you do need cheats
No, the only way is to attend a Nintendo event.
The only way to get Celebi on Pokemon Pearl without AR cheats is via event distributions. However these events are no longer being held or supported for Pokemon Diamond, Pearl and Platinum.
You need the event to find celebi without cheating.
There is no such thing as a real Celebi Fossil. However with cheats and sketchy modding it may be possible.
No, the only way is to attend a Nintendo event.
You cannot obtain Celebi in HeartGold without cheats if you missed the event.
you really can't catch celebi in a Pokemon game without cheats
yes
You can't without cheats.
tradefrompearl
you haft to get past the pokemon leage first then you haft to get a pass from mystery gift and a pokemon boat appears.you get on it and there is a island.you haft to have a all the moves to get there.youcan then battle celibi
you can trade it