Press X during gameplay to display the team menu. Next,
hold Select, press Left Analog-stick Up and rotate it clockwise three
times then immediately rotate it counter-clockwise three times while
continuing to hold Select. Note: Your selected character will run around
when this is done. While in the same menu, you should notice that a
new icon has appeared under the log icon in the lower right hand corner
of the screen. Highlight it and press X to display the cheat menu. The
cheat menu allows all weapons, invincibility, unlimited weapon energy,
level skip, and level selection.