Super Paper Mario/Chapter 3: The Bitlands

Heart Pillar 3
The Void! The Void is bigger! We can't worry now. We need to find the heart pillar! Remember the sign in the outskirts? Go past it to a pipe covered with red blocks. Use Boomer to Get rid of them and go down the pipe. Go all the way to the right until you hit a wall. Flip and use Slim to slip through the crack. Your atthe heart pillar! Go back to Flipside Tower(Shortcut:Use the Return Pipe).

Chapter 3-1: When Geeks Attack
Boss:Bowser

Chapter 3-2: Bloops Ahoy
Boss:The Big Blooper

Chapter 3-3: Up, Up, and a Tree
Boss:Dimento

Chapter 3-4: The Battle of Fort Francis
Boss:Francis