CheatCodes.com has all the official Boxing Fever GBA cheats to unlock everything. If you know of any that we don't have, please let us know.
All published and official codes as of Saturday May 18, 2013 for Boxing Fever are shown below.
Go to the password screen, and enter B3G58318. If you entered the code correctly,you'll automatically go to the next match.
When choosing your boxer, hit these buttons, then hit select when you're finished entering the button sequence.
Left(4), Right - more hit power Right, Left(2), Right, Left - invincible
Result Password Amateur Series completed 90HG6738 Top Contender Series completed H7649DH5 Pro Am Series completed 2GG48HD9 Prof. Series completed 8G3D97B7 World Title completed B3G58318 Survival Mode completed G51FF888
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