Mega Man 2

In the year 200X (the first decade of the 21st century), a super robot named Mega Man was created by Dr. Light to stop the mysterious evil genius Dr. Wily's ambition to conquer the world in Mega Man. However, one year after his defeat, Dr. Wily returns with eight of his own combat robots to challenge Mega Man.

Mega Man, learning this, set out to defeat the eight Wily Numbers which Dr. Wily had created, having to traverse their respective stages first. After Mega Man defeated these robots, Dr. Wily fled in his flying saucer to his fortress, the Wily Castle. Eventually, Mega Man made his way to the heart of the castle, where he once again fought the eight Wily Numbers as well as the Wily Machine 2.

Dr. Wily fled Mega Man once again, this time escaping to a damp, moldy cave underneath his castle. Here, when Mega Man confronted him, Dr. Wily seemingly turned into an alien. After a fierce battle between Mega Man and the Alien, it is revealed that the "Alien" was actually a hologram being controlled by none other than Dr. Wily. The evil doctor, having no means of escape, begs Mega Man for mercy, and the world was rid of evil once again.