Go into the Old Chateau and go into the 2nd last room on the right on the top floor go in and out about 5-9 times and she should be in the room on the right looking at you, and then she leaves the room. Dont bother looking for her because you wont find her ; not unless you go in and out of the room again and again.
As for the Butler do the same except go in and out of the Dining Room and he should be there on the other side of the table watching you then he'll float away and you stand there watching him lol
you have to see all the Pokemon in the pokedeks
Pokemon diamond
The ghosts can't be fought in their current forms. To beat them you have to see them and you can when you get a Silph Scope. You get the Silph Scope in Celadon City somewhere (No spoilers unless u want them)
get it from a honey tree
combee. you can see one is slouther honey on a tree.
The Ghosts appear in the dining room and in the the room upstairs in the middle door the go to the room 2nd farthest to the left. You see it in the room next to you. They appear most at night
The only way you can see all the Pokemon on diamond is by going into the GTS and global trade different Pokemon.
you have to catch all of the pokemon in diamond or SEE all of the pokemon
A Pokemon
The Pokemon you see do not go in your pokedex.
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PMMewtwo---Because it was their old mansion. and because they like been there.
There one-time ghosts in the old chateau, but these dont do anything.
No, you cannot see every Pokémon in the National Dex in Pokémon Diamond however you can see every Pokémon in the regional Sinnoh Dex in Pokémon Diamond.
for diamond and pearl there are 150 Pokemon u need to see . in plat nium u neeed to see 210 Pokemon.
You see it in the Pokemon league The champion has it
You cannot see it in the wild in Pokemon Diamond; you have to transfer it from FireRed/LeafGreen.