No. there is only one, and it's nature and stats will always be the same.
No.
U catch them
Change Rotoms form
no not at all
go to the lift with a rotom then rotoms electricity you go up the lift, change rotoms form and go back down again
NO
I don't think you can.
You can only get Rotoms other forms on Pokemon platinum by getting the secret key over via wireless in summer 2009.Go then to the eterna galactic base and press A on a certain wall area to unlock a speical room were all rotoms forms are. In the card game i dont know but i do have 2 frost rotoms :)!!!
you can't you can only change it in platinum
a lawnmower, a frige, a microwave... I forget the rest.
you can only get one rotom in the game
1 unless you breed