Pokémon Ultra Moon Version 1.2 update (released in February 2018) is a mandatory patch for accessing online features and is primarily designed to fix critical game-breaking bugs. PocketMonsters.net Update Overview Release Date: February 2018 Approximately 539 Blocks (~67 MB) Requirement: Mandatory for all online functionality. Key Fixes & Changes

The universally accepted, safe method is using a (like NUSspli on the 3DS itself or Wii U USB Helper for PC) to fetch the update directly from Nintendo’s archived CDN. Since the eShop is dead, these tools still access the raw files via Title IDs.

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The Ultimate Guide to Pokémon Ultra Moon Update v1.2 : Everything You Need to Know