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Older Systems
Dreamcast
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Alternate
Backgrounds
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.
Alternate Cornerman
At the character selection screen, hold X and press Up, Right, Down, or
Left.
Alternate Costumes
At the character selection screen, press X + Y to alternate your character's
costume and introduction (in arcade mode).
Bronze Class
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.
Champ Class
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.
Cheap Training Equipment
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.
Fight In Championship Arena
Enter "Arcade Mode" from the main menu and select two player
mode. Then at the character selection screen, hold R while selecting a
boxer.
Fight In Gym Ring
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.
Fight In Outdoor Ring
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.
Fight In Two-tier Arena
Enter "Arcade Mode" from the main menu and select two player
mode. Then at the character selection screen, hold L while selecting a
boxer.
Full Pause Screen
Pause the game and press X + Y.
Game Music
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.
Gold Class
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.
Hidden Images
Place the game disc in a PC compatible CD-ROM drive to find twenty hidden
images in the "Extra" directory.
Hidden Messages In Credits
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.
Leprechaun Cornerman
At the character selection screen, hold X and press L + R.
Restore Energy
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.
Silver Class
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.
Taunts
During a match, hold X + A or Y + B to taunt your opponent.
