Pokémon X and Pokémon Y are to receive extended online maintenance this evening with online activity affected.
Nintendo have confirmed that the services, which include online battles, rankings, trades etc - will be unavailable between 4pm and 6pm PST (12am - 2am GMT). Reason for the downtime wasn't specified, but may well be linked to the postponed release of Pokémon Bank and Transporter.
Have you accessed Pokémon online recently?