Twisted Reality is the tenth and final world in Mushroom Kingdom Fusion. It is a nightmarish fusion of other worlds. The world boss is Legion, the main antagonist in the game, who lurks at the end of his castle and base of operations, the Castle of Meat. The game ends after the Castle of Meat stage unless specific goals have been obtained. Afterwords, the Coalition travels through various stages focusing on each member until reaching the end of the game.