New Super Mario Bros. Wii - Unlockable levels

Unlock - Collect:
Level 9-1 - Collect all Star Coins for World 1
Level 9-2 - Collect all Star Coins for World 2
Level 9-3 - Collect all Star Coins for World 3
Level 9-4 - Collect all Star Coins for World 4
Level 9-5 - Collect all Star Coins for World 5
Level 9-6 - Collect all Star Coins for World 6
Level 9-7 - Collect all Star Coins for World 7
Level 9-8 - Collect all Star Coins for World 8

Unlock Save option:
Beat the game to unlock the Save Option.

Unlock Green Mushroom House:
Rescue Toad and hit the finish flag when the last digit of the time ends in 0, 1, 2 or 3.

Unlock Red Mushroom House:
Rescue Toad and hit the finish flag when the last digit of the time ends in 4, 5 or 6.

Unlock Gold Mushroom House:
Rescue Toad and hit the finish flag when the last digit of the time ends in 7, 8 or 9.

Hatless Mario at map screen:
Collect 99 lives to make Mario's hat dissappear at the map screen.

Flower coins:
Spin Jump on a dancing flower to recieve a coin.

Original End Level Fanfare from Super Mario Bros:
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