Adding on to Caleb's point, @Lord Celebi I fully agree with the big fat god mode thing. I also have more personal reasons for bringing this up...

By all accounts Lenore could find, the Legends fled once Johto came under attack;
Yes, I recognize that it's one little sentence in one SU, easily overlooked. However, Caleb and I had agreed early on that the Johto Legends had fled at the start of the war. Every single one of them, by all evidence, is extremely shy; they wouldn't stick around in a region where their people were turning vicious and they were likely to see their homes get bombed out. We had planned on using their exodus as a plot-driving mechanic later on. The fact that you're effectively claiming Celebi for yourself - on top of all of your other firepower - with no discernible basis other than your outside fanfics is unsettling, too, as it seems to me that canon outside the RP should not mingle with the RP canon itself, Celebi time BS or no. Not to mention that I personally think Celebi probably shouldn't be claimed at all (without concrete limitations set beforehand, anyway) because the time issue does make it a walking godmod, but if it is, that should be something for us Johto people to do (provided we do the work we have to do to earn it, as we would for any other Legend). Hoenn has plenty of powerful Legends on its own, y'feel me?

TL;DR, this Celebi thing is unsettling and feels like an infringement and contradiction on Team Awesome's Johto canon based only upon canon that doesn't relate to the RP.