Mega Man 2: The Power Fighters

Like The Power Battle, each character has an epilogue once the player beats the game. However, in The Power Fighters, each combination of two characters in co-op play also has their own unique epilogue. The epilogues are more detailed than those of its predecessor and have more to do with past and future Mega Man games, providing vague explanations regarding characters and canon, most notably the Evil Energy incident from Mega Man 8 and how Dr. Wily created Zero from the Mega Man X series