How do you get a Palkia Dialga and Giratina?

Answer 1

In Pokemon Platinum, you go to Spear Pillar at the very top of Mount Coronet. (You don't have to get beat the Pokemon League for any of this) Than, there should be a portal. Go through it into the Distoration world. Be sure have brought Ultra Balls, Master Balls, or stuff to catch Giratina. Than, after getting through, battle Galactic criminals (Including Cirus) Giratina should be at the end. Save before battling him (Unless your using a Master Ball) Than go through the next portal back to Spear Pillar. Return anytime later and Dialga and Palkia well be there (I forget if they appear before or after going through the Distoration World) After catching 1 the other will disappear. Return again after talking to an old lady about Palkia/Dialga (Depends on which one you caught) than he will be there. And always remember to save before battling any of these Pokemon. Hope this helps!