From the Super Mario Wiki
Moonlight Mansion is Mini Luigi's world and the seventh world overall in Mini Mario & Friends: amiibo Challenge. The main mechanic featured in this world are candles that will turn normally transparent Empty Blocks into solid yellow Rotating Blocks as well as temporarily stunning Boos. Mini Luigi's special ability in this world is the High Jump, which allows Mini Luigi to get over high ledges that a normal jump can't reach. One main level also takes place before this world, Level 8.