Ghost Duck

The Ghost Duck is an incorporeal ghostly entity in the form of a duck wearing a pickelhaube that was born from Grim's good dreams. Whenever Grim has a good dream, a portal opens in the back of his head connecting into the dream world which allows nightmare creatures to escape into the real world and torment countless victims one at a time. The Ghost Duck was one such creature born from Grim's dream about having a monster wife and cozy home.

The Ghost Duck tormented the people of the real world by making raspberries (fart noises) and getting them into trouble one at a time and eventually landing the majority of Endsville in prison, and this endeavor was made more easy by the fact that it can only be seen by its current victim.