No you can't. You can only migrate Pokemon from earlier generations to later ones, and not the other way around. Sorry.
You can't get them in Pokemon diamond, you must trade from Pokemon emerald.
You have to migrate the Pokemon from emerald.
No you Can't
no
It depends. Diamond has better graphics, but Emerald has a better plot line and in my opinion is better.
You cannot get Rhyperior in Pokemon emerald as he is only in Pokemon diamond and pearl.
You can get Poochyena into your Pokemon Diamond by migrating it from a Sapphire, Ruby, or Emerald Pokemon game.
you have to trade it from a different game, trying ctahing it on Pokemon emerald and migrate it to Pokemon diamond
No, you have to migrate it from Pokemon Emerald, Ruby or Sapphire. No, you have to migrate it from Pokemon Emerald, Ruby or Sapphire.
You cannot find an infernape in Pokemon emerald for that Pokemon you need Pokemon platinum, pearl or diamond.
I am sorry it's impossible to get Regigigas in Pokemon Emerald. You can only get it in Pokemon Diamond, Pearl or Platinum.
you cant get it in emerald, its only in diamond, pearl, and platinum