Board Thread:Fun and Games/@comment-7823447-20130703174114/@comment-24111700-20140331010450

Omnitrix88 wrote: Diamondhead isn't indestructible, as proven when Ultimate Echo Echo was able to make him start to crack and shatter, but since my instinct says he's harder than Chromastone, that means Chromastone isn't either.

Infinite tie, as I'm too lazy to think about it too much. If forced to make a choice, I'd say after a long battle Chromastone would win, as he can fly and eject energy. To be fair, sonic waves are diamondhead's weakness which is why ultimate echo echo managed to do so much damage to diamondhead.