How do you get Dialga and Palkia in platinum?

Answer 1

first you need to beat the game. then you need to get the orbs for them in mt. cornet. then go back to the spear pillar with the orbs at hand and palkia and dialga should be there.

thx

Answer 2

If I remember correctly, You have to beet the elite four, go back to the spear pillar and find two diamond things with the colors pink and blue on it. Click on it and battle! Please don't freak if you don't have a master ball you can just use a quick ball at the begginning of the battle, and remember you should bring bring at least 2 quick balls, I learned the hard way sorry to hold you up but one more thing I'm sure quick balls aren't the only way it's just what i did, and i caught both!

You need to go to Mt. Coronet through Celestic Town, go up and eventually you will get to the top to fight team galactic, then Dialga and Palkia will appear, then Giratina.