I think his weakness, as far as combat goes, is his Points.
I agree. That's what I really meant in saying that he relies on the rumble ball too much. He needs to learn how to fight with a human body, just fighting in general, and the more the better. He's got to stop relying on his transformations and just scrap with his knuckles and knees!!
the most impressive thing I think he did was when he mauled Hilruk. Maybe he's too domesticated or human.
What I'd give to see THAT side of Chopper again. I could see Chopper shit-kicking all the CP9 guys with his "beast" totally exposed *refers to Sabret00the's ava. He's got to take a page out of Wolverine's (X-men) book for that. I mean he SUPPOSEDLY has super strength, heightened senses, animal instincts, and all he's gotta do is put a little anger in his head to become a real fighter.