Things You'll Need
Instructions
Open the Visual Boy Advance program. Click "File," then select "Open." Select any ROM compatible with the emulator (only games in .GB, .GBC, or .GBA file format work with the Visual Boy Advance). Double-click it to begin running it.
Click "Cheats," then select "Cheat List." Click on the "Gameshark" button in the cheat list window, enter the desired cheat code, and click "OK" to save it to the list.
Set which cheat codes are active during game play by checking or unchecking the boxes next to them as you wish (entered cheat codes are turned on by default). Click "OK" to return to your game when satisfied.