Super Mario 3D World: Castle- Toad -- Captain Toad Gets Thwomped

The pipe to the left of Castle-5 leads to Castle- Toad. The level is filled with conveyor belts and Thwomps. Hop on the conveyor belts until you reach a Thwomp. There's an alcove behind it with the first Green Star. Take the conveyor belt past the Bullet Bills fired from the wall and you'll find another area to duck into on the next conveyor belt. There's a Thwomp here that rises from the ground. Stand on it to reach the second level. Walk around to the left to find the second Green Star. Go back the way you came, past the Thwomp on this level. There are a couple of Thwomps nearby that land on one of the first level's conveyor belts. Stand on the Thwomp and walk onto the other Thwomp to reach the third level. There's another conveyor belt here, with Bullet Bills firing at you. To the left of the Bill Blasters is the third Green Star. Walk to the right of the Bill Blasters and you'll find the fourth Green Star on top of a Thwomp. Walk around the corner and through the small hallway to another Thwomp. Stand on it to rise to the top level. Here, you'll find two more Bill Blasters. Carefully run down the path, in the same direction the Bullet Bills are going, to a hole in the floor. This will drop you down to the same platform as the fifth Green Star.