Fight Night Round 3 Codes -

All venues
Enter NEWVIEW as a first name in Create A Champ mode.

Ko Rey Mo and Burger King trainer
Enter YAXKUKMO as a last name in Create A Champ mode.

 Bonus venues:
Win a match at one of the corresponding venues in career mode to unlock it.

Madison Square Garden 
The Staples Center 

Fight as Ko Rey Mo:
Defeat Ko Rey Mo the light heavy division in career mode.

Boxing styles:
Win matches in ESPN Classic Fights mode or during career mode to unlock various new styles, at random.