You have to steal a hacking device from the government but it is illegal
Or travel to an underwater alien base in the bermuted triangle destroy it and become a samurai. then you will have unlocked the ability
To get Dialga in your Pokedex, you must go back to the elder in Celestic town, and then she'll show you Dialga. You cannot capture Dialga in Pokemon Pearl, but you can get Dialga through wireless trade from a friend, or you can trade through the GTS (Global Trade Station), which uses your Wi-Fi connection to trade through the internet to get your Dialga, and virtually any other Pokemon you want.
You can't. You'll have to trade with someone on the internet or a friend. Cranidos and its Skull fossil cannot be found in Pokemon Pearl.
no you cant but you can get them through trade.
No (unless you trade through platinum first)
Trade from pearl or if you have internet support go to the GTS (Global Trading System) building and look out for one there.
No. Just like in Pokemon Pearl with the Pal Park you can only trade from Pokemon pearl to black, not back
Sorry, but you can't. You can trade from LeafGreen to Pearl, but not back.
No, but you can trade them, but not migrate through Pal Park. SS and Pearl are compatible with each other.
Trade with Pokemon Pearl or Pokemon Platinum
HelloSorry to say but you cant trade Pokemon from pearl to leafgreen but you can migrate Pokemon from leafgreen to pearl via the pal park
you cant trade in mystery dungeon but you can trade in pearl with diamond/platinum
you carn't! you can only get it through starter pokemon. trade it OR breed a empoleon or prinplup