The Union room in every pokecentre.
in Pokemon pearl you can only get dialga by trading with a friend that has diamond or you can trade for it at the gts
You Have to trade it from Diamond, Peral or Platmiun or U just Cheat
Sunnyshore City
you can't.unless it kept going blue but you can still play it just let's you play after a while of not playing you can trade your Pokemon to your other games[dimond =peral/platinum peral=dimond/planum platinum=dimond/peral]I've did it before so it's possible
no only once what i did is traded some one for it or you can trade it to some one and start over that's wat i did bye
You get the mystery gift from Pokemon ranger games.
No, you cannot. Pokemon Diamond and Pearl are in Sinnoh only.
you must do a certain code
Pokemon Pearl Version ID For Action Replay APAE 31d0afde
where there are Pokemon close to the level as your Pokemon
it is worth about 3459 Pokemon dollors
it is commonly found in route 215,and 210.