All Venues
At the main menu, highlight the 'My Corner' option, then press Left, Left, Left, Right, Right, Right, Left, Right, Right.

Big Head Mode
Go to the main menu and highlight the 'Fight Now' option. Then, press Left, Right, Left, Right, Left, Right, Left. A sound will confirm that the cheat has been activated. Select 'Fight Now' to play in big head mode.

Go to: Fight Night 2004 Info Page | nGaming Home Page.