Play As Shaquille O'Neal ( BIG SHAQ DIESEL)
At the main menu press, RIGHT, UP, LEFT, RIGHT, DOWN, LEFT, UP, RIGHT, DOWN, LEFT, SQUARE, TRIANGLE (2), SQUARE, START, TO unlock Shaq. If you entered it correctly, a message will appear.
Purchase Items For Free
First, you need to have enough unlock points to be able to select the item you want. Now, go to it and press X to select it. The next screen should ask if you want to purchase the item. Select "Yes". Now, for the last part, instead of pressing X to head back to the Shop Menu, press O. The game will give you the item, however, it won't deduct the points from your total, allowing you to buy out the shop without spending a single unlock point.
Play As Mask, Punk Ass, Skyscrape
At the main menu press, DOWN (2), UP, RIGHT, LEFT, DOWN, SELECT, START, to unlock Mask (light heavyweight), Punk Ass (lightweight), and Skyscrape (middleweight)from Tapout. If you entered the code correctly, a message will appear.
Play As BJ Penn In Black Trunks
At the main menu press, L1, R1, L2, R2 (2), L2, R1, L1, TRIANGLE, SQUARE (2), TRIANGLE, START. To unlock BJ Penn in black trunks. If you entered it correctly a message will appear letting you know.