Wait! Before you fire up that 3DS Ambassador copy of NES classic Metroid on your Nintendo 3DS — you know those games are available for download already, right 3DS owners? — do not put in the following password. It'll crash your 3DS!
The password I am referring to, of course, that you should never, ever put into your 3DS is:
The NARPAS SWORD password? That's probably fine. As is the famous JUSTIN BAILEY password. But the ENGAGE RIDLEY password, which would normally just make a game of Metroid unplayable beyond the opening screen, will make your Nintendo 3DS completely useless until you power cycle the thing. Exercise caution!