No official Nintendo update for Ultra Sun/Ultra Moon is numbered “12.” The official updates are:
It resolved a game-crashing bug tied to the moves Plasma Fists and Ion Deluge . pokemon ultra sun update 12 3ds world cia exclusive
[System UI] "An update is available." ↓ (Launches Game) [In-Game Menu] Displays Version 1.2 (Loop repeats) No official Nintendo update for Ultra Sun/Ultra Moon