Charmed skeleton

Charmed Skeletons are skeletons that where Charmed by an Dark Wizard of Witch. They where in the Shrieking Shack, and attacked everybody they see, and trow with bones, possible of themself. Lord Voldemort ussed them in the Duel in Little Hangleton.

Guarding the Shrieking Shack
The Charmed Skeletons are guarding the tunnel from the Whomping Willow to the Shrieking Shack. When Harry Potter and Hermione Granger want to save Ronald Weasley of Sirius Black in 1994, there are many skeletons that attacked this two.

Duel in Little Hangleton
After the Return of the Dark Lord in 1995 used Lord Voldemort some death peoples to make skeletons of. The skeletons have to attack Harry Potter, but Harry used simple spells to defeat them.

Appearances
Harry Potter and the Prisoner of Azkaban (video game) 

Harry Potter and the Goblet of Fire (video game)