Rightside Down Galaxy

Rightside Down Galaxy is a galaxy that appears in Super Mario Galaxy 2. The galaxy features gravity changes, represented by arrows in the background, much like the later Upside Dizzy Galaxy. Part of the galaxy may be played upside down, frontways (which is visually the same as a top-down view), and other directions. Enemies that appear in this galaxy include Goombas, Paragoombas, Purple Piranha Plants, Thwomps, and Chomps. The music changes depending on the direction of gravity. The Fire Flower makes its first appearance in this galaxy.

The outside of this planet has four structures shaped like wooden toys and has a warp pipe leading inside the planet. The inside of this planet is made up of wooden blocks and has the gravity that changes depending on Mario's actions or the place where he is standing. The Toad Brigade is found here. A Warp Pipe in the ceiling leads to a small area with a Fire Flower and crates. Hidden in one of the crates is another Warp Pipe that leads to the Mini-game Planet.

A Gearmo inhabits this planet and asks the player to use the Fire Flower to burn all the crates in twenty seconds for a Power Star in Crate Burning, similar to the Bob-omb Blasting mini-game in the first game. The fireball can go through several crates at once.

Enemies

 * Thwomps
 * Goombas
 * Octoombas
 * Swaphoppers

Breaking the Laws of Gravity
Mario must traverse the planet avoiding the enemies and shifting gravity. At the end he must use a Fire Flower to burn some crates and reach the star.

The Great Crate Incinerator
Mario must change the gravity to reach a pipe in the ceiling near the beginning of the level. There, he must burn some crates with the Fire Flower to find a pipe that will take him to a planet full of crates where he can ask a Gearmo to burn them in twenty seconds in the Crate Burning mini-game to get the Power Star.

Green Star 1
Green Star 1 is located right after the third checkpoint and right before the green blocks area. Getting the star requires a well-timed jump and spin from the green block area.

Green Star 2
Green Star 2 is found in the second Thwomp area (the one near the Power Star). One must jump on top of the last Thwomp and them jump over to the Toad next to the crystal of Star Bits. The star requires a really high jump to get, which the player can do by doing a Side Somersault to the wall, Wall-Jump, and spin.

Trivia

 * After the green pathway section, one can backflip onto the side of the whole planet and find a 1-Up Mushroom in each of the four corners.
 * The background of the house in the start of the level, right after the player has entered the Warp Pipe, is very similar to the Palace of Shadow as shown in the intro of Paper Mario: The Thousand-Year Door.