The Fate of the Universe

The Fate of the Universe is the only mission of Bowser's Galaxy Reactor, and is the final mission of Super Mario Galaxy, excluding The Star Festival. The mission's objective is to defeat Bowser for the final time and collect the last Grand Star. 
==Layout==
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. Mario 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, after which Mario will grab his rump and run around until he jumps or spins. 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, with his phases tanking place on different planets.
====Phase 1====
Bowser retains the pounce move he had from his previous fights, with him generating shockwaves with his stomps. 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 on his tail.
===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 he and Mario fought, on a rocky platform which is sinking into the planet, and it gets heavier as the Koopa King laments his loss. 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. 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.
==Enemies==
*Dry Bones
*Fire Bars
*Fireball
*Lava Geysers
*Fire geysers
*Bullet Bills
*Banzai Bills
*Thwomps
*Prickly plants
*Bowser (boss)
Category:Missions in Super Mario Galaxy