There is no Pokemon named Pochana.
SOulsilver
A Pokemon from a Diamond, Pearl, Platinum, Heartgold, or Soulsilver event.
Yes all Pokemon can follow you onheartgold and soulsilver. Think of a blastoise following you.ahhhhhhh!!!
Kris is only in Pokemon crystal
No.
Athletes Shop in the Pokeatholon Dome on certain days
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
About 10 times then you can fight your rival at certain days at the Pokemon League.
SOulsilver
In the Safari Zone, with the right blocks in place you have to wait around 100 days.
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