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.
don't no really
to get to the mirror room you have to go through the door on the top floor of the castle. then you go in one of the doors with a star on it!!! :)
you have to unlock luigi,then go the mirror room .then get the flower and pass tru the mirror and get in the door.
hit a ? box or go to the mirror room
You have to unlock Luigi and then use his invisibility power to go through the mirror, if thats what you are asking.
It is talking about wario's painting. Be Luigi to get it.
Go through the mirrors in the mirror room!
Go to the room with the huge mirror as Luigi and grab one of the flowers and jump through the mirror, then jump into the painting with Wario on it.
there is no mirror key. using luigi go to the mirror room, grab a power flower, and you can go thru the mirror no u cant it doesnt work
The one in the mirror room on the floor with wet-dry world in it. The mirror shows a cool, cool mountain painting that isn't actually there. The mirror room is the one with the five pillars.
You get luigi and you get the flower on the pillar and then you exit the reflection of the door in the mirror
You go into the mirror room as luigi then get the flower so you are invisible.Walk into the mirror then the picture of luigi on the other side would be wario inside.Jump into that and beat the boss. .