you can't trade the Griseous Orb. When you try it stay on the cadridge you have to find yours there is only one per game. (not in diamond and pearl) If you play platinium you have to go to a secret zone to return to the distorded world. If it is Soul or Gold you have to choose Giratina as the pokémon to be created with the arcueus event else... you will not never have access to the item. (except if you have a Arcueus that came from the hall of origin)