Play as the Sub-Bosses: To play as any of the character's alter egos, finish the game with any character. To make things easier, set the game to "Easy," the timer to the lowest match time, and set the fights to one round. Be sure and save the hidden characters to the memory card.

Super Deformer Characters: To play the game with super deformed fighters, do the hidden fighters trick as outlined above. Then, Whenever you select a fighter for a one- or two-player game, hold Select when picking your fighter. You fight as a larger version of your normal self. If the winner of two rounds continues to hold Select for the next match, his wighter will be even bigger.

Punch-Out Mode: First, you must have access to all the bosses and hidden fighters with the memory card. Then, at the Character Select screen, press and hold L1 and L2. Select your fighter. When the match starts, your view will change to first-person and you will fight as a wireframe of your character.