New Super Mario Bros. Wii Hints & Cheats

After you beat the game, World 9 is unlocked. Collecting all Star Coins in a world unlocks the corresponding level.

After you finish the final castle in World 8, you can save anywhere in the map. A Save option will appear where the Quick Save option used to be.

If you see a level where a Toad is trapped go into the level and save him. The type of Mushroom House that appears will depend on the last digit of the time counter.

To get a mushroom house to appear in multiplayer, you simply need to clear the level when the time has the same 2 end digits next to each other when you touch the flag pole. Examples: 544, 322, 411. Depending on the two end digits, you will make different mushroom houses appear at the start point, as you would in single player when you save a Toad, only the digits are mostly red mushroom houses. Two zeros at the end will get you nothing. When you do this, you hear the original Super Mario Bros. level clear music and see a number of fireworks depending on what the last 2 digits are. 1 firework for 11, 2 for 22, and so on.

Fulfilling special tasks will award you stars on your save file.

Collect 99 lives at any point during the game. Upon returning to the map screen, Mario will not be wearing his hat. Lose a life, and Mario's hat will return.

When you beat the first level of the game, as well as beat a level while rescuing a captured toadstool (1-player only) the old 8-bit end level fanfare will play from the first Super Mario Bros.

Every dancing flower will give you one coin if you Spin Jump (flick Wiimote upwards) from a Neutral position.

Get five stars on your save file by beating the game, collecting all the star coins in worlds 1-8, all the star coins in world 9, finding all the exits from a level and using every mushroom house and cannon on the map and you'll get a message saying everything has been cleared. Mushroom Houses will never go away, letting you max out your items.