Skeletons are skinless zombies who are exceptional archers. They have so far only been seen in the first two Haunting movies, and have not been mentioned at all in the third Haunting movie and the Haunted episodes. However, they may still return later in the series.
Skeletons were a minor enemy in the first Haunting movie, only being seen a few times, however mentioned heaps. They were a minor enemy in the second Haunting movie as well, however were seen much more, especially in the Jungle and Desert temples, as well as the Desert biome at night.