You cannot go underground as you were able to in Pokemon Diamond and Pearl. You are stuck above ground in Pokemon SoulSilver. You get two regions to go between, though.
No. The underground is only in Pearl, Diamond and Platinum.
You can't mine underground in either Pokemon Heartgold or Soulsilver, but you can mine underground in Pokemon Diamond, Pearl, Platinum.
In both heart gold and soul silver, you are unable to go to the underground, you can however go there in Pokemon diamond, pearl, and platinum.
The card key in Pokemon Heartgold and Soulsilver is located in the Goldenrod Underground.
Underground in Goldenrod City.
No, you cannot go to Hoenn in Pokemon SoulSilver, but you can still get the Hoenn legendaries. Pokemon SoulSilver is a copy of Pokemon Silver, and you can only go to Johto and Kanto.
The Underground is unavailable in HeartGold and SoulSilver versions
go to goldenrod city and go to the underground tunnel a look around and there is a team rocket grunt there he will give it to you
you can't get underground in soul silver. if you're looking for stones trade Pokemon from diamond, pearl, or platinum holding them.
It is in the underground tunnel
its in goldenrod at next to the poke center (3rd gym)
There isn't one.what you need to do is go to the photo booth in the goldenrod underground and take one of the rocket outfits.