Propeller Hat and Penguin SuitAdded 17 Nov 2014, ID #259
When you have unlocked Superstar Road the Propeller Hat and Penguin Suit power-ups (from New Super Mario Bros. Wii) will become an available option at the Toad Houses that are located there and once obtained they can be used in any level of the game.
Bucket hustle challenge warp gateAdded 5 Jan 2013, ID #37
Start this challenge and just over three quarters of the way there is a tunnel. Go down the tunnel and the timer earns three seconds and you reach a red flag, unlocking all time trail challenges. Note: this will not work during story mode.
When you touch the flagpole at the end of the level fireworks will appear when the last 2 digits match (11, 22, etc.). The number of fireworks depend on the last 2 digits. 11 is 1 firework, 22 is 2 fireworks and so forth.