Simple two words ''You Can't!'' it would be cool though if we can :)
Pokemon black by far. but if you have a choice between Pokemon black or Pokemon white get white. you can get more Pokemon in white than black , plus there is white forest and you can get rare Pokemon there i think
No, it is only in Pokemon Black/White/Black 2/White 2.
you can't, you can only transfer to black and white
No. If you wanted to, you could trade from HeartGold to Black and White, but not the other way around.
Reshiram is a Pokemon that is exclusive to the Black and White games; since Black and White were made after HeartGold and SoulSilver were released, it is impossible to get a legitimate Reshiram on your game.
heartgold and soulsilver
Pansear isn't in HeartGold, it's in Black/White, in the Unova region.
As far as I know, Pokemon on Pokemon Black and White have to stay on those games, as for Pokemon HeartGold and SoulSilver, you can not only migrate Pokemon from earlier generations of games, you can also trade with Pokemon Platinum and Diamond and Pearl. Still, the Pokemon on Pokemon Black and White look cooler! :)
you can't only in Pokemon black and white.
After beating the story and obtaining the National Pokedex. Go to Route 15 in Pokemon Black to the Pokemon Shifter Building. Connect a second DS running Heartgold. There you will be able to transfer up to 6 Pokemon from Heartgold to Black/White. Make sure the Pokemon transfering have no items and do not know HM moves(Cut, Surf, Flash, ect) You can not trade or transfer from Black/White back to Heartgold.
You cannot. Once in Black/White it cannot be sent back
If you have Celebi on Pokemon Diamond, Pearl, Platinum, HeartGold, or SoulSilver, you can use the PokeTransfer machine in Pokemon Black and White to transfer it.