You have to defeat Uncle Grimly. To get there, do the following:
go to the foyer (bigging room)
go up the stairs
go in the door straight ahead
keep going through the rooms until you get to the wardrobe (room with three closets)
Uncle Grimly (ghost) will appear and disappear and when he says "Boo" and lifts up his arms you shine the light on him and suck him up like any other ghost
Go to the breaker room in the basement and flip the switch-the lights will come on
in the twins room once you beat the twins.
in the basment
walmart
trapped in a portrait on the final level of luigis mansion
Yes there will be a luigis mansion 2. Its called the elictric boogaloo
probably in the laundry room
unfortunatly, you have to beat the game 15 times. then go to options menu and choose god mode.
Suck up a Shadow Ghost until it becomes a ball and shoot it at the real ghost then you can suck it up!
you dont get luigi mansion in the day
Go to VidoEmo.com. there are plenty walkthroughs there.
poltergust 3000
no luigis mansion is on gamecube buy 1 they r cheap 30 $ or so