>>42090711>GSCNot sure if you meant to type that, but Crystal is the only one that has the wild Celebi event.
All you need to do is beat the E4 and champion the first time, then go to Goldenrod's Pokemon center. I believe once you check out the upper floor and come back down, an npc hands you the GS Ball and then you take that to Kurt. Wait a day, then you talk to kurt again and go to the shrine.
Good luck. I'm at 2800+ resets myself for it.