How do you cheat on Kingdom Hearts 2 final mix

1.go to ebay 2.search gameshark for ps2 3.buy it 4.when it comes 5.put gameshark in ps2 [warning: this might ruin your ps2] 6.load gameshark 7. go to cheats and find kingdom hearts 2 final mix+ if the gameshark does not have the game go online and search at google kingdom hearts 2 final mix+ gameshark codes and you must have a mastercode for your codes to work