they are not any better than diamond, pearl and platinum
in japan version einstine
Yes you can
No
you can't.
Why Soul Silver is about the original Pokemon Silver game for game boy. Soul Silver has some more bonuses.
You can only find Ledyba in Pokemon Silver and Soul Silver version.
You can't get it in the silver version only heart gold
No
my opinion is it only works in the original gold version,not heart gold and soul silver it works on silver but not soul silver.
If you mean coins, you can only win them in the English soul silver but you can buy them in the Japanese version of soul silver.
black and white
By trading it from Diamond, Pearl or Platinum version.