To unlock the four Nintendo World Championships levels, complete the 10 Mario Challenge mode 7 times. Complete all four to unlock the Luigi Mushroom item, which can be used in Course Maker by grabbing and shaking a Super Mushroom. It can only be used in Super Mario Bros. levels.
|Unlockable||How to unlock
|Luigi Mushroom||Complete all four NWC 2015 levels.
|NWC 2015 Levels||Complete 10 Mario Challenge 7 times.