Chief Chilly Challenge

You may have unlocked Luigi and defeated the second Bowser Level with 31 stars to get access to the second floor. Go to the room the mirror reflection you will see Latiku. As Luigi, use the power flower and become invisible and go to the door in the mirror you'll see nothing but a secret star, then go to Wario's painting there. Once you reach the top wrap yourself inside and push Cheif Chilly into the wat 3 times and he'll give you the Wario key. Now you unlocked all characters!There's 2 stars. You need Wario unlocked for this one, since he's the only who becomes metal after getting a power flower (if you don't use it the strong wind will push you off) then break the black brick and get the star.The other is 8 red coins. Use Mario's cap and then a power flower to float to the last red coin far away then float back to the star.