Suggested by Destroyer Copperhead has a gun and his armor is actually bullet proof so you don’t want to count him out so quickly. That said, he would eventually fall here. While he can potentially stay away from Kumonga for a while, he doesn’t have any real way to injure the Kaiju. So ultimately he would just be squashed at some point and then that would be all over for him. The size difference is crazy here and Copperhead isn’t durable enough. Kumonga wins.