Bowser's Galaxy Reactor

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Not to be confused with Bowser's Galaxy Generator.
Bowser's Galaxy Reactor
Bowser's Galaxy Reactor.PNG 
Area Comet Observatory 
How to unlock Get 60 stars and complete Darkness on the Horizon 
Boss(es) Bowser 
Level(s) The Fate of the Universe 
Stars Smg icon grandstar.png 
Galaxy Icon None

“Finally! You got here just in time to see the creation of my galaxy in the center of the universe! WATCH AND WEEP! From this galaxy, I'll rule a great galactic empire with Peach by my side. It will last forever!”
Bowser, Super Mario Galaxy

Bowser's Galaxy Reactor is the final galaxy in Super Mario Galaxy. It is located in the center of the universe and can be accessed only by talking to Rosalina on the Comet Observatory. After the player talks to her, she will transform the observatory into a comet and fly it to the center of the universe, destroying some of Bowser's forces along the way.

This is where the final Grand Star is located, and as such features the final battle between Mario and Bowser. During the battle, Bowser Jr. watches from the sidelines on his airship while holding Princess Peach captive. After defeating Bowser, one of the planets near his large sun implodes and turns into a supermassive black hole, causing the entire galaxy to collapse in upon itself, after which it begins to suck up the entire universe, along with Princess Peach's Castle and the Comet Observatory as well. The Lumas all throw themselves into the black hole to reverse its effects and prevent the destruction of the universe. Afterwards, the galaxy is reformed, and Mario, Peach, Bowser, and many others land safely back in the Mushroom Kingdom.

Planets/Areas[edit]

NOTE: Unless otherwise noted, all names are unofficial.

Starting Area[edit]

The Starting Area, the Castle Wall

This is the first area that Mario encounters after entering the Warp Field inside Peach's Castle. The extensive vertical walls of this strange area appear to be part of a crumbling castle. This particular section of the level contains special Gravity Spotlights which allow Mario to walk directly up the vertical walls when the gravity field of the spotlights is entered. Several Dry Bones also patrol the area, and can trip Mario if he's not careful.

Lava Planet[edit]

Lava Planet

This planet is the first of three element planets that are encountered one after another. The planet itself is made completely of lava, though it does have multiple steel platforms rising out of the lava, along with moving sections of cooled lava which form moving pathways across the diameter of the planet. The steel platforms on the planet will begin to sink down into the lava as soon as Mario sets foot on them. The only significant obstacles that Mario will face on this planet (aside from the sinking platforms) are Lava Bubbles and steam geysers. A few coins can be found on certain parts of the planet, along with a 1-Up Mushroom. This planet is the one that explodes at the end of the game, creating the black hole that the Lumas stop.

Ice Planet[edit]

Ice Planet

This planet is similar and seemingly larger than the previous planet Mario visits, except that it is made out of ice instead of lava. It has Ice Blocks that create a path across its frozen surface. The Ice Blocks last for about six seconds before they disappear, meaning that they must be navigated quickly. The ice surface of the planet acts like lava, just like fatally cold water found in Snowman's Land of Super Mario 64.

Sand Planet[edit]

Sand Planet

This planet also appears to be larger than the previous planet and is the last element planet, but is made of sand. To get across this planet, Mario must follow moving stone paths to avoid Firebars and quicksand that results in instant death. In this sense, it is rather similar to the Lava Planet, as both planets involve a narrow, moving pathway with a deadly substance making up the remainder of the surface and fire-based obstacles. A pair of Galactic Tornadoes can also be found here, although they are of no use to Mario, for they only lead to his doom.

Lava and Water Planets[edit]

These are two unreachable planets off to the side of the element planets. One is completely made of water, and the other is made of lava.

Space Junk Area[edit]

Space Junk Area

These are blocks that float around space, but when Mario gets close to them, the glowing blocks begin to appear beneath Mario's feet, which forms a path for him to continue. If Mario stays on the platform too long, it will disappear. He must also deal with alterations in the gravity's direction, and time his movements to avoid Firebars.

Lava Tower Planet[edit]

Lava Tower Planet

This planet is a cylinder resembling a castle tower, though the inside is walled with lava. This planet has Bullet Bills, Banzai Bills, and Thwomps. Mario must travel to the end to reach the Launch Star using moving and sinking platforms while avoiding all enemies and obstacles with limited cover and a sparse supply of coins. Mario can lure Bullet Bills into Bowser Statues for Coins there. The walls of the planet have their own gravity. There is also a hidden black hole.

Stairway[edit]

The Stairway

This is the pathway toward the battle between Mario and Bowser. It consists of a flight of stairs. There are two side platforms that contain a Life Mushroom and a 1-Up Mushroom on the left and the right of the stairs. If Mario wishes to get these, he must do it quickly or the path will crumble when Bowser Jr. shoots meteors from his airship.

Bowser's Rock Planet[edit]

Bowser's Rock Planet

This is the first planet is where the first stage of the final battle takes place. It has Thorny Flowers growing on the surface. Mario can have Bowser crush the plants to get Star Bits and coins.

Bowser's Shell Planet[edit]

Bowser's Shell Planet

This is the second planet where the second stage of the final battle takes place. It has Thorny Flowers and Stretch Plants growing on the surface of it. Mario can have Bowser crush the Thorny Flowers or spin the stretch plants into the Thorny Flowers to get Star Bits or coins.

Galaxy Reactor[edit]

Galaxy Reactor

This last planet is where the third and final stage of the final battle takes place. It has coin lamps and ice crystals containing coins on the surface. The reactor is surrounded by a sphere of lava that makes up the massive sun of Bowser's galaxy. The final Grand Star of the game is hidden inside the reactor.

Enemies[edit]

Mission[edit]

This galaxy contains only the following mission.

Level Image Overview
The Fate of the Universe Bowser Galaxy Reactor Large Spotlight.png This mission's objective is to navigate through the Galaxy Reactor and defeat Bowser.

Names in other languages[edit]

Language Name Meaning
Japanese クッパギャラクシープラント
Kuppa gyarakushī puranto
Bowser's Galaxy Plant
Spanish Dimensión Galáctica de Bowser Bowser's Galactic Dimension
French Usine Galactique Galactic plant
Italian Regno Galattico di Bowser Bowser's Galactic Kingdom

Trivia[edit]

  • On the Sand Planet, it is possible for the player to reach the Galactic Tornadoes by long jumping off the moving platform and Star Spinning at the ending height of Mario's long jump. The Galactic Tornadoes do nothing good for the player and can occasionally launch the player into space, making Mario lose a life.
  • On the lava planet, if Mario (or Luigi) stands on the edge of the solid rock platform just before the next gravity spotlight beam and go into first person view and looks at the right, the player will be able to see the castle tower where Bowser is standing. Also, if the player slowly moves Mario's (or Luigi's) sight around while looking at the castle tower the player can see a misplaced gravity spotlight beam on the star under the castle tower.
  • Bowser's Galaxy Reactor is the only single-star galaxy to have its own music.