99 Overall
Type player name "King Rob".
All venues
Enter "NEWVIEW" as a first name in Create Champ mode to unlock all venues.
Bonus venues
Win a match at one of the corresponding venues in Career mode to unlock it:
- The Staples Center
- Madison Square Garden
Box as Ko Rey Mo
Defeat Ko Rey Mo in the light heavy division in Career mode.
Boxing styles
Win matches in ESPN Classic Fights mode or Career mode to unlock various new styles, at random:
Hard Straights
Hook Master
Judge Jab
Lethal Uppercuts
Philly Shell
Sinister Cross
Slickster
Smooth
Textbook
Uptight
Burger King trainer
Win the Burger King event in Career mode. Then at the trainer selection screen, press Down until the Burger King appears as a choice. He gives you Heart when you fight.
Easy win
When your enemy goes to attack you, block him and then use your special attack (down button for default controls.) Just keep repeating this until you get your enemy down on the ground. (I hope this information is useful. It worked for me and I beat the game within a day.)
Ko Rey Mo and Burger King trainer
Enter YAXKUKMO as a last name in Create A Champ mode.