Answer 1

1.you use relocator
2.get a action replay
3.get him in a event

3 ways to get celibi :)

Comments

The relocator has nothing to do with obtaining celebi, it just allows a transferred celebi to unlock the zorua in castelia city. also, that event ended long ago, so you have only listed 1 way to get a celebi that actually works.

Answer 2

outside of a past event, you will have to either trade for one, or hack one onto your game.