Luigi in the Cage
From the Super Mario Wiki, the Mario encyclopedia
However, the cage is closed and the only way in is to use Luigi's invisibility power. Moving past the cage, Luigi has to go up the pole and use the two lifts behind him. At the end of the platform the lifts lead to is a mesh floor with a red ? Block over it. Standing directly underneath the ? Block and collecting the Power Flower inside will cause Luigi to fall through the floor and onto a platform below. Luigi then needs to jump behind the platform into the cage below and collect the Power Star.
Names in other languages