Nami may have her weather staff, but I don’t believe that it will be enough to stop Waluigi. Trust me, that’s pretty surprising since it’s not every day that a Mario character can defeat an anime warrior. Waluigi’s access to giant mushrooms and stars will be enough to give him an edge. Nami just can’t defend against that! Waluigi wins.
Update! Nami can take this with her upgraded weather tempo. Nami wins.