You go through the levels and collect the coins as you go. That's how!
Get all the star coins.
If you collect them all they access secrets.
Yes there is (You have to earn all the star coins)
finish world 8 with all star coins
you have to get all the star coins in world one
You have to collect all 3 Koopa Coins in every level of that world.
Beat the game and get all of the big coins in all of the worlds and do the levels
look everywhere! {they might even be in the walls or secret exits.}
Peach tells you and you immediately can go!To play you have to get all the star coins.
you have to get all the star coins and finished the game then go to the mini mushroom house.
collect all the star coins from each world to unlock the ninth one
You can look for all the star coins or find all the secrets and do some levels you haven't done yet.