Pokemon Global Link going offline for Black/White, Black/White 2 in January 2014
Pokemon Global Link features for the Pokemon Black/White and Black/White 2 games will be going dark on January 14, 2014. A few items, such as the end of Dream World registrations, will end this October – October 12, specifically. Some features including the ability to use GTS and Free Mode in Random Matchups in the game will be kept in tact, however.
Pokemon X/Y will usher in a new Global Link. This is set for release in October – the same time the new 3DS games launch. Players who register with their existing usernames will be able to bring over some achievements and statistics to the new Global Link.
You can find more details about the Global Link shutdown here.