Start/End Dates	2013-04-25 through 0000-00-00
Country	United States

Details

If you attended a League Event during the Nimbasa Gym Season, your reward is waiting at the Pokémon Global Link!

A tough and battle-ready Dragonite is waiting for Pokémon League players! If you are registered as having played at a Pokémon League event during the Nimbasa Gym Season, you automatically qualify for this Dragonite. All you have to do to get this Pokémon is go to the Promotions page at the Pokémon Global Link and follow the instructions. The next time you use Game Sync, Dragonite will be added to your game!

Source: http://www.pokemon.com/us/pokemon-news/op_pgl_claim_dragonite-2013-04-25/