Bowser's Galaxy Reactor is the final galaxy of Super Mario Galaxy. It is located at the center of the universe. Bowser makes his final appearance here.
Like Gateway Galaxy, Bowser's Galaxy Reactor is not accessed by a dome. Instead, it is access by talking to Rosalina with enough stars on the Comet Observatory. The Comet Observatory, fueled by the Power Stars it was fed, will turn into its spaceship form and fly there. Mario must fight Bowser to save Princess Peach.
Planets[]
Starting Planet[]
As is typical for a Boss Galaxy, the Starting Planet has downward Gravity. It slightly resembles a collapsing castle wall. There are Gravity Spoglights whose gravity Mario can use to make his way to the next area.
Elemental Trial Planets[]
These three planets are visited en route to Bowser.
Fire Planet[]
This Planet has earned its name since it is covered in a sea of Lava and has a lot of fire. The Fire Elemental Planet is about the same size as the reactor itself. To go to the ice planet, go to the cooled sections and the wheel turning the wrong way. Go past it, and then, you can go to the spoglight.
Ice Planet[]
The Water ocean covering this planet behaves like Lava, damaging anyone who tries to swim in it. It is the same size as the Fire Elemental Planet. Go to the ice and run to the spoglight.
Desert Planet[]
This small planet's main hazard is Quicksand, although it is easily avoidable. Mario must make his way across the sand barge to the Gravity Spotlight.
Cosmic Platforms Planet[]
This small planet is actually a Gravity Wall floating in the void. Due to the gameplay, it cannot be walked on. Mario can use the Cosmic Platforms to make his way through the area it is located in.
Tower Planet[]
This planet's walls have their own Gravity, so Mario can climb to the top on his way. It sits above a Black Hole.
Bowser's Stairs[]
This planet is a long staircase leading to Bowser. It is about as long as the Tower Planet. As Mario makes his way up, Bowser will tell his men to blow up the staircase. This will cause Mario to fall into a Black Hole if the player isn't fast enough.
Bowser Battle Planets[]
These planets share their size with the Elemental Trial Planets. Mario fights Bowser here. On the first planet, Mario must spin at Bowser's head, and spin him again. However, if you don't want to be too precise, just lure Bowser to the spike plants. Spin him after that. Either way, you will go to the next planet. Use the bulbs to KO him, and spin him. Last planet, here.
Bowser's Galaxy Reactor[]
This is where the final showdown's climax occurs. Defeat him like in the other reactors. And dodge Bowser's transformation of turning to a ball, other than that, it's relatively easy. Take the grand star.
Missions[]
There is only one mission in this Galaxy: The Fate of the Universe. Mario has to make his way to the galaxy's core, where Bowser runs his operations. Traps will appear to slow Mario down, as described in the Planets section above. At the centre, Mario and Bowser square off, leaping from planet to planet during their struggle. Finally, Mario is able to send Bowser flying out of his own incomplete sun.
Trivia[]
- Bowser's Galaxy Reactor's music is unique. The other two boss galaxies use a remix of Bowser's Road from Super Mario 64, but Bowser's Galaxy Reactor's theme is similar to Super Mario Kart's Rainbow Road theme.
Walkthrough[]
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 makes his way up 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. Junior taunts Mario, then flies behind the platform his father is standing on 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. Bowser explains his plan, and then the gravity of a nearby metallic planetoid attracts him and Mario.
Final Battle[]
Bowser is fought in three phases.
Phase 1[]
Bowser retains the pounce move he had from his previous fights. 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 Star Spin attack, the Koopa King will fall out of the boulder, and must be hit again to take damage. After he is hurt twice, he and Mario will fly to another planetoid.
Phase 2[]
Here, Bowser reuses the fireball attack. For his roll attack, Bowser transforms into a ball made of two of his shells. After transforming, the Koopa King 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.
Final Phase[]
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. Mario must wait until Bowser performs his pounce attack, and then lure him onto a blue plate to make him stun himself, then attack him. Damage is ignored while Bowser is still running around trying to put out the fire.
Aftermath[]
After he suffers damage equal to two spin attacks while knocked flat on his back, 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 Mario and Bowser fought, on a rocky platform which is sinking into the planet, and it gets heavier. 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 his arm and zooms toward the black hole. The other Lumas join him. 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.