The Pokemon that appear and the frequency of them appearing.
No but you can migrate emerald Pokemon to heartgold
Pokemon Heart gold is different from Pokemon Gold cuz heart gold has better graphics new Pokemon and new events
yes.
The new Pokémon games will be called HeartGold and SoulSilver.
Pokemon Heartgold and Soulsilver are the remakes of the old Pokemon Gold, Silver, and Crystal series. Pokemon Heartgold and Soulsilver are for the Nintendo DS.
you can trade pokemon from heartgold to black but you can only transfer the pokemon in heartgold not trade it from black
You can't migrate from HeartGold to Ruby. But it can be the opposite. Pokemon can be migrated from Pokemon Ruby to Pokemon HeartGold.
No there is only heartgold and regular gold
In the new Pokemon HeartGold game, you can catch new Pokemon such as Beldum, Latios/Latias and you can choose between Treeko, Mudkip, or Torchic. (Can all be obtained through Pokemon League Champion Steven from the Hoenn Region.)
The main differences are the graphics,and Red.Red resembles Ash,in both Heartgold for GB and DS,but in DS he looks more evil.Red has a Pikachu Level 88,so you better watch out.If you were trying to decide which one is easier,its GB Version.In DS the National Pokedex has Sinnoh Pokemon too.
They are not in Pokemon Gold and Silver. However, they are catchable in the remakes of Gold and Silver, HeartGold and SoulSilver.
there are no new Pokemon on heart gold there is still only 493