Okay I have noticed from reading these stories that W'kar can regenerate his control medal after it's been blown in half. So that brings me to this question how much of the control medal needs to be left in order to regenerate itself? To clarify how big of a piece of the control medal needs to remain in order to be regenerated.

Sorry if this is confusing I just can't be anymore specific.

I once said as a joke that based on Fighter Guyver, he'd need 99.9% of his control medal to be destroyed to not regenerate.

Seriously, I think (this is based off of my fanfic, but it applies here) that the reason the control medal regenerates is partly becasue of the processors inside of it, and regenerative properties the control medal is composed of. I think if you were to destroy the processors inside the control medal, you'd essentially have an empty control medal, with no proccessors inside. But then again, the processors could regenerate maybe because of backup systems of some sort. I'm saying this because even Fighter Guyver was somehow able to merge with a piece of W'Kar's Control Medal.

FIghter guyver was able to merge with the w'kars c-medl because Jarrod had bits of Greg's dna in him.