ha ha so you are a giritina seeker yes?great!Cus i know all about giritinas!geekaw!k so in order to catch him you must beat the first 7 not 8 but 7 gyms.once you've done that go to the team galactic headquarters in veilstone.looker should meet you in a warehouse nearby.talk to him.then go in the stairs beat some grunts and head up a bunch o stairs to the north.soon you will get to Cyrus and his nerdy room.a bunch of grunts will be there and once they leave follow Cyrus and challange him.he will give you a master ball if you win.you shall then go to the spear pillar.fight all the leaders of team galactic with your rival.win and head to the distortion world.find giritina.save,save,save,save!battle the awesome monster and catch him with your masterball.to get dialga come back to the spear pillar 24 hours later.same with palkia.
Spear Pillar
You Can't....
in distorshin world after beating 7 gyms
Giritina and shaymin
This is a completely an opinion question but I would say that Giritina is the best in Platinum.
Nidoking and Jolteon
you have to beat Cyrus in the distortion world
giritina, palkia and dialga
The "Griseous-Orb" is found in "TurnBack-Cave". It is item to be held by Giritina. It powers up ghost and dragon type moves and turns giritina into origin form(e).
you can't get origin form in diamond and pearl, but in platinum you can
Transfer the Arceus from Platinum that was released in a special event.
No, because Battle Revolution came out before Platinum