Why are there ghost people at the old Chateau in Pokemon platinum?
To scare you Ah, ha, ha! And to make it seem like a Haunted House, when I saw the ghost girl I shortly fainted! and they their on Pearl and diamond
At night (8pm-4am) in the eterna woods right next to eterna city there is the old chateau. You need to use cut to get in. Go into the old chateau and go up the stairs. One of the room has a tv in it. Press "a" facing the tv.Sometimes rotom is in the tv. Rotom is a ghost electric type at either level 15 or 20.