Supermassive Galaxy

Supermassive Galaxy is a galaxy of World 4 in the game Super Mario Galaxy 2. Supermassive Galaxy depicts many common Mario enemies and elements at an extraordinary size. Some include Piranha Plants, Lumas, coins and Platforms. The concept can be compared to that of Giant Land from Super Mario Bros. 3 or the 'Huge' part of Tiny-Huge Island in Super Mario 64, in which enemies, blocks, and other objects were also giant compared to Mario himself. Mario can traversing across giant Warp Pipes and Blocks. Mario can use the drill to attack the giant enemies here. Many enemies here include Grand Goombas, Grand Paragoombas, Piranhacus Gigantici, and Wigglers. There is a Secret Star that involves Mario taking a hidden launch star and planting flowers on a barren planet by walking.

Starting Planet
The starting planet is an area made of Brick Blocks. A giant Luma is found on it. Mario will encounter several giant enemies such as Goombas, Piranha Plants and Thwomps. Most of them are invincible. The Comet Medal can be found near one of the giant Goombas. There is also a giant Warp Pipe serving as an elevator and a giant Coin which Mario can do a Wall Kick on it to process. The Launch Star can be found near two Thwomps.

Giant Koopas Planet
This circle-shaped planet is the second planet Mario visits. It has three giant Koopa Troopas walking around it. Mario must use the Spin Drill found on it to defeat them. Mario's battle strategy against them is similar to Raphael the Raven's battle in Yoshi's Island.

Huge Trouble with Big Wigglers
To get this Power Star, Mario must make his way to the Stone Planet. To do so, he has to get past the giant enemies in the first planet and use the Launch Star near the two giant Thwomps. On the next planet, he has to use the Spin Drill to defeat the giant Koopa Troopas to make a Launch Star appear. After using it, the plumber will find himself on the Yellow Platforms Planet. Here, he has to get past the giant Piranha Plants until he reaches an area full of yellow moving platforms. The platforms will disappear as time progresses, so he has to make his way to the Launch Star carefully.

On the next planet, he only has to take the Launch Star in this mission. After using it, he'll get to the final planet. Here, he has to use a Long Jump and get past the big Wigglers. The Power Star is found at the end of the planet.

Big Wigglers Speed Run
The player has to do the same thing as the first mission. Only, he must get to the Power Star within three minutes.

In Full Bloom
Mario has to undo the first mission, only, when he gets to the Flower Planet. He has to walk around it to make flowers grow up. When all the planet is surrendered by flowers, a vine will grow up allowing Mario to get the Power Star.

Trivia

 * The background music heard in this galaxy, is a remix of Super Mario 2007, originally heard in Toy Time Galaxy from the predecessor Super Mario Galaxy.