In 200X, a super fighting robot named Mega Man was created. Dr. Light created Mega Man. To stop evil desires of Dr. Wily. However, after Dr. Wily's defeat, Dr. Wily created 8, of his own robots to counter Mega Man...

Dr. Wily has gotten jealous of Dr. Light and 6 of his robots and has reprogrammed them to take over the world, Mega Man (which is you basically) volunteered to become a super fighting robot to stop Dr. Wily.