The patch requires 539 blocks of space on your SD card, equating to roughly 67.35 MB .
Are you installing this on a or an emulator like Citra?
How to reduce risk:
Before the eShop closure, you had to match your console region. Now, with physical cartridges being rare, many users own a Japanese Ultra Sun cart but want English text. The -WORLD- CIA updates the game without forcing a system format. Pokemon Ultra Sun- Update 1.2 3DS -WORLD- CIA -...
[Game Engine Processing Move Data] │ ├──► Glitched Moves (Curse, String Shot, etc.) ──► Game Freeze (Ver 1.0/1.1) │ └──► Update 1.2 Implemented ─────────────────────► Memory Safe Execution 1. Competitive Move Freeze Glitch
Unlike .3DS files (which are used primarily for flashcarts like Gateway), .CIA files install directly onto your 3DS SD card.
In earlier versions, using the move Wide Guard could cause the game to incorrectly handle damage calculations or freeze during specific Z-Move interactions. The patch requires 539 blocks of space on
saved on version 1.1 or earlier may no longer be playable or shareable.
If you have installed the 1.2 update via CIA but the 3DS still asks for an update, it may be due to an incorrect internal version number in the CIA file (often seen in "bad dumps"). Crashing on Startup:
Update 1.2 is the final official software patch released by Game Freak and Nintendo for Pokémon Ultra Sun. In the 3DS ecosystem, updates are distributed separately from the base game. This means that even if you possess a base Pokémon Ultra Sun CIA or cartridge, you must install this specific update file to access the definitive version of the game. Key Bug Fixes and Patch Notes Now, with physical cartridges being rare, many users
Having trouble with multiple Pokemon Ultra Sun CIAs : r/3dspiracy
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