Power Smash 3

At the main menu, press Up(2), Down(2), Left, Right, Left, Right to unlock all courts. If you entered the code correctly, you will hear a sound.

Get three strikes in a row in the Pin Crusher mini-game.

Defeat Duke or King in a SPT final to unlock the Guitar racket.

In Career mode, play the "Defend The Prize" mini-game repeatedly. Choose one prize and stand in front of it (ignore the others). Simply defend that one prize to easily win the mini-game every time and be able to increase your Volley skill as quickly as desired.

Select Tournament Mode and win every singles match with the required rank.

Unlockable - How to Unlock

Duke - Get a "C" rank or higher and defeat him
King - Get a "D" rank or lower and defeat him

Press Circle, Left, Circle, Right, Circle, Up, Circle, Down at the main menu. A sound will confirm correct code entry.