Instructions
Plug the Gameshark cartridge into your game console, and plug a game into the top of the Gameshark cartridge. Turn the console's power on.
Click "Select Cheat Codes." Locate the game with the code you want to alter and select it. Highlight the code you would like to change and choose "Edit."
Move the cursor to any point in the first line of code. Push the "Down" button on your controller's directional-pad. Enter a second line of code to the cheat. Press "Start" and choose "Accept."
Choose "Activate Cheat." Back out to the main menu and choose "Start Game with Cheats" to ensure your cheat was entered correctly and is working properly.