Griseous Orb
From TPPC Wiki
What it does: Powers up Giratina. Also allows you to change Giratina's forms at the Evolution Gym.
How to get it: Search the Caverns of Alph map while Giratina is in your first slot. You will see a yellow object on the map; click it and defeat the Giratina to obtain the Griseous Orb.
