probably in the laundry room
In the birdhouse on the outside of the mansion by the rec room.
in the washing room
in the room just north to the butlers room, its in the washer
in the twins room once you beat the twins.
Yes there will be a luigis mansion 2. Its called the elictric boogaloo
One boo is in every room but sometimes two boo's are in a room
your suck up sue pea by sprinkling water on her bed
in the basment
No hopefully Nintendo will give luigi another game that has you saving Mario or something like luigis mansion.
trapped in a portrait on the final level of luigis mansion