Instructions
Search online for GameShark codes, including the "Master" code for the Game Boy Advance "Pokemon" games such as "Ruby," "Sapphire," "Emerald," "LeafGreen" and "FireRed."
Insert your "Pokemon" game into the GameShark.
Insert the GameShark into the Game Boy Advance and turn the system on.
A GameShark menu will appear after the startup logo. Enter your "Pokemon" title's "Master" code before entering any other codes. After you enter your "Master" code, enter the GameShark codes.