Upon completing the game once and unlocking Superstar Road, the Propeller Hat and Penguin Suit power-ups [from New Super Mario Bros. Wii] are made available from the Toad Houses located there. Once obtained, they can used in any level in the game.
Finish Story Mode, and "Quick Save" will be replaced with "Save" on the start menu for the overworld. You can now save at any time from the overworld--not just after finishing important levels.
Earn all five stars on your profile, and you can visit Toad Houses repeatedly without them becoming inactive (previously inactive Toad Houses will become accessible again).
If you touch the flagpole and the last 2 digits match (11, 22, etc.), fireworks will appear. The number of fireworks depend on the last 2 digits. 11 is 1 firework, 22 is 2 fireworks and so forth.
|Fire Flower||Last 2 digits equalling 33 or 44|
|Ice Flower||Last 2 digits equalling 55|
|Star||Last 2 digits equalling 88 or 99|
|Super Accorn||Last 2 digits equalling 77|
|Super Mushroom||Last 2 digits equalling 11 or 22|
|Tiny Mushroom||Last 2 digits equalling 66|