get the last star by getting red coins
You get every green star.
Get all the star coins.
By getting every single Star coin
knock down all of the star coin signs
There is no star mushroom in Super Mario Galaxy 2.
yes
The star from super Mario galaxy is called a luma.
You can't get the red star in super mario galaxy 2
The same as on Super Mario Galaxy 1.
Star Man
You cannot get 121 stars in Super Mario 64. You can accomplish every level; get every star (including the ones in the Bowser levels), but if you get the last star (by defeating Bowswer) it won't count for your total.There are only 120.