Nintendo released Update 1.2 to fix critical bugs that disrupted competitive play and online stability. This patch is mandatory if you want to access the game's online features, such as the Festival Plaza, Wonder Trade, and the Global Link. Key Fixes in Update 1.2
Reinsert the SD card into your 3DS and power the console on. Launch the homebrew application from your HOME Menu. Navigate to SD →right arrow cias . Highlight the Pokémon Ultra Moon 1.2 update file. pokemon ultra moon update 12 3ds world cia exclusive