Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "RUMBLE POWER" as a gym name to unlock all class bronze boxers in championship mode. Note: This also unlocks Kemo Claw in arcade mode.

Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "RUMBLE BUMBLE" as a gym name to unlock all class silver boxers in championship mode. Note: This also unlocks Bruce Blade in arcade mode.

Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "MOSMA!" as a gym name to unlock all class gold boxers in championship mode. Note: This also unlocks Nat Daddy in arcade mode.

Select "Championship Mode" from the main menu. Then, choose "New Game" and enter "POD 5!" as a gym name to unlock all class champ boxers in championship mode. Note: This also unlocks Damien Black in arcade mode. -From: jkool@enter.net

Set the system date to October 31 to place skeletons in the crowd. Set the system date to December 25 to place Christmas trees in the prize fight arena.

At the character selection screen, press X + Y to alternate your character's costume and introduction (in arcade mode).

At the character selection screen, hold X and press Up, Right, Down, or Left.

At the character selection screen, hold X and press L + R.

During a match, hold X + A or Y + B to taunt your opponent.

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.

Enter "Arcade Mode" from the main menu and select two player mode. Then at the character selection screen, hold L while selecting a boxer.

Enter "Arcade Mode" from the main menu and select two player mode. Then at the character selection screen, hold R while selecting a boxer.

Enter "Arcade Mode" from the main menu and select two player mode. Then at the character selection screen, hold L + R while selecting a boxer.

Enter "Arcade Mode" from the main menu and select two player mode. Then at the character selection screen, hold X + L + R while selecting a boxer.

Pause the game and press X + Y.

Select the "Train Boxer" option in championship mode. Then, go to "Rumble Aerobics Training", press Left and immediately press A. If done correctly, you will have just purchased the $25,000 vitamin bottle for $500. You can do this with any of the training equipment, however the vitamin bottle will save the most money.

Successfully complete one player arcade mode or championship mode. While the credits are showing, look in the background. Usually, the word "Credits" scrolls by, but occasionally, another message such as "Hi Mom" or "Pod 5 Rulez" will appear.

Place the game disc in a PC compatible CD-ROM drive to find twenty hidden images in the "Extra" directory. -From: casa@direct.ca

Start the Dreamcast without a disc to access the audio CD player. Insert the game disc and play track two and higher to hear music from the game. -From: jackiann@home.com