Suggested by Destroyer The Crimson Dragon was a pretty cool final boss for the Megaman SF series. He may have come out of nowhere to an extent, but it was still pretty climactic. That being said, Rayquaza has his Mega mode and even his normal form is already fairly strong and fast. The Crimson Dragon is no slouch with his array of energy blasts, but Rayquaza is just more versatile with his attacks. He is also quicker and has more battle experience. Rayquaza wins.