How do you get the star after you defight the big boo on super mario 64 ds?

I have this game for my ds and i defighted the big boo (Big boo's balcony level ) and i cant get the starHow do you get the star after you defight the big boo on super mario 64 ds?Well when your on the balcony.

There should be a red ? block.

And if your Mario, which you have to be to be able to get up there.

You just hit it and its the float power flower.

And you can just float up :)How do you get the star after you defight the big boo on super mario 64 ds?If this is the level where you fight Big Boo and then the star appears on the roof you will have to back flip onto the roof other wise you will not reach it.How do you get the star after you defight the big boo on super mario 64 ds?You need to hit the ? Block (if you got there, you already have it) as Mario. If you're someone else, like Luigi, get a Mario cap.