once you have completed the game as Mario and beaten bowser at least twice go on the menu then press the switch that has the Mario and luigi heads on it and you will become LUIGI
You get every green star.
throw
you have to get every star, green star, prankster comet and comet medal
There is no star mushroom in Super Mario Galaxy 2.
You can't get the red star in super mario galaxy 2
You go to the Trial Galaxies and talk to the green star.
The same as on Super Mario Galaxy 1.
It's a hidden star and can be found by simply going to any level
To get green stars, you go through each level and look for green stars. You can also listen for the star "sound."
The star from super Mario galaxy is called a luma.
Just 3, including a green star at the Battlerock.
The "star" that floats next to Rosalina is called a 'Luma' the Lumas are from Super Mario Galaxy. And Super Mario Galaxy