Can action replay or gameshark codes mess up your game?
It can only mess up your game if you do something obviously stupid when entering codes such as those that conflict with each other or conflict with the game’s storyline. Also, if you don’t take good care of the cartridge/disk and it becomes defected then it can mess up your game, so just be careful that way. You should be fine if you use codes that won’t screw up the game and you’re sure that will be fine, it’s good common sense that will tell you when it’s safe to use.
