You have to make it to the spear pillar to do that you have to beat team galactic a lot of times.
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
go to the spear pillar
no you idiot
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.
You can not see it
Yes.
sphere pillar.
Once
You cannot catch palkia in diamond and dialga in pearl but you can catch both of them in Pokemon platinum