Warp Code Warning

From Glitches

From the game Crystalis for the NES.

Hold A and B on controller 1 and then push A on controller 2 to warp. Each time you do this, the game will cycle you through a distinct set of locations. This is most likely something that was intentionally put in so the programmers could easily check areas of the game, but if you use this code while in the final tower to warp out to someplace else and then save, you will not be able to get back into the flying tower to complete the game.

Taken with permission from Flying Omelette.