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.

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

Box as Ko Rey Mo
Defeat Ko Rey Mo in the light heavy division in Career mode to unlock him.

Bonus venues
Win a match at one of the listed venues in Career mode to unlock it:





- Madison Square Garden


- The Staples Center

Easy wins in Career mode
Go to the options menu and set Illegal Blows to off. Then, go to the fight store and buy the illegal head punch called Elbow Shot. During a fight, use the Elbow Shot to counter attack each time your opponent throws a punch. Note: Make sure you use the Elbow Shot as a counter attack so that you can connect cleanly and powerfully on you opponent's head. You will see that the Elbow Shot inflicts a lot of damage to your opponent, and will KO him in a short period of time, or TKO because you inflicted so much damage to his eyes.

PS2 Cheats for Fight Night Round 3

Fight Night Round 3 cheat codes

Fight Night Round 3 cheats