Rotate the Right Analog-stick thirty times at the title screen. Alternately, hold L2 and continuously rotate the Right Analog-stick clockwise at the title screen.

Hold Start + Select on controller two after turning on the system. Press Square to move forward, X to jump, and Triangle (when the power meter is full) to do a rocket attack. Knock your opponent out of the ring to win.

Enable the "Kaneyo Mosquito" code. Then, hold L2 and quickly press Up, Right, Left, Down, Square(2), R2(3) at the character selection screen. A shout will confirm correct code entry.

Hold L1 and quickly press Up, Right, Left, Down, Square(2), R1(3) at the character selection screen. A shout will confirm correct code entry.

Hold L1 + L2 + R1 + R2 and press Start + Select during game play.

Fill each of the sixteen Ex Tanks to unlock Year 2.

Unlock all alternate costume colors on every level.