Hi basically you need heartgold or at least trade from heartgold to soulsilver to get all of them and technically complete the pokedex however tearetically you only completed the pokedex as far as the game goes but you dont actually have them all because celebi is from the jhoto kanto region and you can only get him through a Nintendo event,trade or pokemon xd bonus disc for gamecube and even more like mew, but if you want to complete the pokedex technically then i m sorry!but you need accses to both of the pokemon games hence the reason they released 2 with respect!You should be able to see more then 80% if not 90% of the pokemon in the game if you only have 1 of the 2.Hope this helped!
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