While this may look like a blow out on paper, I would advise you not to underestimate Mega Man’s abilities. In the manga version of his games, the Blue Bomber’s speed and strength were greatly augmented. Not to the point where they can beat Naruto in his Chakra Mode or any of his final forms, but Mega Man could definitely make this a fight. Naruto’s Rasengan variations will still prove to be too much for Mega Man though and the robot probably couldn’t copy the chakra attacks as his body likely does not possess it. Naruto wins.