All venues: Highlight the "My Corner" option at the main menu, then press Left(3), Right(3), Left, Right(2). A sound will confirm correct code entry. Big head mode: Highlight the "Fight Now" option at the main menu, then press Left, Right, Left, Right, Left, Right, Left. A sound will confirm correct code entry. Select the "Fight Now" option to have a big headed boxer. Fight as Big Tigger: To unlock Big Tigger as a boxer, go to the main menu. Select "My Corner", then "Record Books", then "Most Wins-Boxer". Tap Up(2) and you will now be able to play as Big Tigger as a middleweight fighter. A sound will confirm correct code entry.