I would think so, but that's kinda sad. Fun thing about Odd egg is Shininess + DynamicPunch Dizzy Punch combo xD
Sadly, I don't think Poketransporter blocks invalid met locations in Gen 2 data. (I'll give it a test soon).
Because it has an event location in the Gen 2 data, it'll be illegal.
However, the data gets wiped upon transfer, so it'll become legal.
Given that the definition of legal entails hacking something to appear as tho it was obtained legitimately,
as much as it bugs me, the transferred copies should qualify as legal, since it'll be indistinguishable from regular Crystal Celebi.
(furthermore, it can have origin games as Gold or Silver, since it could be traded then transported,
and transporter sets the origin game as game that it was transported from, for VC games)
(Then again, you could always start your game with the OT PCNYa/b/c/d just to mess with people...)
edit 1:
Yup, the Celebi didn't transfer at level 5.
Leveling them to 30 allowed transfer -.-