After playing around with this thing, and comparing, I'm absolutely sure they copied the Aoshima Endoskeleton. Certain things like the shoulder blades having springs are good indicators. Every single detail that's in the Aoshima is in the NECA, even the tiniest little marks and lines. They removed all the die cast, and added light up eyes, and moving hip joints. It is really pretty cool, it can stand on it's own, but only in a few poses, the non adjustable rear foot ball thing is to blame. For $40 though, this is quite a bargain.