Flopside Tower is the black tower located at Flopside. There is one large black door on it, leading to Castle Bleck, the final chapter in Super Paper Mario. Flopside Tower is built like a T, and is black instead of white,
unlike its counterpart in Flipside. It is also the largest structure in Flopside. During the heroes' journey through Castle Bleck, Merlon and Nolrem witness The Void destroying Flopside from this tower.