there are no real days as to when you can catch rotom just go to the Old Chateau at night and look into the television and rotom will appear. i have caught it at night so it should work :3
No. You can only catch Rotom once.
You can't catch Rotom in heartgold.
Actually, you can only get Rotom by trading in Diamond, Pearl, or Platinum at Toys R Us.
you can catch rotom next to the old cheatu on route 205
Rotom wasn't created until Generation IV, so you can't; the closest would be Missingno. The only versions on which you can capture Rotom are Diamond, Pearl, and Platinum.
There is no specific ball needed to catch Rotom, use whichever ball you want.
You can catch Rotom only at night. you have to catch him between 22:00 and 4:00
You go to the old chatuea in Eterna forest. Go to the middle room upstairs and then the room with the TV. Rotom's in the TV. It is only on level 15.
catch rotom!
You can catch Rotom.
You can catch the same Pokemon you can catch in diamond only now you can catch shaymin in 2 different forms,catch giratina in 2 forms and rotom in 5 forms.
are you referring to the haunted house in eterna woods? if it is, there is a Pokemon you can catch inside but only between 8pm to 4am and you need to find the television in the back of the house. once you are there and it is the time you can catch it, then thump the television and you can catch rotom. rotom is at level 20.