World 3 (Super Mario Galaxy 2)

World 3: The Far Reaches of the Universe is a world traveled to in Super Mario Galaxy 2. Like the other worlds, there are seven galaxies in World 3, including a boss galaxy, Bowser Jr.'s Fearsome Fleet. Here, Bowser Jr. launches a second attack on Mario, this time in his robot Megahammer.

Galaxies

 * Tall Trunk Galaxy
 * Cloudy Court Galaxy
 * Haunty Halls Galaxy
 * Freezy Flake Galaxy
 * Rolling Masterpiece Galaxy
 * Beat Block Galaxy
 * Bowser Jr.'s Fearsome Fleet