Superstar Road

Superstar Road is the ninth and final world of New Super Mario Bros. U and New Super Luigi U. It is similar to World 9 from New Super Mario Bros. Wii. Super Star Road is a homage to Star World from Super Mario World. The portal to this world is on an island between Sparkling Waters and Acorn Plains. It can only be accessed via a pipe after completed the game. This is the only world where two of the power-ups from New Super Mario Bros. Wii, Propeller Mushrooms and Penguin Suits, can be found. There are a total of 9 levels in this world, 8 of which are only accessible by collecting all the Star Coins from each world while the last one can be unlocked by completed all other Superstar Road levels with 3 Star Coins collected.

Boost Rush Courses

 * Hammerswing Caverns - Superstar Pack
 * Lakitu! Lakitu! Lakitu! - Superstar Pack

New Enemies

 * Big Fuzzies
 * Cheep Chomps

Trivia

 * This world, along with Rock-Candy Mines and Peach's Castle, is one of the only three worlds in the game to not have Enemy Courses.