Hmm...All my Machamps are on Emerald, I would have to migrate them...but if close combat is only learned by breeding, I can breed an adamant one for you but it might take a few tries...you want me to? I can message you when I get it...or I can trade you something else.
I have a few Machamps, not sure what their move sets are, but I can swing by the move tutor and get everything in order if need be. Is there are special nature you are looking for?