you don't catch it you have to trade it with someone that has it on diamond or pearl
you have to have arceus, then go to the ruins of alph and a guy will show up
Its shinjo ruins and you need to bring only arceus to the ruins of alph and you will find cinthia and she will bring you there
Smash all the rocks you can find (that you are able to do) and it will be inder one of them.
You must travel through the Union Cave. By surfing in different areas, you will soon find a new path. That path leads to the Ruins of Alph and the girl.
You need to use rock smash at the ruins of alph. If you're lucky, you will find a fossil.
there are a few ways they are :Shinto ruins that's in near the ruins of alph what you have to do is trade arceus to soul silver and take to the ruins of alph go through some kind of door not sare witch one but its in the ruins of alph and a man will bump into you not sare wat to do then jus talk to the man and follow him but at one point some one asks you if you want palkia dialga or gratina.trade at the gts (you have to see him first)trade from diamondtrade from pearltrade from platinumget it in a special event
You will need an Arceus which you can get by event. Then go to the Ruins of Alph and go to the house with Arceus first in your party. Then a man will come out and let you inside the Ruins of Alph. When you finally get to a cave that has snow on top of it, you will find Cynthia in there. Then you can choose Dialga,Palkia,or Giratina. Level 1. Hope this helped you.
When you complete all the puzzles in the ruins of alph a guy will give you the unown report, when you catch all the unowns go to the house in the ruins of alph and give it to him, he will let you battle arceus LV.70.
Steven will never appear in the Ruins of Alph.
you have find to get an old amber while breaking stones usually in the ruins of alph and revive it in the museum at pewterIn the Ruins of Alph area, use Rock Smash. Although fairly rare, you can get Old Amber. Take that to the museum in Pallet Town to get your Aerodactyl.
go into the smaller ruins and slove the puzzels on the wall. The floor will open and you will fall into the ruins of alph. You will then find unown in the ruins.
you must get arceus at lv 80 + and go in rains of alph in the house.after you must select palkia dialga and geradina at lv.1