In Pokemon Black for the DS, you need to give the Griseous Orb to Giratina in order to make it change to its Origin Form.
You obtain the Griseous Orb from the Shadow Triad on Marvelous Bridge.
About DoubleDizle
Gamer, Software Engineer, Web Developer, Professional Geek
You also might be interested in
Terrakion is a special pokemon that you will only encounter[...]
Tornadus is a Pokemon Black only pokemon that can only[...]
Dragonite has been around in Pokemon since the beginning. While[...]