Instructions
Use the arrow indicator on the Action Replay to correctly insert it into your Gameboy.
Insert "Pokemon Leaf Green" into the Action Replay cartridge. The game cover should be facing you when inserting.
Slide the power button on the Action Replay to "ON" and turn on the Gameboy.
Press "A" on the "Select Codes" option from the main menu. Select "Current Game" to select "Leaf Green" codes. When the code menu appears, press "A" to check off the code you wish to use. You may use as many codes as you wish. When you are finished, press "Start" on your Gameboy to begin playing and using the codes.