Instructions
Connect your Action Replay device to your computer via the USB cord that comes with the device.
Open the "Action Replay Code Manager" software that comes packaged on a CD with the device. The program will automatically detect your connected Action Replay card.
Right-click in the "My Codelists" panel at the bottom-right of the screen.
Click "Add new cheat." A small window will appear.
Give the cheat a name and enter the wild Pokemon modifier code carefully into the cheat input window. The code should fit into the box with several characters to spare.
Press "OK" to close the window. The changes will automatically be saved and uploaded to your Action Replay card.