Some Pokémon X and Y players are experiencing a new bug and not one they can catch with a mega ball. This bug has been reported to happen when you save your game in a certain part of the Kalos Region which causes the game to freeze.
Saving in Pokémon X/Y has now turned into a game of Russian Roulette. Some players have reported that saving in a certain part of the games word, the Kalos Region; more specifically – outside streets area of Lumiose City – has caused their games to freeze indefinitely. A reboot of the 3DS doesn’t help the problem because when the save is opened, the game immediately freezes again.
Nintendo are yet to comment on the glitch but until then I’d avoid saving within Lumiose City until Nintendo issue a patch or a fix for said bug – does anyone have a repel I could use?