Just keep rock smashing in the ruins of alph. You can only get the dome fossil since your playing soulsilver, but if you find an extra one, trade it to a friend for a helix fossil. Everybody wins!
You should try the ruins. But be patient. Several things appear when using rock smash such as shards, geodudes and of course fossils.
You can find them in the ruins of alph. If you keep on smashin rocks in the top corner of the ruins near the top exit you can find them. Just keep lookin and don't give up!
You're all wrong, helix fossil and dome fossil are each version exclusives, dome is on soul silver, while helix is on heart gold.
Heartgold only. You get a different one soul silver
The dome fossil is better!
I got the old amber and dome fossil in soul silver I don't have heart gold but you can get the helix fossil in heart gold
You can't get one the end
If you to the ruins of Alph keep smashing rocks like I did I was looking for a old Amber and I found one!