Pokémon Update Data v1.2

New update data (Version 1.2) for Pokémon X and Pokémon Y has been released in Nintendo eShop and replaces Version 1.1. This new version contains the fixes in both versions. All customers who own Pokémon X or Pokémon Y should download this update data, even if they have already downloaded Version 1.1.

Ver. 1.2 (13.12.2013)

• Fixes the issue where moves which Pokémon learn while evolving with Wonder Trade are not appearing.
• Fixes the issue where some users can't view the promotion video tagline in the Lumiose City event.
• Minor changes to the Internet connection method.

Important notes: It is necessary to download this update to access Pokémon X and Pokémon Y features which require the Internet after 13th December 2013.

Source: http://www.nintendo.co.uk/