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)
After Palkia you get Dialga
Palkia and Dialga are not in Platinum. You have to trade them from Diamond and Pearl.
Yes.
You dont palkia and dialgia get you
no you idiot
go to the spear pillar
in dimond/pearl you go back to spear pillar to get them then you give them to palkia/dialga depending on which game youre playing (dialga in diamond/palkia in pearl). in platinum you use them to summon palkia AND dialga to spear pillar.
sphere pillar.
Yes.
You can not see it
Once
You catch Palkia and Dialga at level 70 at spear pillar i think. Hope this helps you!