Things You'll Need
Instructions
Insert a memory card and the Action Replay disc into your Nintendo GameCube. Turn on your system.
Pick the "Game Select" option by using the "A" button in the main menu once the Action Replay loads. This choice is the first item on the list.
Pick a video game that you would like to enter an Action Replay code for. The potential video game choices are listed in alphabetical order and you can select any particular title by selecting it with the control stick and pressing the "A" button.
Highlight the "Add New Code" and use the "A" button to pick it.
Enter your codes one at a time by using the control stick to enter the correct letters and numbers. After each code, use the "A" button to press the "Save" button. This will save the code onto your memory card for future use.