You should look around the island for a old calender then go to the Vermilion town get a ship to birth island and find mew
You will need a Action Replay(or it might be Gameshark) and you can find codes on Google.
its impossible without gameshark or action replay.
without gameshark or action replay, NO
You can't without action replay,gameshark,etc.
action replay or gameshark, if you havnt been to the Nintendo event
you could download the ROM from romsite.net and get the VBA emulator from any emulator site then go to the game shark codes site and find firered or firered/leafgreen and use the cheats to do that. either than that, its impossible
u hav to transfer it from firered or leafgreen
Nintendo Event (Not happening since this game is pretty old now) Cheat Device (Action Replay or Gameshark)
i think it might be imposible withoutaction replay or gameshark
Celebi is not found at any island at FireRed. Furthermore, it's not catchable anywhere in the game. You'll have to use an Action Replay or Gameshark to get one, since there are no more Nintendo events for FireRed and LeafGreen.
Trade one from Firered or Leafgreen Version. You could also use cheats and hacks,gameshark, or action replay.
simple answer: there´s NONE