New Super Luigi U Wii U unlockables.
Play As Your Mii
First you need to press ZR+ZL together as you start playing a level (or the B button, if you're using
a Wii Remote control), you will be able to play as Nabbit. In the case of the final Star Road level,
though, you'll instead be able to play as your Mii.
Play as Nabbit in Single-player
If you press ZR+ZL together as you start a level (or the B button, if you're using a Wii Remote),
you'll be able to play as Nabbit in the single-player mode. Normally, he's only available when you
are playing with friends.
To obtain all five file stars, you'll need to:-
Beat the last Bowser
Then find every normal and secret flag (there are 94 in all)
Catch Nabbit when he appears in each of the first seven worlds during the game
Then obtain every star coin in the standard 8 worlds
Obtain all star coins in every world and level, including level 9 in Superstar Road,
this will then unlock the five stars.