Knife Edge: Nose Gunner Cheats
This code enables a fourth difficulty which is called SUPER. When the Kemco logo is on the screen, when the game first comes on, do the following: Hold R Button, L Button, and C-Up. While holding them, press C-Right, C-Left, and B Button. If the code worked, the game will say, "All systems ready."
This code allows you to choose your starting stage in Story Mode, and Team mode. When you are on the screen where you choose your path for the stage and it shows the stage number at the top, do the following: Hold all four C-Buttons, and the R Button. While holding these, press Right, Up, Left, Down and the Control Pad.