With all eight Pure Hearts, the heroes travel to Castle Bleck. They encounter each of Bleck's minions but are lost one-by-one: Bowser and O’Chunks are seemingly crushed by a falling ceiling; Peach and Mimi fall into a pit; and Dimentio appears to kill both himself and Luigi. Mario and Tippi confront Bleck alone; Tippi reveals herself to be Timpani, but Bleck refuses to end his plan. The other heroes return and defeat Bleck by using up the power of the Pure Hearts. Bleck, returning to his Blumiere identity, urges the heroes to kill him to destroy the Chaos Heart and avert the apocalypse; however, it is seized by Dimentio, who seemingly kills Bleck's assistant Nastasia and brainwashes Luigi into serving as the host of the Chaos Heart. Blumiere and Tippi are teleported away, and the remaining heroes appear overmatched without the power of the Pure Hearts; however, the love between Blumiere, O’Chunks, and Mimi restores their power.