Chapter 4

Chapter 4 can refer to:
 * World 4 of Super Mario Bros. 2, originally referred to as Chapter 4 in Yume Kōjō: Doki Doki Panic.
 * Trials in the Toy Box, the fourth chapter of Paper Mario.
 * For Pigs the Bell Tolls, the fourth chapter of Paper Mario: The Thousand-Year Door.
 * Chapter 4 of Super Paper Mario, which takes place in Outer Space.