The Ghostly Ghoul is a Ghastly Guest - S1.E2

A giant and scary monster shows up to stay at Shake, Rattle, and Roll's haunted inn. When he scares away the other guests and creeps out the ghostly trio they attempt to scare him away. When their attempt fails they are more than happy to trick Sidney into sucking up the monster with his ghost vaccum. This brings back their ghostly guests and all is well.