Mario Bros. cheats and cheat codes for Nintendo Wii

Jump through floors:
Note: To perform the following trick, you have to pause the game in good
time (required perfect timing), so this will not work always.

Jump right under a floor. Right when you're about to hit the bottom of the
floor, press the START button to pause the game play. Then press Start
again to resume the game.

If you done correctly, you will jump right through the floor and
end up on top of it.