Original URL: http://www.psxextreme.com/ps2-cheat-print/306.html
Fight Night 2004
Cheat List:

All Venues: At the main menu press Left, Left, Left, Right, Right, Right, Left, Right, Right

Big Heads: At the main menu press Left, Right, Left, Right, Left, Right, Left

Big Tigger: At the Main Menu, select My Corner, Record Book, Most Wins-Boxer, then press Up twice

Small Fighter: At the main menu, highlight "Play Now" then press Left, Right, Left, Right, Left