Returning ahead of this year's Nintendo DS sequels, the site contains a new Global Trade Station, allowing players to view Pokemon trades taking place throughout the world.
New areas have been introduced to the Pokemon Dream World, such as the Icy Cave and Unova region, the latter of which will be available exclusively to players who purchase either Pokemon Black 2 or White 2.
Players will have more control over which part of the Dream World they visit, based on the type of Pokemon they tuck in to bed.
New statistics will also be available to players, including individual and regional records, such as countries with the best healers or the most prolific trainers.
Pokemon Black 2 and White 2 are the first direct sequels in the series. Nintendo traditionally denotes new additions to the franchise by colour, rather than numerically.
The games are set two years after their predecessors and see players return to the region of Unova.
The world has undergone numerous changes since the previous games, and will play host to new characters.
Nintendo officially unveiled the games in February, following a lengthy teaser campaign.
Pokemon Black and White 2 will be released for Nintendo DS in the West this autumn.
Watch a trailer for Pokemon Black and White 2 below: