No, Pokemon can be migrated from Soul Silver at any point, just as long as there are at least six Pokemon in the storage boxes.
Whenever you defeat the Elite four and "beat" the game, you go to the Poke Transfer Lab, and transfer over 6 Pokemon at a time over to your game. But, if you want to do that, you MUST have 2 DS systems.
Yes. After you beat the main story, you can migrate from daimond, pearl, platinum, heartgold, and soulsilver versions to black and white
You can only trade Pokemon from Soulsilver to Black. You can only trade back if it is one of the 4 previous generations.
You can't beat cave.
you have to beat the Pokemon league then go to the Pokemon transfer lab at route 15 you need to go onto ds download play to transfer Pokemon from silver to white but you cannot transfer Pokemon to soul silver
you have to beat black or white then you can go to a poke transfer lab on on route but Pokemon u transfer cant no a hm and it cant hold an item
beat the 8th gym
you cant but you can transfer platinum Pokemon to black or white only if you beat the elite 4
You have to beat the elite four. Then beat Ghetsis and N.
You have to wait until you beat Pokemon Black/White and obtain the National Dex before you are able to transfer Pokemon from Diamond and Pearl.
use the transfer machine on diamond, pearl, platinum, heartgold, soulsilver which ever version you have it in, the transfer machine is treated like the plapark except transfering the Pokemon is required with 2 ds's they did this to avoid generation 4 Pokemon which don't exist in generation 4 Pokemon games from being traded.
He vanishes.