Board Thread:General Mega Man Discussion/@comment-72.196.108.224-20130616030147/@comment-24909822-20140506161757

Not likely, considering the Z-Knuckle was first and only used in Megaman Zero 4, and the K-Knuckle in X8. Zero was a born killer, extremely powerful in the hands, which literally nearly ripped Sigma's face off. His hands didn't glow as X's did when he burned scars into Sigma's face. Zero merely ripped the skin. An interesting theory, but most likely not so.