Super Mario Galaxy
From Mario - NeoWiki
Super Mario Galaxy is Mario's newest adventure on the Nintendo Wii. It's the 3rd 3D Mario game in the series. Instead of taking Mario through Mushroom Kingdom as usual, you will be taking him through the whole galaxy, as the name suggests. Luigi also appears as a playable character and can be unlocked by collecting 120 stars with Mario.
Plot
As Mario is invited to a Star Festival to celebrate the comet that passes by, Bowser comes in with a surprise attack with all his air ships and takes Peach including the whole castle away flying away in space, Mario doesn't let him go easy so he follows him but Mario was no match for him and gets sent flying off to another planet. On the planet he see's all these star's and he meets another Princess named Rosalina. She tells Mario about the trouble she is having and that it might be connected to Bowser. So Mario goes around the star observatory, the comet where Rosalina and the Lumas are, and restores star's that will power up the observatory.
After obtaining at least 60 stars of the 120, the star observatory has enough power to travel to the center of the universe where Bowser lays. So he travels there and when you meet Bowser you find out he is trying to take over the Universe! Instead of just the Mushroom Kingdom most of the times this time he is going to take over something far bigger. So Mario goes into a Battle with him and destroys his planet, causing a darkhole, All these Luma's sacrifice themselves to stop the darkhole. Rosalina stats to Mario that the Luma's never die, they just get reborn as new stars. Mario lands back on Mushroom Kingdom with the castle in the normal spot and Mario, Peach and Bowser laying on the ground unconscious. They wake up and then after a short little cut scene the credits roll.





