you cant now...
You unlock a place where Rotom can change its forms.
Rotom can change forms in platinum
give him a secret key the different secret key the different rotom
You do not go anywhere in "Pearl" to change Rotom's forms because you can't change its forms in "Diamond" or "Pearl." Rotom is only capable of changing forms in Platinum, HeartGold, SoulSilver, Black or White.
They are rotom forms they are in the old mansion.
You don't spazz that's platinum
you can't rotom has five different forms, which are only in platinum, with an event.
It changes Rotom's forms, but it only is in Platinum.
You can't the only way you can is trade it on a previous version of Pokemon (example: Platinum , diamond etc) Then when you have rotom you can go in the lift in silph co in saftron city and change its forms :D
You dont you find him in different forms tell your freinds im only 8 and i now everything about pokemon my name is wyatt
the same with 5 forms of rotom and 2 forms of giratina and a new shaymin
yes, the other forms of rotom and giratina's origin from