I have noticed that some "special" Pokemon on the GTS in XY can't be traded. The list is: Mew Celebi Jirachi Deoxys Darkrai Shaymin Manaphy Arceus Victini Keldeo Meloetta Genesect They all are event Pokemon and I'm not sure why these can't be traded. Is there an article or something nintendo has put up explaining why it's not possible? PS I think this applys to wondertrade as well
Game Freak wanted it that way.
Unfortunately that's just the answer. They haven't supplied us a real reason - probably because they want people to go use the event, not just get it from the GTS, the lazy thing to do.
Hope I helped. :)
These Pokémon were only released as part of events. As a result, they are banned from GTS and Wonder Trade. muhhh...
It doesn't matter if they have the ribbon or are in cherish balls or not. They are Pokémon that are banned.
This question was asked in a similar manner previously Here
Answered with exp.
Goodluck!
So any of those Pokemon have a Classic Ribbon or a Premier Ribbon? If so, then you will be unable to trade any and all Pokemon possessing such ribbon. All event Pokemon possess either the Classic Ribbon or the Premier Ribbon.
While event Pokemon cannot be put into the GTS, they can in fact be deposited on Wonder Trade and can be Link Traded.
Source: Experience (Traded event Deoxys to passerby in X for another legendary I can't remember); here
Hope this helps!