checked-no =>Extra Boxers: Enter these codes on the menu to enable celebrity boxers. * Michael Jackson: Press Lx2 Rx2 L R and press [L]+[R] while highlighting Arcade. * Shaquille O'Neal: Press Lx4 Rx2 Lx2 R and press [L]+[R] with Survival highlighted. * Rumble Man: Press Lx2 R L Rx2 L R L and press [L]+[R] with Championship highlighted.