Where to get Palkia and Dialga in Pokemon platinum?

Answer 1

Ok,after beating the league go to the celestic town then ask cynthia's grandmother the she will tell you a story go to the m. coronet and you'll find the adamant orb and lutrous orb but search in YouTube it's hard to explain then go to spear pillar aftwer getting the two orbs the when you got to the spear pillar to poratal will appear the right side is palkia and left side was dialga hope this help

Answer 2

First get the national dex and beat the elite four then talk to cynthia's grandmother and she will talk about her finding a book in mt. coronet about seeing dialga and palkia then get the adamant and lustrous orb then go to spear pillar and you will see a blue scar in the space talk to it and and dialga will be there.then go out of spear pillar after you fight dialga then go back in and this time there's a pink scar in the space talk to it and challenge palkia. (if cynthia' grandmother doesnt talk about the book go to dawn and do as dawn says and if she says cynthia's grandmother was looking for you that's when you talk to cynthia's grandmother.