You have to have an Action Replay Max or a CodeBreaker in order to download the codes.What you do is go to the code you want and you print out the AR code,First you have to do the MasterCode.Then you can go on every once in a while to see what they updated and put more codes on your game.Here is what I have so far:
Non Playable Characters unlocked
Everything Unlocked
Randy Orton from Smackdown to Raw
Batista from Smackdown to Raw
"The Legend Killer" Randy Orton
"The Animal" Batista
"The Rated R Superstar" Edge
-Denver Nuggets Fan(Melo/Billups/JR/Nene/Kenyon/Lawson)