Today Nintendo have released an update to Pokemon X & Pokemon Y.
The patch will fix the widely publicized save glitch (Details of the glitch can be found here).
The patch will also fix a minor problem with the GTS which would bring up errors when using certain functions.
You can get the patch 1 of 2 ways:
1) Start the Nintendo eShop on a Nintendo 2DS/3DS system that is displaying Pokémon X or Pokémon Y on the HOME Menu. This will show a list of software with update data available, from which you can select and download the update data.
2) Scan one of the QR Code patterns below using a Nintendo 2DS/3DS system while connected to the internet.
Pokemon X:
Pokemon Y:
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