Big Tigger Character:
Select "My Corner" from the main menu and then look at the record books. View 
the "Most Wins - Boxer" screen and press UP twice. Tigger is a middleweight 
fighter. 

Midget Mode:
From the main menu, enter LEFT, RIGHT, LEFT, RIGHT, LEFT 
Open All Arenas:
From the "My Corner" menu, enter LEFT, LEFT, LEFT, RIGHT, RIGHT, RIGHT, LEFT, 
RIGHT, RIGHT 

Unlockable: Ring Girls, Trucks, and More:
To unlock extras such as ring girls, bonus trucks, special punches, new entrance 
music, and more, simply copmlete in the Career mode and win fights. 
 
Unlockable: Special Punches:
Bolo Punch: Defeat Ray Leonard 
Ducking Hook Punch: Defeat Muhammad Ali 
Look Ma No Hands Punch: Defeat Roy Jones Jr. 
Lunging Hook Special Punch: Defeat Bernard Hopkins 
Lunging Hook Special Punch: Defeat Evander Holyfield 
Watch the Birdie: Defeat Bernard Hopkins 
 
Illegal Blows:
When the bell rings to end the round you can head but or low blow without being 
disqualified in every round. 

Taunt With All Controller Configs:
Not all controller configs have a dedicated taunt button, such as configs 3 and 5. 
To taunt when using these controller configs simply press L + R + Click Left 
Thumbstick + Click Right Thumbstick, L + R + Click Left Thumbstick + Click Right 
Thumbstick during any fight. 

Uppercut Without Total Control:
To perform an uppercut with Total Control Punching disabled, press Jab + Hook 
together. 
 
Wake Up From Knock Downs:
To stand up after getting knocked down--not knocked out--use the Left and Right 
Analog Sticks to match up the three blurry images of the ref. Find a focal point, 
such as the EA logo on the ref's shirt, and move the two images to match the one 
that stays still.