It is in the forest you pass through to get to Eterna City.
ROTOM! you can find the plasma Pokemon in the tv of the old chateau!!!
The old chateau is in diamond and pearl
no
there is no such thing as a new chateau but there is an old chateau in eterna forest.
There one-time ghosts in the old chateau, but these dont do anything.
The Old Chateau is where you find the Legendary Pokemon Rotom
The only Pokemon you can find in the old chateau are gastly and Rotom.
the old chateu is only in Pokemon diamond pearl and platinum versions
it is an item that heals any status problem
Yes, in the old chateau, but it is called the "insect plate".
There is no granny in the Old Chateau in Pokemon Diamond. The only NPCs that appear here are two ghosts you can't interact with.
you can find him at lost tower,or old chateau