How do I get rotom on pokemon diamond?

Question

It says that I have to go to the old cheateau after geting the national dex. Where is the Old Cheateau?

Answer 1

old chateau is in eterna forest pretty deep in there and u'll need to go there at night then u go to the TV upstairs and u talk to it then a Rotom comes out

hope it helps

Answer 2

The old chateu is in Eternia forest near Eternia city. Fly to Eternia city and travel west into eternia forest. You couldn't miss it if you tried. You need a pokemon with cut. You will run into the gym leader, she will talk and leave. Go into the house go upstairs and go into the second room from the left. Wastch the tv and rotom will appear. It's at lvl. 15. But it's still hard to catch. Use somthing with false swipe.