MarioEX*

First you need an action replay. There are two ways you can enter a code go to codes than the game and add new code or you can connect your action replay to the computer and open the code manger if you don't have the code manger than use the disk the action replay is supposed to come with. You can also copy paste codes with the manger. To use them go to codes than the game and check of the codes you want to use(make sure the (M) code is on than start the game. If you don't have an action replay than you can by them at wallmart,radioshack,bestbuy and many other places.