Bowser's Galaxy Reactor
Bowser's Galaxy Reactor
Bowser's Galaxy Reactor
First appearance Super Mario Galaxy (2007)
Area Comet Observatory
Number of Stars 1
Missions The Fate of the Universe
Enemies Banzai Bills
Bullet Bills
Dry Bones
Boss(es) Bowser

Bowser's Galaxy Reactor is a Bowser galaxy in Super Mario Galaxy. It is located in the center of the Universe, and is where the final Grand Star is located.This level is where the final showdown takes place between Mario and Bowser.


The Center of the Universe

The path Mario has to take to reach the battle with Bowser is not an easy one. He starts on a small, rocky area resembling part of a castle wall. Using gravity spotlights, Mario climbs the walls and arrives at a tower guarded by Dry Bones. At the top a large Gravity Spotlight sends Mario across to the Lava Planet. He must cross this by utilising cooled lava sections moving in the opposite direction to him, and sinking platforms. A second large spotlight carries Mario to the Ice Planet at the end of the pathway. The surface of the ice planet and the lava planet both cause one point of damage if touched. The ice planet's pathway is formed by ice blocks that shoot in from space, but these vanish after a few seconds. The third planet, reached by another spotlight, is made of quicksand, which is fatal if touched. The planet is traversed by narrow platforms which move across the planet against Mario and dip beneath the planets surface. There are also Fireballs in the way. Yet another spotlight takes Mario into a space junkyard where platforms shoot in to form a path and shortly vanish, like on the ice planet. However, gravity arrows and Firebars provide tough-to-navigate obstacles. At the end of the pathway, a gravity spotlight allows access to the Castle Tower, a hollow, cylindrical planet made entirely of lava, stone and metal. Bullet Bills, sinking and moving platforms, Thwomps and Banzai Bills all create a treacherous terrain for Mario. At the end, a launch star takes Mario to Bowser's Final Stand.

Bowser Jr. appears on his airship at the bottom of the staircase leading to where Bowser stands with Princess Peach on board. He taunts Mario, then flies behind his father and begins shooting down the staircase with meteors. Along the way there is a 1-up Mushroom and a Life Mushroom, but grabbing them takes up valuable time. After Bowser explains his plan, the gravity of a nearby metallic planetoid attracts him and Mario. He transforms into a boulder with his head sticking out of the top. If his head is hit by a spiky bush or Mario's spin attack, he will fall out of the boulder, and must be hit again to take damage. After he is hurt twice, Mario and Bowser will fly to another planetoid. Here, Bowser transforms into a ball made of two of his shells. He then rolls around the planet. Mario must Star Spin into sling plants to knock Bowser onto his back, and then Star Spin him. After doing this twice, Mario and Bowser will fall towards a giant Sun, one of the biggest in the game. It is however, hollow, with holes, and the two combatants will fall through one of these to land on the reactor at the center.

Here, Mario fights Bowser in a similar way to how he does in Bowser's Star Reactor and Bowser's Dark Matter Plant: on a reactor planetoid that resembles a Mario Strikers Charged ball; except Bowser has the attack he used on the second planetoid, which Mario can only avoid. After hitting Bowser twice, Bowser will fall out of the reactor's gravity field and into the Sun. A Grand Star will then be revealed from inside the reactor, which the player takes. As Mario flies away with the Grand Star, Bowser Jr.'s airship plummets towards the Sun, but Mario rescues Princess Peach and flies her to the area where he first entered the Galaxy. It is then revealed that Bowser has survived his fall into the gigantic Sun, but is stranded on the second planetoid upon which he fought with Mario, on a rocky platform which is sinking into the planet. As its gravity and mass increase, the planet sucks in more and more rocks from around it, then collapses under its own weight, becoming a giant Black Hole[1]. It begins to suck up everything around it including Mario, Peach, Bowser's Airship Fleet, Peach's Castle, and the Comet Observatory. It would appear that everything is lost until Mario's (or Luigi's) Luma pops out, waves its arm and zooms toward the black hole. It is soon joined by all of the other Lumas. The Lumas twist the Black Hole into oblivion, and this results in the resurrection of the Universe and the safe landing of Mario, Peach, and Bowser in the Mushroom Kingdom.


  1. YouTube - Final Boss + ending : Super Mario Galaxy