Start/End Dates	2012-08-12 through 2012-08-12
Country	United States

Details

Players of the English, Japanese, German, French, Spanish and Italian version of Pokémon Black Version or Pokémon White could receive the special Flying Pikachu at the last day of the World Championships 2012 in Waikoloa, Hawaii.

Distribution Times - August 12th, 2012 - Day 3 of Championships

11:00AM until 12:30PM: English, Italian and French games. 2:00PM until 3:30PM: to Japanese, German and Spanish games.

Press Release Excerpts

Today Pokémon video game players can receive Flying Pikachu to their Pokémon Black Version or Pokémon White Version games. This is a Pokémon that can’t be obtained during normal gameplay, and you can use it to Fly around in your game!

Source: http://www.pokemonworldchampionships.com