Defeat Bowser in the fire world to get the key to go upstairs. Go upstairs. Head to the left and you will see a door with a star on it. Enter it to go to the mirror room.
you have to unlock luigi then find the mirror room then your in!
If you mean the mirror room where you unlock Luigi (in Big Boo's Haunt) when you fall to the room, just go forward and touch the mirror with Mario, then wait. You'll have to battle King Boo to unlock him.
you have to be on it for exactly 5 hours then unlock it with a secret code
you have to unlock luigi,then go the mirror room .then get the flower and pass tru the mirror and get in the door.
You have to unlock Luigi and then use his invisibility power to go through the mirror, if thats what you are asking.
Get 30(31stars after beating second Bowser)then go to the top room and powerflowers are there(works on Luigi)then go in the mirror(in mirror room)then go into the Wario Picture.
You have to win either all of the Mirror Nitro cups or all of the Mirror Retro cups to unlock ROB. To unlock Mirror Mode, you need to win every 150cc cup.
To unlock Mirror Mode, you have to place 1st on every cup in 150cc.
First beat 150cc. You should of unlocked 150cc mirror. If you beat 150cc mirror you unlock R.O.B.
You unlock Dry Bowser
no
you get gold on every thing 50cc-150cc.when you get gold on the lightning cup on 150cc you unlock mirror.