Skeleton is an enemy that first appeared in Ninja-Kun.
Compared to Liondances, Skeletons are relatively easy. They behave a lot like Lightning Boys, and are capable of throwing fast swords in rapid fire. Don't stay on the same level as Skeletons for long, since they can easily overwhelm you with their weapons. Stay on the move, and fire at Skeletons while you jump or fall to keep from getting hit.