No Background
Press Up, Right, B, Down, Left, B. The screen will flash yellow to confirm correct code entry. Enter the duel mode character selection screen that displays the background. Press X + B on controllers one and two. The picture in the center of the screen will disappear.

Fight Beast in Story Mode
Walk down the stairs at the bottom right corner of the first island and press Start.

Special Story Mode
Select a number from one through seven on the music option screen. This value will correspond to the fighter order on the duel screen. Press Up, Down, B, Left, Right, B. The screen will flash purple to confirm correct code entry. Story mode may now be played with a character other than Shaq.

Blood mode
Press Y, X, B, A, L, R at the options screen. The screen will flash red to confirm correct code entry. Fighters will now bleed when hit.