To unlock Boxers in Championship and Arcade mode, start from the Main Menu and select Championship Mode and start a new game. When prompted for a gym name, enter one of the following codes to unlock the characters in Championship and Arcade modes.
| Code | Unlocks Who in Championship mode | Unlocks Who In Arcade Mode |
| RUMBLE POWER | All Bronze class boxers | Kemo Claw |
| RUMBLE BUMBLE | All Silver class boxers | Bruce Blade |
| MOSMA! | All Gold class boxers | Nat Daddy |
| POD 5! | All Champ class boxers | Damien Black |
The game has some funky holiday thematic backgrounds. If you set the date to a holiday, the backgrounds may change. Try using Hallowe'en (October 31) and Christmas (December 25).
From the character selection screen, press X + Y to alternate your character's costume and introduction in arcade mode.
From the character selection screen, hold X and press Up, Right, Down, or Left.
From the character selection screen, hold X and press L + R.
During a match, you can taunt your opponent by holding X + A or Y + B.
Knock your opponent down, then sweep the Analog-stick in a Full-Circle or repeatedly press L + R while they are stunned to restore some of your boxer's energy.
To fight in a different arena, start by selecting a two player mode game from the Arcade Mode selection screen. While selecting a character, enter the following codes:
| Arena | Code |
| championship arena | hold L when selecting character |
| two-tier arena | hold L when selecting character |
| gym ring | hold R when selecting character |
| outdoor ring | hold X + L + R when selecting character |
Pause the game and press X + Y to clear the text/menus.
Place the game disc in a PC compatible CD-ROM drive to find twenty hidden images in the "Extra" directory. -From: casa@direct.ca
If you use any normal CD player, you can play tracks 2 and above.
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