once you get in the twin's room and find them, you need to have the water element in hand, you go in once they say they're ready. once you go in use the water spray on the little boxes, if it shakes a twin is in there, if it just sits still nothing is in there.
go to nana's room and beat her, the key should be in the chest
wit A dam GUN SMART 1
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
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
King Boo is the last boss
no one knows yet.