Enter "GETFAB" as the first name of a created boxer. Save the created boxer and Ghetto Fabulous will be unlocked under the heavyweights roster.Box as Little Mac
Enter "Macman" as the first name of a created boxer. Save the created boxer and Little Mac from the Punch Out!!! games will be unlocked. Alternately, successfully complete the Super Punch Out! mini-game. Note: This feature is available in the North American NTSC version of the game.All venues
At the game mode selection screen, hold or repeatedly tap Left until the sound of a bell is heard to unlock all venues.Small fighters
At the venue selection screen, hold Up until the sound of a bell is heard. Select a venue to begin a fight with small versions of both fighters.Extra fight store items
Although you can turn pro at any time, winning an Amateur title belt will unlock equipment you cannot find elsewhere.Better ring performance
Make your ring entrances very extravagant; the more extravagant they are, the more the crowd will like you and the better you will perform.Avoiding knockouts
In order to avoid a knockout, when your opponent gets close to you perform a grab. You will then exit knockout mode.Easier wins
Become skilled with the jab and straight combo. The CPU will parry it after a few times. Then, throw your hook or uppercut.