At the 'Main' menu enter the following codes to unlock the corresponding effect. If the code has been entered correctly you will hear a confirmation sound.
Play as King or Duke:
Press Up(2), Down(2), Left, Right, L1, R1.
Unlock ALL Courts:
Press Up(2), Down(2), Left, Right, Left, Right.
Unlock ALL Gear:
Press Left, Right, Circle, Left, Right, Circle, Up, Down.
Win One Match to Win Tournament:
Press Circle, Left, Circle, Right, Circle, Up, Circle, Down.
Added by: Sanzano Feb 23rd 2011, ID#3648