Fight Night Round 3 Codes -

All venues
Enter NEWVIEW as a first name in create a champ mode.

Xbox Live gamer points
Complete the following achievements to unlock the indicated number of Xbox Live Gamerscore points (1,000 total possible points):

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

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

Madison Square Garden
The Staples Center

The Burger King as your trainer
Win the Burger King event in Career mode. Then, press Down at the trainer selection screen until The Burger King appears as a choice. Note: He gives you Heart when you fight.

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.