Bug: This glitch has been fixed in later versions of the game, but still works in the original NES version. When fighting the Yellow Devil, select your Elecbeam and fire it at the enemy's eye. As soon as you fire, start rapidly mashing the Select button over and over again as fast as you can till it hits. If done fast enough, the beam will instantly kill Yellow Devil in one hit.
Bug: This glitch has been fixed in later versions of the game, but still works in the original NES version. When fighting the Yellow Devil, select your Elecbeam and fire it at the enemy's eye. As soon as you fire, start rapidly mashing the Select button over and over again as fast as you can till it hits. If done fast enough, the beam will instantly kill Yellow Devil in one hit.
Trivia: Rock, Roll and Dr. Right go unnamed throughout the whole game; they are only seen at the end. (Rock goes unnamed; NOT Rockman.) The Yellow Devil, the Copy Robot, and the seven CWU-01P(s) are also unnamed in the game, although the Copy Robot can just as well be referred to as MegaMan; it's an exact copy. Dr. Wily is the only part of his name given; there's no "Albert W." The weapons are not given names either. (M stands for Magnet, and P may stand for Power or Player.).