Enter the following Gym Names in Championship mode:
BRONZE Enable bronze class boxers in Arcade mode SILVER Enable silver class boxers in Arcade mode GOLD Enable gold class boxers in Arcade mode CHAMP Enable champion class boxers in Arcade mode
If your blood is low press X, Down, Circle, X, Square
Cheap training equipment:
Select the "Train Boxer" option in championship mode. Then, go to "Rumble Aerobics Training", press Left and immediately press X. If done correctly, you will have just purchased the $25,000 vitamin bottle for $500. You can do it with any of the training equipment.
Thanks to Revolution readers Joe Rulo, SPEED3_16, Terry and Andrew Johansen!