Megaman SF hasn’t fought in a while, but this has not dulled his skills. He’s still one of the strongest combatants around and his speed can match up with the best fighters out there. King Dedede isn’t known as a speedster by any stretch of the imagination, but he has a good hammer. It should take a full slice from Megaman’s sword to destroy it and a single punch to take out the King. Megaman SF wins.