they were all real monsters. He was first seen chasing the Freds on a rollercoaster, only for them to get off when they saw the rails of the ride bent and he was thrown off. He next went on a bumper car ride, but both Freds forced him to drive into the wall and was thrown into a dunk tank where real Fred threw his shoe into the bullseye causing the platform to drop and bonk the gator on the head, knocking him out. He returned one last time, along with the other monsters to capture the cyber gang, only to disappear after the real one got the Snax box.