Instructions
Use a 810 or 880 to start the code if you wish to create an effect. Use D00 to modify design aspects of the game.
Determine the next three digits for how the code will work in the game. These digits will also be responsible for what aspect of the game the code will appear.
Choose two digits that will determine what the codes is used for. Use 3C for altering player health and F5 for altering enemy health. Use FF for ammo, F3 for weapons. and 75 for maps.
End the code with the final four digits. These digits don't have any specific purpose to them, other than to complete the code. Use 0000, 0001, 0030, 0007, 3F80, 3C80, or a sequence of your own.
Load the code into your GameShark the next time you start your console.