This is a crucial issue to be aware of: Pokémon Eternal X does not support title updates . As a result, it is susceptible to the infamous Lumiose City save glitch. This glitch can corrupt your save file if you save the game while standing in certain areas of Lumiose City. To avoid losing all your progress, you must never save your game while inside the city. Make it a habit to save only on routes, in other towns, or inside Pokémon Centers, and exit Lumiose City before saving.