Choose ''Heavyweight'' at the first fighter attribute screen in career mode. Set the fighter's weight to ''230'' (max.). Press X to go to the 2nd fighter attributes screen. Change the fighter's body style from ''1'' to ''2''. Press Triangle to return to the first attributes screen. Now you can change his weight from 230 to 280 lbs.
Enter THROB as your characters name.
Enter the following name as your boxer's name:
Enter O as your boxer's name to unlock this character.
Enter ED MOHANE as your boxer's name.
Enter GARGOYLE as your boxer's name.
Enter JERMAINE DUPRI as your boxer's name.
Enter MARC ECKO as your boxer's name.
Enter MARLON WAYANS as your boxer's name.
Go into Exhibition and fight a match in any weight class. During the fight, you must be DQ'd by giving your opponent a kick to the stomach three times.
Do this by pressing Triangle + Square + Circle + X simultaneously.
Once the match is call, you will be taken back to the Exhibition screen.
Choose the Middleweight class, and scroll over until you see Mills Lane with boxing gloves.
Enter Q TIP as your boxer's name.
Enter ROSWELL as your boxer's name.
Enter SHMACKO as your boxer's name.
Enter TIM DUNCAN as your boxer's name.
Enter TITO TRINIDAD as your boxers name.