ditto
No, there are no other regions in Pokemon Diamond.
there isn't a Pokemon ranch on Pokemon diamond, its a complete other game! there isn't a Pokemon ranch on Pokemon diamond, its a complete other game!
you can't get the pokemon off of pokemon black on diamond, but you can do it the other way around.
You have to battle other Pokemon with it.
you cant
Celebii is not catchable in Pokemon diamond. You have to transfer it in to Diamond from other versions that have Celebii in it.
to transport Pokemon from other Pokemon games to your Pokemon diamond you need to have six Pokemon in your PC on the other Pokemon catridge
In diamond is TENTACOOL but I am not sure about in other Pokemon games. In diamond is TENTACOOL but I am not sure about in other Pokemon games.
You can get other fossils when you defeat the Elite Four and the Champion and receive the National Pokedex in Pokemon Diamond.
Pokemon diamond
In Pokemon Diamond (and Pearl), Cynthia's first Pokemon is a Spiritomb. Her other 5 Pokemon are Garchomp, Gastrodon, Roserade, Milotic, and Lucario.
you have to migrate it from emerald to diamond with i think 6 other Pokemon then catch it in the pal park