The Mush-Room. It's a big room with a lot of 1-UPs in it.
enter the 32 Star-Coin door to toggle between Mario and luigi
On what level?
Just a shine spirte. And yes you are doing all this work for just a shine spirte.
by paying 5 star coins
Yes
in your neck
By getting every single Star coin
knock down all of the star coin signs
the catle how do you get a star and sunshine
you beat the game and collect every star coin
Nothing, the only thing you can do with the star coin it's to buy the video in Peach Castle.
You have to defeat Bowser in the 80 star door on the 4th floor