none, you can find on on route 214 in the northeastern area next to Collector Jamal.
in Velistone city
If you mean diamond & Pearl, then in Diamond, Dialga and in Pearl, Palkia
HM04
Veilstone City
in the cave with big boulder
It is the Lustrous Orb. Give it to Palkia to power it up.
get 2 ds' and in pearl when you turn the ds on go to the bottom right that says ds wireless communications and then in black go to route 15 and there is a big building where you can transfer your Pokemon to pearl
You can't get diagla in Pokemon pearl without trading but the way to get him in the pearl pokedex is by going to celestic town and going into the big house and talk to the old lady. Only AFTER you beat the Elite four.
none but u can get ur Pokemon one expensive ribbon if u have enough ribbons to get in this big place
In Pokemon pearl, Pokemon 149 is Dialga. After you've beaten the Elite four, fly to Celestic town, and got to the big house at the north end of the town. Look in the book on the table, and you should see Dialga in there!
In the Department of the Veilstone Building. This little building is next to the big building.
You can find a picture of Dialga in Pokemon Pearl by going up to Cynthia's grandmother's house and talking to her grandmother. If that doesn't work, look in the book that's on their big table.