Ready 2 Rumble Boxing Codes -

Champ class boxers:
Enter championship mode and enter POD 5! as a gym name. (Note: Include the exclamation point and the space between "D" and "5"). Exit championship mode and enter arcade mode to have access to all the boxers including Damien Black.

Gold class boxers:
Enter championship mode and enter MOSMA! as a gym name. Note: This also unlocks Nat Daddy in arcade mode.

Silver class boxers:
Enter championship mode and enter RUMBLE BUMBLE as a gym name. Note: This also unlocks Bruce Blade in arcade mode.

Bronze class boxers:
Enter championship mode and enter RUMBLE POWER as a gym name. Note: This also unlocks Kemo Claw in arcade mode.

Leprechaun cornerman:
Press X + L + R at the character selection screen.

Alternate cornerman voices:
Hold X and press the D-pad at the character selection screen.

Alternate costumes:
Press X + Y at the character selection screen to access an additional set of costumes and introductions (in arcade mode).

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

Fight in the two-tier arena:
Select two player arcade mode, then hold L when selecting a boxer at the character selection screen.

Fight in the championship arena:
Select two player arcade mode, then hold R when selecting a boxer at the character selection screen.

Fight in the gym:
Select two player arcade mode, then hold L + R when selecting a boxer at the character selection screen.

Fight in the outdoor ring:
Select two player arcade mode, then hold X + L + R when selecting a boxer at the character selection screen.

Taunt opponent:
Hold X + A or Y + B during a match.

Full pause screen:
Pause game play, then press X + Y.

Restore energy:
Knock your opponent down, then sweep the Analog-stick in a Full-Circle while he is stunned to restore some of your boxer's energy.

Quickly and repeatedly press X + A + Y + B while moving the Analog-stick to restore energy faster. You can do this almost every time, except in later rounds, to restore all of your energy.

Get out of a Rumble Flurry:
If you get started on a Rumble Flurry and your opponent is blocking all your punches, press the buttons for a taunt (X + A or Y + B), and then start your Flurry again (A + B).

Hidden artwork:
Place the game disc in a PC compatible CD-ROM drive to find more images from the game in the "extra" directory.

Hidden message in credits:
Successfully complete the 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.

Easy swaybag training:
After punching the sway bag, rotate the Analog-stick in a full circle until the bag stops moving.

Cheap vitamins:
Choose to train your boxer In championship mode. Once in the menu, go to aerobics, press Left and immediately press A. If done correctly, you will have just purchased a $25,000 vitamin bottle for $500. You can do this with any of the training material, the vitamin bottle will save the most money.

Choose to train your boxer In championship mode. Place the pointer on weight lifting training, which costs $5000, and move to the right. Press the A in-between the two items and you will purchase the vitamins or any other item for less money.

Soundtrack:
Start the Dreamcast without a disc to access the audio CD player. Insert the game disc and play tracks two and above to hear music from the game.