you get the 2 orbs and then go to spear piller
Yes.
== ==
It sure is
In Diamond and Platinum, Dialga is in Spear Pillar. If you want to get Dialga in Pearl, trade Dialga from Diamond.
If you beat Dialga and Dialga faints, you can no longer catch it.
No you cannot. You can only catch Dialga in Pokemon diamond and platinum. Although you can only catch palkia in pearl and platinum.
it's impossible, and I have action replay
Palkia and Dialga are not in Platinum. You have to trade them from Diamond and Pearl.
At spear pillar.
No.
After Palkia you get Dialga
yes