who do u have to beat to catch the giratina pokemon and were do u find him?

in Pokemon Platinum you need to go to Mount Corrnet and go threw it until u reach the sky pillar, than u must defeat the Galactic Grunts untill u defeat Juniper and Saturn (some kind of galactic ppl) then go into the distortion world then defeat the distortion world and get to Cyrus. Then u defeat Cyrus again and battle Giratina u then catch him. Personaly i'd save the master ball for Mesperit and catch it w/ a ultra ball. If u r catching it in Diamond then u must go threw turnback cave! good luck

go to the distoration worl at spear piller and go threw the maze anad then battle cyrus then giratina origin form lv.47

you have to beat the galatic boss cyrass or something then you find him in the reverse world ao torn world people say but you have to find your way through the torn world to get to giratina