Okay, the worst attacks he has are not necessarily his blasts they he shoots, but rather him running and jumping around the arena. I found the BEST place to avoid these 'hit Megaman with my body' attacks is actually in the center of the screen. If you hang out there, you can easily jump over him if he simply runs across, but if he decides to run, and then jump or jump, and then run, you can easily circumvent him at the center of the room. It of course requires some pinpoint reflexes, but its FAR easier to avoid him there than at the sides of the room where most players might WANT to do.