When you have 7 gym badges to have to go to a guy where the 7 gym is and buy a ragecandybar and then you have to pass him and go to a cave called the ice path
Clair is at black thorn city but first you need to get through ice path and route 44
when you arrive at cinnabar island, you surf to the right and you will see a cave go inside and go up the ladder
no you can trade soulsilver pokemon to black
he is not in Pokemon soulsilver or Pokemon heartgold
POKEMON SOULSILVER come with a poke walker and the Soulsilver game
Pokemon soulsilver and Pokemon heartgold are basically the same game just different versions but i do recommend buying Pokemon soulsilver
SOulsilver
You CANNOT LEGALLY download Pokemon Soulsilver.
You can't catch bastiodon in Pokemon soulsilver.
You'll need to trade for it from Pokemon HeartGold. It is not avilable in the wild in Pokemon SoulSilver.
there is a mew in Pokemon soulsilver but you need to catch all leadndery Pokemon including event Pokemon
You cannot battle between a Pokemon Black game and a Pokemon Soulsilver game.