Propeller Hat and Penguin Suit
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.
Contributed By: chrono01.
Save game at any time from overworld map
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.
Visit Toad Houses Repeatedly
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).
Fireworks at the end of the level
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.
Contributed By: IceQueenZer0.
Complete a level and if the last 2 digits of the timer match excluding 00, Fireworks will appear and Toad will also give you an Item. Below is the list of the items unlocked by their matching timer digits.
Item Location 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
Contributed By: SCVengeance.
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