Template:Newsubject Bowser's Star Reactor is a place located in Bowser's galaxy from the upcoming Super Mario Galaxy videogame. This is the third Grand Star location. Mario will first walk his way to Bowser and then, Bowser will appear and will shoot fireballs at the plumber. after defeating Bowser, he will say that it isn't over yet and dissappears. Then a Grand Star will show itself to Mario.