To apply the v1.2 update in Citra, you must "Install CIA" from the File menu and select the update file. Verification:
This guide explores what the 1.2 update brings to the table and how to correctly apply it to your "3DS world" environment, whether you're using physical hardware or portable digital formats. What’s New in Pokémon Ultra Sun Update 1.2?
. For those using CFW who cannot access the eShop, repositories like
Can’t link directly, but search “Pokemon Ultra Sun v1.2 CIA 3DS” on that archive site – look for the file with (World) in the name and a .cia extension. Verify SHA-256 if possible.