you can't you can't.
Gameshark.
You can't obtain Celebi without an event or a gameshark. Don't listen to the people who tell you that you can get it without cheats.
go to the next Nintendo event.
trade
you have to go to an event like toysrus (USA only) or get an action replay for gameboy
by a Pokemon event kepp looking on Pokemon.com and there probbly say when! But other then a gameshark or action replay you can't
Unfortunately, you cannot catch Deoxys without the Nintendo Event. This event has been over for a while.
Without Cheats You Cant! If you are going to cheat, use Gameshark.
i think it might be imposible withoutaction replay or gameshark
needan action replay only other way
You just cant
you have to have gameshark or go to a special event you have to have gameshark or go to a special event