Creaking Skull

"AAAAAAAAAAAHHHHHH!!!! Oh no, it's a Creaking Skull! I will really, and definitely destroy this guy before this one could kill us all! Now what?! Well, I can't let this thing here end up like that!"

--Su Ji-Hoon, A Skull That Creaks

The Creaking Skull is a boss in Castlevania: Aria of Sorrow. It is a giant corpse whose body has collapsed under its own weight.

Origins
The Gashadokuros are spirits that take the form of giant skeletons. They are fifteen times taller than an average person and said to be created from the amassed bones of people who died of starvation.