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You cannot get the GS Ball.
The GS ball has celebi in it but you can get it through a event or get it by entering an action relay code
None of them make GS balls. The GS ball was an event item in the original games.
There is no Apricorn that will make a GS Ball. The only way to get a GS Ball was through an event using a Japanese copy of Pokemon Crystal.
you need a gs ball