Heart Pillar 7
Chapter 7-1: Subterranean Vacation
Chapter 7-2: The Sealed Doors Three
Go to the 3 D-men and make them let you battle Bowser. He will rejoin your party. The D-men will give you the key. Open the Door. Keep going up on the platforms until you get to Dorguy the First. Use Tippi to "wake him up". Answer his questions correctly and he will let you through. Keep going up the platforms to Dorguy the Second. Answer his questions correctly and he will let you through. You will get to some stairs. Avoid the Spiny Tromps to the end. Above you are more stairs and Spiny Tromps. Go up and you will get to Dorguy the Third. He will make you battle the Underchomp. When you beat it, he will let you through. Hit the Star Block. END OF CHAPTER Bosses:Bowser and The Underchomp
Chapter 7-3: The Forbidden Apple
To wake up Peach, you must give her a black apple. To make Cursya the little cloud big, you must give him a red apple.
Chapter 7-4: A Bone-Chilling Tale
Boss:Bonechill