|This needs a stretch.|
The Zombies were three minions from the grave.
They are nearly bald and have pale green or purple skin. They wear tattered clothes, some of which have begun to fall apart.
They make mumbling noises frequently. Unlike one would expect for zombies, they walk rapidly and make quick gestures.
The 13 Ghosts of Scooby Doo
They were hired by Bogel and Weerd to stop Daphne Blake, Shaggy Rogers, Scrappy-Doo, Scooby-Doo, and Flim-Flam from finding the Chest of Demons. In exchange for their services, they were each given tickets to Boris Kreepoff's TV show. Film-Flam tricked them into leaving the graveyard by offering them a tour and leading them into a bus.