I'm waiting for an American release of that Arceus, but Giratina is my second favorite Pokemon, and it's the only way to get him in origin form, so yeah. I'm choosing him.
No it didn't, the American version just came out about two weeks ago so why would they have the event during September/October...American release came out September/November of 2009.
On topic, I am going to pick Giratina.