While the "JUSTIN BAILEY" code is meaningless, Metroid does have an actual pre-programmed "cheat" password in it: NARPAS SWORD0 000000 000000 . It was intentionally placed into the game (src: http://metroid.wikia.com/wiki/Narpas_Sword ), and it gives you infinite energy and other powers you can't get conventionally or with any other (generated) password.