From Bulbapedia, the community-driven Pokémon encyclopedia.
This is a reverse-chronological list of game-based Pokémon distributions that were given away using a game-based method for all language Pokémon games in Generation VI.
List of game-based Pokémon
Pokémon Bank Celebi
This Celebi was available to players who accessed Pokémon Bank from December 25, 2013 to September 30, 2014. This Celebi has three IVs of 31 for three random stats and knows Hold Back, an event-exclusive move similar to False Swipe. It was downloadable over the Pokémon Link option in Pokémon X and Y.