Fight Night Round 3

Unlock The Burger King to be your Trainer
Beat the Burger King Event on Career Mode. Then next time you select a Trainer to....train with just keep going down past the $50,000 trainer and he'll be selectable as a trainer. He also gives you Heart when you fight.

Achievements List
Accomplish these tasks within the game to earn gamerpoints.

Burger King Achievement 100 points Win The BK Invitational Fight.
Dodge Achievement 100 points Win the Dodge sponsored fight.
EA SPORTS Achievement 150 points Win any EA SPORTS sponsored fight.
ESPN FNF Achievement 150 points Win any ESPN Friday Night Fight event.
ESPN PPV Achievement 150 points Win any ESPN Pay Per View fight event.
ESPN WNF Achievement 150 points Win any ESPN Wednesday Night Fight event.
Everlast Achievement 100 points Win the Everlast sponsored fight
Under Armour Achievement 100 points Win the Under Armour sponsored fight.

Staple's Center venue:
Win at the Staple's Center in career mode.

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'. Start a fight and use the Elbow Shot to counter attack each time your opponent throws a punch. Note: it is important 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 put him KO in a short period of time, or TKO because you inflicted so much damage to his eye.

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

Boxing styles
Win the indicated match in ESPN Classic Fights mode as the listed boxer to unlock the corresponding style:

Judge Jab: Defeat Joe Frazier as Muhammad Ali.
Lethal Uppercuts: Defeat anyone as Roberto Duran.
Sinister Cross: Defeat anyone as Roy Jones Jr.
Slickster: Defeat anyone as James Toney.
Textbook: Defeat anyone as Oscar De La Hoya.
Uptight, and Hard Straights: Defeat anyone fight as Winky Wright.