Ready 2 Rumble Boxing
Enter the following as Gym names in Championship Mode:
CHAMP Enable Championship class boxers
GOLD Enable Gold class boxers
SILVER Enable Silver class boxers
BRONZE Enable Bronze class boxers
In Training, highlight the Rumble Aerobics Training and press Left and then quickly press A. If you did it fast enough, you will buy the Rumble Mass Nutrition Regime (which costs $25,000) for $500! This will boost your strength and experience very quickly.
Press C-Up + C-Left to change the outfit and the pose of the boxer.
Life when opponet is down:
When you knock you opponent down while the ref is counting tap L + R and your health will refill
Thanks to Revolution readers Adam Borchert, Troy, Alex Yo Juggalo Homie, yamcha (who is really justin, so there), and Markie Doolittle!