Refined various minor gameplay elements to ensure a "smoother gaming experience". Why the Update is Required
During a brief period, Nintendo allowed nicknames to appear in online battles; this patch reverted the display back to the Pokémon's species name to prevent the appearance of inappropriate names. Pokemon X Update 1.5 Cia
While the official way to update is through the Nintendo 3DS eShop (where updates often remain available even after the storefront closes for purchases), many players utilize CIA files. Refined various minor gameplay elements to ensure a