sequel

The difference between 'gray' and 'grey' is pretty subjective, though I personally prefer 'grey.'

Set two years after Pokémon Black and White, Black and White 2 features a Pokédex with about three hundred Pocket Monsters. The game begins in a new location called Hougi City. It's still located in Unova. The game will follow two new trainers, with a new rival and new gyms.

Pokémon Black and White 2 is slated for a June release in Japan. It will be out this fall in the West.

Pokéstar Studios!

While the games are out in Japan this weekend, they'll be out in America sometime this Fall.

Pokémon Black and White 2 are the first Pokémon games to be direct sequels instead of a third "expansion" game. Pokémon Black 2 and Pokémon White 2 are slated for release in June on the Nintendo DS in Japan.

Update: Pokémon Black and White 2 will be hitting North America and Europe this fall.

Source: Joystiq