Catch Palkia and Dialga
After you have beaten the Elite four go to Mt. Coronet and go half way up the mountain. You will see a door on the right, go through it. You will see a little patch of water on the left use surf and you will see a waterfall use waterfall and you will see a door way go through it you will see two items. Pick them up but don't leave yet go to the stone in the middle and click on it to get another item. After getting the items go to Celestic town and talk to the old elder women in the bigg house above the cave. She will tell you what the orbs are for. Then go back to the mountain and go to where you first saw palkia and Dialga. You will see a blue exclamation mark click on it and you will be in battle with Dialga. After either catching or beating Dialga go back into the cave and come back out you will now see a purplish pinkish exclamation mark click on it and you will be in battle with palkia. There you go!
More tricks, tips and cheats for this game are right here - Pokemon Platinum cheats
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