This thread is to discuss about the Old Chateau ghosts.
First, all the known information:
Real people ghosts:
Little girl - To see her, go upstairs to the middle room and then go to the second room from the right (the one with the eyes on the wall). When you enter, a little girl should appear on the room on the right, turn around and float (because her legs don't move) to the door, disappearing. If you don't see her, exit and enter the room again until you do.
Butler - Go forward to the dining room and you will see an old man at the other side of the table, who will then float to the left and then disappear. If you don't see him, exit and enter the room again until you do.
Pokémon ghosts:
Gastly are seen everywhere in the mansion. Haunter and Gengar appear less often if you have a GBA game inserted in your DS. And, finally, Rotom appears after obtaining the National Dex if you watch the TV closely during night time.
Mysterious "ghosts"
The picture in the room where you see the girl has red glowing eyes on it, staring at you unless you approach. When you leave the room and go to the other ones, the eyes will follow your direction. Apart from the eyes, there's the statue at the entrance of the dining room that "appears to be staring at you".
Theories
I heard in this forum a theory about these ghosts. Supposedly, the chef poisoned the food and killed the little girl and the old man, saving himself with an Antidote found in the kitchen.
I have some things to add to this theory. I think the little girl was NOT killed. The TM Substitute found at the room where the girl is can tell another girl was killed instead. Also it's strange that, the Old Gateau, which cures status ailments, wasn't used. But, in my opinion, this was what the real girl used to save herself. Maybe the girl is someone else in the game, she could even have grew up because no one says when this happened. Because there are no clues, it could be anyone, even Cynthia or Dawn (assuming the male character is the main one).