I dont think there is but there is dusk ball in the safari zone.
The girl with butterfree is selling.
No Apricorn will let you get the GS Ball in Pokémon SoulSilver.
go
there is no gs ball introduced in soulsilver, only gold silver crystal japanese versions.
There isn't Ball Capsules in HG/SS.
Dark Cave
use it
event
There is no GS ball in soulsilver or heartgold
There are no legendary in dark cave in soulsilver that i know of, but i know alot of legendaries and I could list some of them if you want.
In Pokémon HeartGold and SoulSilver, there is no Apricorn that will create a GS Ball because the GS Ball doesn't exist in those games.
in dark cave
Simple, YOU CAN'T