The Pokémon Company held a "Pokémon Popularity Contest", polling players on which Pocket Monster they want to meet in Pokémon: Black and White. The winner is not Pikachu. That Pocket Monster wasn't even second!
Number five is Mew, and number four is the iconic yellow monster, Pikachu. Number three is Deoxys, while number two is Darkrai. The most popular Pokémon according to the players The Pokémon Company polled is Arceus.
Since Arceus was voted the most popular, the character will be given away in Pokémon: Black and White. As mentioned above, the polling was held to determine which Pocket Monster would appear in B&W. Besides being rare, Arceus was the star of a recent Pokémon film.
Famed actor, author and singer Akihiro Miwa voiced Arceus in the film. Miwa was very close with Japanese writer Yukio Mishima.