What's interesting about this formation has something to do with the weapons. As you can see in the image, you'll notice that Wild Zyuoh King's weapons are attached to the mecha's legs, and we see the Wild Zyuoh King holding the Kuma Axe, forming the Wild Zyuoh King + Kuma Axe formation. It is safe to say that Wild Zyuoh King can switch weapons found in its leg.
[Source: HeroShock]