I truly don't know what this does but a few years back I was playing this game on SNES, and I was at bowser's castle, and while I was running across a bridge and out of nowhere I picked up a key!!! I was like WHAT? So I couldn't find what to do with it so I just carried it with me through the level and never found a lock. So I had to drop it before time ran out. So if ANYBODY knows anything about this please please please comment. Thanks.