Nami has the advantage at a distance, Chopper at close range. But with his beast form, Chopper is virtually untouchable in this case.

i just really hate chopper

Traps, traps, traps. Nami has seen Chopper's different forms--she'd set a trap and knock him out fairly easily. Even if he used his mammoth form, she's probably seen it enough times to know his movements and be able to hide until it wears off. Then it'd be game, set, and match.

Although, if she tripped while running away, Chopper would catch up and she'd be screwed...yeah.

i will vote for chopper.......he he heeh

All Nami does is stand there and swing around a stick. Yes I'm aware that heat ball and so on come out of this said stick but, Chopper has her beat by flexibility and endurance.

chopper can control his monster point and transform into all his other forms without problem so nami with her weather balls doesn't really stand a chance

I'm not voting for that shit head so Chopper gets my vote.

Nami easy.