Beat the last level of super mario galaxy

Answer from: supershadow775
Get at least 60 stars and access the level. then you will face a trial of obstacles. the first area will be to stay on the gravity spotlights while avoiding falling and fire. the second is flame planet. on this part you have to avoid getting burned while moving across moving and sinking platforms. the third is the ice planet where you must walk along a forming path of ice blocks while avoiding falling into the icy core. the fourth is a forming block path where you must run along forming blocks. the fifth and final trial is a cylinder of fire and bullet bills. you must hop along the platforms while avoiding the lava and bullet bills. the final part is the battle with bowser. you will get shot by meteors while you move up the path so move quickly. then collect the grand star after you beat him and your done.

Answer from: supershadow775
In the fight with bowser, he will have 3 phases. his first phase is a boulder, so attack his head. phase 2 is his shell roll attack. hit the green plants into him. the third phase is like a normal fight with him, but he uses a lot of attacks.