Pokémon popularity poll to begin on Saturday
The official Japanese website has announced a popularity poll to begin on September 18th, which will determine a Pokémon to appear for a limited time in the Pokémon Dream World.
The Global Link website, for use with the Pokémon Black and White games, will open on the day of the games' release. From then until 5 PM JST on November 1st votes may be placed for a Pokémon to appear in the Dream World.
The results are scheduled to be tallied and announced at 5 PM JST on November 5th, at which point the most popular Pokémon will become available in the Dream World. The winning Pokémon will be found in the Dream World until 5 PM JST on January 31st, 2011.
http://www.pokemon-sp.jp/news-sp/2010/09/0913_01.html - Official Pokémon website (Japanese)