Big gloves:
Pause game play and press C-Up, C-Down, C-Up(2), C-Down. The sound of a bell 
will confirm correct code entry. Enter the code again to return to normal. 

Big head mode:
Pause game play and press C-Left, C-Right, C-Left(2), C-Right. The sound of 
a bell will confirm correct code entry. Enter the code again to return to 
normal. 

Super punch:
Press A + B + R and the direction to punch while the glove in the upper 
corner is flashing.

Easy knockdown:
Fill your meter then press R + L + A or B to knock down your opponent 
regardless of whether he is blocking. 

Easy training:
Select "Offense" in training mode. Use the following moves to hit the blue 
opponent: Down + A, Down + A, Down + B, Down + B. Repeat until he has been 
hit thirty times. 

Restore energy:
Move away from your opponent, hold Z and sweep the Analog-stick in circles. 
Also try tapping Z repeatedly without moving the Analog-stick.

Easy attribute points:
Select career mode and intentionally lose every fight so you can train to 
earn more attribute points. Once this has been done ten to fifteen times, 
all your attribute points should be at the top. This will allow you to 
easily win your remaining matches, and earn the championship after about 
five fights. Note: Every time you lose a fight, you can train again.