Okay- so I may not finish this- but if you watch Duraludon closely both G-Max and normal forme have Bright Yellow Dots inside of it...
So I Begun thinking: Why it's One Percent encounter in the Wild of the Mountains- and One Commonly near Giant's seat, is because the Duraludon we see is just a Shell created by a Smaller Pokemon!
A Smaller pokemon with very thin Nails, and a Welding torch's control of fire