[leafgreen386]

protip: clone valuable pokemon before trading

And a level 100 pokemon is much less valuable than a lower level pokemon. With lower level pokes, you can re-EV train them, but at lv100 they're stuck the way they are. Also, on wifi, you can automatically set your pokes at lv100 or lv50, making lv100 pokes almost a detriment, and far less valuable than they used to be in previous gens.

What nature/level/IVs does that celebi have? I might be willing to trade something for it if it's under lv100 and has a good nature.