Various Cheats

In Career Mode enter any of the following "Names":

Name	Effect
KNUCKS	Box as Ashy Knucks
SANDERS	Box as Barry Sanders
GIAMBI	Box as Jason Giambi
SEAU	Box as Junior Seau
NOLAN	Box as Owen Nolan
FRANCIS	Box as Steve Francis
BABY	Box as a Baby
BULLDOG	Box as a Bulldog
CLOWN	Box as a Clown
EYE	Box as a Cyclops
GORE	Box as a Gorilla
100	Full Attributes
DOUBLEDAMAGE	Do Double Damage
NVINCIBLE	Infinite Health

Career mode

Fight yourself or Advance fights.After you hit X to select your next opponent, quickly tap Up or Down to switch opponents. Tapping Down causes you to fight yourself.

Bite opponent's ear

During a match, hold L1 + R1 and press Triangle + Circle + X + Square