Make sure SoulSilver has Platinum's Friend Code, and Platinum has SoulSilver's Friend Code.
yes.but you need a kyogre from heart gold and a groudon from soul silver and it wont work if you trade them over from platinum or if you use AR(action replay)
Yes you can but some features from heartgold and soulsilver wont be available. Such as the different forms of rotom giratina and shaymin but most likely you wont have access to that because that's in Pokemon platinum
It wont let you because the new Pokemon cant go onto the older game you can only transfer Pokemon from older games on to black/white
In Ecruteak city. Trust me, YOU WONT MISS IT
trade a haunter to one of your friends, then make them give it back, or get a haunter from someone else. NOTE: it wont evolve if its holding an everstone.
that wont work
You don't, so sorry and you wont get on in there but if you do...
It just might be that it doesn't work. Or try, if you have, another Pokemon game pearl diamond or platinum then trade your Pokemon there. now restart your game, then trade them back
I think that means you hacked that Pokemon and it cant be traded.
you must trade it to platinum pearl or diamond and level it up by the moss rock. as long as you trade it back to the original trainer afterwords, it wont act like a traded pokemon, so make sure your eevee is from your heartgold game.
technically no, but you wont get anywhere in the game.
Eevee ----ANSWER 2: it wont work, for Leafeon, u need to have a person with diamond, trade an eevee over there, have them go to the forest after "flower town" and have eevee go up a level, it should evolve into Leafeon after that