Grandmaster Galaxy

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Template:Galaxybox Grandmaster Galaxy is the final galaxy that appears in Super Mario Galaxy 2. The galaxy is located in World S. This galaxy is unlocked when the player gets all 240 stars and is an obstacle course with puzzles, enemies and Power Stars at the end. This galaxy contains two extra Stars: one for completing the level and another one for doing it again, but with only one hit point. In the last case the player gets the star from Rosalina.

Planets

Flower Grapple Planet

The first planet is where Mario must use Yoshi to swing on the flower grapples to reach the Launch Star. There are several obstacles along the way, such as Mines and Bullet Bills.

Flipswitch Planet

After using the Launch Star from the first planet, Mario and Yoshi lands on a planet with Flipswitches, with a backdrop showing moving sprites of items from Super Mario Bros.. The player must touch all the Flipswitches (while avoiding laser-firing robots) to reveal the Launch Star.

Electric Maze Planet

After landing, Mario/Luigi will find a Cloud Flower and a fan making an upward gust. Mario/Luigi must use the cloud flower to make it to the Launch Star at the end of the maze. More flowers are supplied along the way. In The Perfect Run, Mario/Luigi is stuck with this status for the rest of the level.

Hammer Bro Planet

This planet is highly infested with Hammer Bros., and Mario has to get past them to reach the other side. Rhomps are also present in this area.

The end area has three Boomerang Bros. that Mario must take out. Defeating them reveals a Power Star (or a Launch Star in the Daredevil run).

The Comet Medal for this galaxy is on the far right side of this planet, next to some platforms.

Small Planet with a House

This planet is only accessed during the Daredevil run. It's basically a small planet with a small house built on it. Mario also meets Rosalina on this planet.

Missions

The Perfect Run

The Prankster Comet for this galaxy is unlocked when the player finds this galaxy's Comet Medal, and gives Banktoad 9999 Star Bits.

Basically, the player redos the "The Ultimate Test" star, but under the Daredevil conditions. There are no checkpoint flags, and some of the Paragoombas are replaced with Choppahs.

If the player survives all the obstacles, he/she will run into Rosalina, who will thank the player.

Music from the original Super Mario Galaxy is played as well. The music that's played is from Gusty Garden Galaxy, Good Egg Galaxy, Bowser's Galaxy Reactor, and Comet Observatory, in that exact order.