trade with someone
That appears to be true.
Professor Elm will give you 1 Johto Starter
Steven will give you 1 Hoenn Starter, and
Professor Oak will give you 1 Kanto Starter
I have not heard anything about a Sinnoh Starter.
You have to have arceus to get to sinnoh but only once
you cant
You can't go to the sinnoh region.
As far as I know, the Sinnoh region is not included in Soul Silver.
No
No, only jhoto and kanto
There is no sinnoh region in heartgold or soulsilver, it is only Johto and Kanto.
you can't you have to trade
You can't.
In the Sinjoh ruins of alph?
The Sinnoh Sound radio station will be playing on Thursdays.
you cant get to the sinnoh region in Pokemon hart gold or soul silver but you can get the starter Pokemon at slip co (i think its called) once you done all gyms and defeated red (the Pokemon with emerald version).