The Iron King is a pretty powerful opponent and he is able to match Amy blow for blow which is definitely an impressive feat of strength. He may even be stronger than Amy physically, but Amy does have the speed advantage which helps to even things out. She has a lot of experience with her Pico Pico Hammer and it has seen some cool upgrades over the years as well. I don’t believe that the Iron King would ultimately be able to keep up with her. Amy wins.