Hold up while the bell dings to start with your opponent in the fists-up stance. Hold nothing for them to start down.
Character sequence
Defeat the game without losing once to see a small scene for each character as they appear.
Defeating Mad Clown
Pause game play immediately before Mad Clown throws the balls at your boxer. This will allow you to see which way you have to move to avoid them.
Defeating Nick Bruiser
Nick Bruiser moves fast for the first few punches if he punches at your face -- you can only hit him in the face for the first three hits. If he does a Torso Punch, hit him in the lower torso one time in the torso and two times in the face. Note that he moves around like Hoy Quarlow when you punch him. When he moves up to the center and jumps down at you, just dodge to the right and duck because he is going to punch you twice. You can super punch him in the torso if he does not block, but if he tries to slam his fist like Rick Bruiser, dodge and super punch him. When he sounds like a bull, block the torso, then the face until he does an uppercut. Dodge that and punch him, then super punch him. Repeat this until he is defeated.
Enter Your Name in Japanese
To enter your name in Japanese, highlight "New Game" and press X + A.
Health recovery
Rapidly tap all buttons while your opponent is on the floor to quickly regain health.
Hit Narcis Prince in the Face
There is a secret way to hit the Narcis Prince in the face. When he stands still and blinks 4 times, he will leave his face unprotected for one second after the 4th blink. Give him a quick jab to the face just before he tries to punch you. He will become very angry that you hit his pretty face and become much weaker for about 20 seconds or until you knock him down. This will allow you to defeat him much quicker than just hitting him in the torso.
Secret Ending
Beat the Special Circuit without losing to unlock a secret ending.
Sound Test
Turn on the game, and, before the Nintendo logo fades, press and hold L + R on controller 2. Use controller 1 to play the sounds in the menu.
Special Circuit
Get a 4-0 score in the Minor, Major and World Circuits to unlock the Special Circuit.