Cheat mode:
Press RS(2), LS, A, C, B, Right, Left, LS while playing the game. Hold X to enter cheat mode. A open door icon will appear in the top left corner of the screen to confirm correct code entry. While continuing to hold X, submit one of the codes below:

Increase Defense
Hold X and press A.

Increase Offense
Hold X and press B.

Increase Agility
Hold X and press C.

Invincibility
Hold X and press LS to toggle invincibility on and off. A red shield with an S will appear in the top left corner to indicate invincibility.

Increase rank
Hold X and press RS to advance in rank.