Celebrating 20 Years of Pokemon!

Just got my Celebi on Omega Ruby. With that I've finished the Johto part of the Dex.
Also, I couldn't get Mew because there are no GameStops here in Latinamerica... Sorry to bother, but can anyone here trade me thier Mew for half a minute just to register it on the Dex? Please? I'll return it immediately. ._.;
A mystery Pokemon will be distributed to players who completed at least 3 battles in the Johto Classic Global Link tournament. Registration is from Thursday, May 19, 2016, at 00:00 UTC, through Thursday, May 26, 2016, at 23:59 UTC, and the tournament will be held Friday, May 27, 2016, at 00:00 UTC, through Sunday, May 29, 2016, at 23:59 UTC.