Update 1.2 for Pokémon Sun on the 3DS is a significant patch released to address critical bugs and is required for all online features like trading and battling.
Patched a well-known glitch that allowed players to complete all Poké Pelago activities instantly by manipulating the console's calendar during a month change.
Fixed an issue where Pokémon would become unable to attack or switch if they were knocked out by Spiky Shield damage while using Sky Drop . Pokemon Sun: Update 1.2 3DS (WORLD) CIA
Corrected an issue where items could sometimes be given to Pokémon Eggs. Installation for Modded Systems (CIA)
Fixed a bug that sometimes prevented Scatterbug from properly learning Egg Moves. Update 1
This update primarily targeted several glitches that could disrupt gameplay or be used for exploits:
If you are using a modified 3DS with Custom Firmware (CFW) , there are specific considerations for installing the update via CIA: Corrected an issue where items could sometimes be
Resolved a rare case where the game would crash if an evolution item was the last item in the bag and was used.