Can you get the adamant orb in Platinum?

Answer 1

Both Orbs can be found in Mount Cornet in Pokemon platinum. Bring a Pokemon that knows waterfall and surf, and follow the usual path to get to Spear Pillar. However, when you get to the wall where there are two rock climbs in a row (it's outside, close to where Spear Pillar is, I believe), only climb the first wall. Head right, and surf in the lake. Use waterfall and then enter the cave, and you'll find the orbs.

Go to Celestic Town and look at the Ruins. (Make sure you have caught/defeated Heatran first and gained the National Pokedex.) Cynthia will come and talk about the Pokemon. You will then be able to catch them at Spear Pillar. Enter the Blue Diamond thing, and you'll fight Dialga. Leave Spear Pillar, come back, and a pink portal will be there. From there, you will fight Palkia.

No!You dont have to defeat/caught Heatran

You must get the two orbs and talk to the old woman at celestic town

I HAVE TESTED IT AND IT IS TRUE

THANK YOU