The event was held from February 21 2011 to March 7 2011.
Celebi
Yep
You can only find celebi in the special event.
You need to have the Celebi event. it is over. sorry
you can't! you have to get the special event celebi or use AR
you get it by an event.
You have to get it through an event.
Get the celebi event.
You do not get Celebi anywhere in HeartGold. The only ways you can get a Celebi is by downloading an available Nintendo event where it is offered however there wouldn't be anymore events for HeartGold or you can trade with someone else who was able to get a Celebi at an event.
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I'm afraid you cannot get a Celebi in Pokemon HeartGold, unless you use a Action Replay. The only Celebi legal, I think, is the Nintendo Event that has passed. If you do have the Celebi in your GameBoy Pokemon Cartridge, then you can migrate it to Pal Park, then trade from Pearl/Diamond to HeartGold/SoulSilver.
no that is a separate event