I think that a good site to see all of them would be seribii.net because they have everything including Pokemon heartgold and soul silver.
there is a mew in Pokemon soulsilver but you need to catch all leadndery Pokemon including event Pokemon
Yes all Pokemon can follow you onheartgold and soulsilver. Think of a blastoise following you.ahhhhhhh!!!
almost all of them do.
No!
look in bulbapedia.com.
your main goal is to get all pokemon
yes,ss contains all Pokemon
Not all Pokemon regions are available on all games. SoulSilver only has access to Kanto and Johto.
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