The official Pokémon website has revealed that the Pokémon Global Link service will be closing for Black, White, Black 2 and White 2 on January 14th, 2014. Details are listed below about when these services will go offline.

Press Release

Announcing the closure of the Pokémon Global Link Service for Pokémon Black Version, Pokémon White Version, Pokémon Black Version 2, and Pokémon White Version 2.

The Pokémon Global Link service for Pokémon Black Version, Pokémon White Version, Pokémon Black Version 2, and Pokémon White Version 2 will be closing completely on Tuesday, January 14, 2014.

After the service is closed, all connection functionality with these video games will become unavailable. Please see the schedule below for more details.

The new Pokémon Global Link, which will link to the upcoming Pokémon X and Pokémon Y games, is expected to launch in October.

Players who have enjoyed the current Pokémon Global Link over the past few years will be able to carry over certain achievements and records to the new Pokémon Global Link for Pokémon X and Pokémon Y, if they register for the new Pokémon Global Link using their existing user name.

In the near future, we will provide more details about this new Pokémon X and Pokémon Y version of the Pokémon Global Link, as well as our plans for the players who have enjoyed the current Pokémon Global Link until now.

The Pokémon Global Link first opened in Japan in September of 2010. We are very appreciative of everyone who has used the service over the last three years, and apologize for any inconvenience that may be caused by its closure.

Pokémon Global Link - Closure Chart

Below is a chart listing the Pokémon Global Link services for Pokémon Black Version, Pokémon White Version, Pokémon Black Version 2, and Pokémon White Version 2 and when they will stop.


Source: http://en.pokemon-gl.com/about/e_notice/