No Apricorn will let you get the GS Ball in Pokémon SoulSilver.
event
there is no gs ball introduced in soulsilver, only gold silver crystal japanese versions.
Simple, YOU CAN'T
There are NO apricawnz that make a GS ball. It was Event only.
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.
You don't get the gs ball in Pokemon soul silver to get celebi, celebi can only be obtained through the Nintendo Event.
you cant catch celebi by putting a gs ball in ilex forst shrine the gs ball does not exist you get celibi in a wi-fi event
only by the event of celebi that is going to be send by wifi connection
There is no GS ball in soulsilver or heartgold
You can get the event for the GS ball in Soul Silver or you can cheat/action replay it. There might be other ways too. But you have to look in YouTube for that.
You cannot get the GS Ball in any Pokemon game besides the Crystal version. Even though Pokemon Crystal has coding for the GS Ball to trigger an event to catch Celebi it is not obtainable. The GS Ball was an event item distributed only in Japan meaning it's not possible to get the GS Ball. It is however possible to cheat the GS Ball into your character's bag using a cheat device.