Hold L1 and press Triangle, Left, Left, Right, Square, Up, Up, Left, Circle at the title screen. Then while playing a game, press L2 + R2 to display a cheat menu.

There is a shortcutin the Water Race. When you get to the waterfall go through it and you will be on the other side of the river.

Hold L1 and press Circle, Down, Left, Up, Right, Triangle, Down at the title screen.

At the title screen, hold L1 and press Square, Square, Circle, Down, Left, Right, Left, Right. Then while playing the game,hold and press Square to add one hundred crystals to your inventory. Repeat this to add an unlimited amount of crystals to your inventory.