go back to spear pillar
you can find the lustrous orb inside of mt.coronet
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after you get palkia, keep walking forward from where you got him. you'll find a pokeball, and that's the orb.
You find it in mt.cornet and u find it right beside the adamant orb for palkia and dialga
Give it to dialga.
in mt. coronet,use waterfall in an part of it,go it the room to get the orb and the lustrous orb
There's no way you can. It disppears when you trade the Giratina holding it. there is no platinum,pearl,or diamond orb its called the GRISEOUS orb,adamant orb and lustrous orb
yes u can its in mt cornet
I'm sorry, :( you can onlt get the adamant orb (for dialga) in diamond a platinum. You are stuck with the lustrous orb (for palkia). Although the lustrous orb is obtainable in platinum aswell! So is the griseous orb (for giratina) which allows giratina to appear in it's origin forme outside of distortion world and it strenghthen giritina, ( as do all the other orbs. So sorry you can't.
on the way to Spear Pillar, there is a cave opening that you need surf and Waterfall to get to. Use surf, and then waterfall, and then go into the cavern. Inside you will find adamant orb and lustrous orb.
In this mountain Mt.coronet I believe somewhere around this waterfall.
palkiayou find it at spear pillar while battling glactic grunts and the commanders The only possible way to encounter Palkia before Dialga in Pokémon Platinum is to not have the Adamant Orb held by a party member or in the bag, but to have the Lustrous Orb. If the Adamant Orb is with the player in any manner, Dialga will always appear first, no matter if the Lustrous Orb is also with the player or not.