You must transfer it from Pearl
You need to trade it from pearl it's not avalible any way else
To get theLustrous Orb click where Palkia was standing.
From Dialga and Palkia. They are holding it when you catch them.
You get it in Mt coronet
Yes, all you need to do is bring either a Lustrious Orbor Adament Orb to Spear Pillar (where you find Giratina the first time, and also where you see Palkia/Dialga in Pearl/Diamond). Whichever orb you bring to the Pillar will effect the Pokemon that appears there. (Lustrious = Palkia | Adament = Dialga)
im sure you have to have the natinial pokedex
it is hidden in mt.coronet in a cave you need hidden move "waterfall" to get it though
When you are on your way to spear pillar, yo should go through a cave with a waterfall in it. That waterfall leads to a small cave. The Adamant orb and the Lustrious orb should be in there. But before all of this, get the national dex. after all the above is done, go to spear pillar and there should be 2 diamond things floating and click on one of them and you'll run into them. (Pink diamond= Palkia and blue diamond= Dialga
Your talking about Palkia's orb?, No Ar codes for that in Diamond.
The prefix of "lustrous" is "lustr-".
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
the orb is for dialga to boost his steel and dragon moves