Various cheats
     Enter these codes at the pause menu, while holding L and R

Cheat code:                                      Effect:
Down, Down, Right, Right, Up, Up, Left, Left     Unlimited Energy
Left, Down, Right, Up, Left, Down, Right, Up     Invincible
Up, Up, Down, Down                               20 Free Shields
Left, Right, Left, Right                         25 Boosts Given
Down, Left, Up, Right                            Unlocks Everything
Right, Down, Right, Down                         Max Abilities

200 crystals
     In  the 3rd level there should be a raft to go on go on it a jump
in  the water, you will get 200 crystals, but you will have to restart
the level. You will still have all of the stats, like crystels, stars,
etc...