
With at least two human players you can perform a special double ground pound that has the ability to kill all nearby enemies much like a POW block. You'll need to time your ground pound (press JUMP then DOWN) so both players hit precisely at the same moment.
On the world map you'll encounter marauding enemies. To avoid these map screen enemies you can activate a star from your item menu.
Beat the game to make all the Mushroom houses in Worlds 1-8 reappear.
Shake the Wii Remote to spin-jump on any of the small, dancing flowers in the game to make a coin appear.
After you beat the game (beat World 8-Bowser's Castle) you'll be able to "hard save" anywhere you'd like. the option replaces the Quick Save option.
In New SMB Wii, you can make a bonus Mushroom house appear on the map by saving Toad when he appears in a level. To do this, you'll need to head to a level with the white Toad marker. Release Toad from the ? Block he's trapped in -- near the beginning of a level, listen for the cries -- and run him all the way to the end of the level to make a Mushroom House spawn. The type of Mushroom house depends on the final digit of the time when you grab the flag at the end of the level.
Gather all of the Star Coins in one world to unlock World 9. Each level in World 9 is unlocked by gathering all of the coins in each of the Worlds 1-8:
Perform the actions below to unlock an alternate ending:
If you get 99 lives, the maximum number of lives in New Super Mario Bros. Wii, Mario will lose his hat! Once you beat a level with a full 99 count, Mario will appear hat-less on the map screen and in subsequent gameplay. You'll regain your hat once you lose a single life.
PErforming special actions will award you stars on the title screen. Here are the stars you can earn:
Collect all three Star Coins on a particular level to unlock the Hint Movie for that level. This Hint Movie reveals the developer's best chops at New Super Mario Bros. Wii -- how to get infinite 1-Ups, secrets and Star Coins.
Fail a level 8 times and the game will give you the option to turn on an "Auto Pilot" mode in which Mario completes the level on his own.