first you have to beat the game and get both the safire and the ruby witch can be found on mt emeber and in dot cave heres a quick tip you must use cut a dotted cave
Pokemon Emerald: Birth Island Pokemon Sapphire: Trade from Pokemon FireRed, LeafGreen, or Emerald. Pokemon Ruby: Trade from Pokemon FireRed, LeafGreen, or Emerald.
yes you can trade pokemon leafgreen pokemon to pokemon emerald version same as pokemon fire.
You can trade between firered, another leafgreen, ruby, sapphire and emerald also Pokemon colosseum and Pokemon xd gale of darkness.
TRADE FROM EMERALD
Trade with Emerald.
You trade from Pokemon FireRed/LeafGreen
Simply trade between ruby, sapphire and emerald, remember to trade with emerald you need wireless adapters.
it's not in emerald,you have to trade from leafgreen or firered
Trade a charmander from firered or leafgreen to emerald.
Aipom is not available in leafgreen have Emerald or Pokemon Colosseum trade you one.
trade from emerald
Trade from FireRed/LeafGreen