It's Luigi's turn to shine in ... 
New Super Luigi U2013 was the "Year of Luigi" -- and Luigi gets the starring role in his very own "Super Luigi" title!  Originally released as paid DLC for 
New Super Mario Bros. U, 
New Super Luigi U consists of all new levels placed in NSMBU world map.  Mario doesn't appear -- just Luigi, two Toads, and Nabbit.  Run, jump & stomp your way through the game to save Princess Peach.
Aside from starring Luigi, there are a few other differences to be found in 
New Super Luigi U.  All the levels are shorter and must be completed within 100 seconds.  Luigi jumps higher and "slides" a bit on landing, as do the other characters.  Every level features a "hidden Luigi" graphic. The weirdest change, however, is in how the character of Nabbit plays -- he runs through enemies without taking damage, and doesn't use power-up items, instead stuffing them into his napsack for bonus points.
While originally released as DLC, the game later received a stand-alone 
physical release, as well as being sold as part of the physical bundle 
New Super Mario Bros. U + New Super Luigi U.  In 2019, it was released on the Switch as part of 
New Super Mario Bros. U Deluxe.
 
 