Power Dash
How to unlock: Complete the 2nd world with 400 points.

Cheats
Infinite Lives: Pause while playing, hold L1 and enter UP, UP, UP, LEFT, LEFT, RIGHT, LEFT, RIGHT.

Infinite Shields: Pause while playing, hold L1 and enter UP, DOWN, UP, LEFT, RIGHT, DOWN, UP.

Flying
How to unlock: Finish the first world with 400 points.

Unlock Cheats
Get 100 fireflys (the circular magnetic balls) in each level of the world. You must 1st beat all of the levels with 100 fireflies (including the secret levels) then you unlock a cheat.