In Eterna Forest.
It Is In Eterna Forest At The End
the old chateu is only in Pokemon diamond pearl and platinum versions
If you have Fire Red in your DS, go to the Old Chateu.
Pokemon 152 is rotom which can be found in old chateu in eterna forest
there are loads of ways migrating trading but my fav is hack with old chateu and lvl100 dialgas a whole party of em you get shiny dittos in old chateu works for me
go to the tv in the old chateu at night ant you will find rotom
Ghost,at least that what everybody says
ummmmmmmmmmm dude i dont think he goes anywhere just u cant see him anymore
if it is platinum go to the old chateu in eterna forest and it will be in a tv
you find him in the old chateu in the ilex forest
near the end of eterna forest
go to the old chateu and have a gba game in the ds (only works on ds and dsl) go to the room with the blinking eyes and search for ages. it works