Versus mode:
Hold L1 + R2 at the title screen and press Right + Square.


All sword skills in versus mode:
Play in versus mode and pause the game. Hold R1 and press
Left, Left, Right, Right, L1, L1, L2, L2, L1, Right, Left.


Change players:
Highlight the name of the main player at the character selection and press L1, R1, L2, R2, L2, R1, L1, Left, Left, Left, Left, R2 + Square. By pressing Left or Right you can choose a player.


Restore health:
Pause the game and hold L1 + L2. Then press Up, Down, Up, Down, Left, Right, Square.
Note: This code works not in versus mode.


Swords are harder:
Pause the game and hold R1 + R2. Then press Right, Right, Right, Right, Right, Right, Right, Left, Down, Up, Square.
Note: This code works not in versus mode.


More brightness:
Hold R1 and move the left analog-stick in circles in each direction. The player's eyes will flash and illuminate your environment at night.