In career mode, Create your own wrestler and name him:
Best Buy
Note: The name is cap sensitive. You must capitalize the B in each name.
Naming your character "Best Buy" will give you 999 skill points to use as you wish.
Get the UFC Silver Belt with any of the 22 original fighters to unlock their body type and fighting style in Career Mode.
While playing career mode, after you've selected a wrestler, and the match is loading, hold down all four buttons (A + X + Y + B) and both triggers for a different referee.
After selecting the fighters while the fight is loading press and hold the shoulder buttons (L + R) until the fight starts the announcer will become the ref.
Get the UFC Gold Belt with a Career Mode character to unlock Big John McCarthy's body type, fighting style, voice, and nickname.
Get the UFC Silver Belt with a Career Mode character to unlock Bruce Buffer's body type, fighting style, voice, and nickname.
Get the UFC Silver Belt with all 22 original fighters to unlock the Card Girl's body type, fighting style, voice, and nickname.
Get the UFC Gold Belt with all 22 original fighters to unlock Ulti-Man's fighting style and the ''Suitcase'' location.
Get the UFC Gold Belt on hard difficulty to unlock Ulti-Man's body type, voice, nickname, and the ''Octagon'' location.