You can't the only way is to use GameShark and use the cheat and then you will be able to get a gs ball
You don't get the gs ball in Pokemon soul silver to get celebi, celebi can only be obtained through the Nintendo Event.
The Pokémon that was inside the GS Ball was supposed to be a Celebi however the Producers scrapped this plot due to focusing the 4th Pokémon Movie on Celebi.
you cant get celebi unless you got the GS ball from a special event
get 360 Pokemon on the pokedex professor Elm will give you a gold and silver ball go to the shrine and you will put the GS ball in the shrine Celebi will atack you that's when you catch him.
The GS ball has celebi in it but you can get it through a event or get it by entering an action relay code
if it is like the Celebi event during Pokemon Gold/Silver, then another Celebi event should be coming up. You get the GS ball from Kurt, then when you get it back, go to Ilex Forest, place the GS ball in the slot, and Celebi will appear. This might not be right since this is the Gold/Silver event.
The GS ball was a ball that was supposed to have a celebi in it. The GS ball was supposed to be made with the feathers of lugia and ho-oh. However, the makers of Pokemon decided to put celebi in a movie rather than in the anime. So the ball was left, hoping that people will eventually forget about it. The GS inscriptios stand for Gold and Silver which are the vercions in which the jotho saga takes place. Also on a side note the ball was allegedly to reappear in the next saga of the Pokemon series, but the controversial episode involved homosexual overtones that left the episode unfinished and forgotten.
I'm not sure, but the unusual apricorn in Pokemon soul silver is the "silver apricorn". If you want celebi, get the silver apricorn, give it to Kurt, (poke ball maker) and in a day (or you can set your ds or dsi another day forward) and you have the Gs ball. Go to the ilex forest and put it in that little house and celebi will pop out.
The GS ball hasn't been programmed in Pokemon diamond/pearl If you were wanting to get Celebi you'd be better off migrating from the 3rd gen. There might be a future event where you could get celebi on diamond/pearl. The only game which the GS ball has appeared is Pokemon gold/silver/crystal
Celebi is an event pokemon, in Gold and Silver (including their remakes) You need the GS ball for the original Gold and Silver to find it. In the Heart Gold and Soul Silver, you need a Pikachu coloured Pichu (not shiny)
That was a Dark Ball.
You have to catch every single Pokemon except Celebi (of course) then you get the GS Ball from Kurt in Azelea Town. To catch every single Pokemon, you HAVE to trade from other Pokemon games, it's pretty difficult to get all of them.