Once updated, you can safely explore the extensive post-game content, including the chapter and catching Ultra Beasts like Blacephalon (Ultra Sun exclusive).
Before modifying any game files or applying major updates, always use , the premier 3DS save manager. Open Checkpoint, locate Pokémon Ultra Sun , and press A to create a backup of your save file. If an update file ever corrupts due to an interrupted installation or a faulty SD card, your hundreds of hours of Pokémon training will remain completely safe. Final Thoughts on Preservation
The Battle Agency (Festival Plaza) had a memory leak that would crash the game during multi-battles. v1.2 completely resolves this.
Some users reported crashes when using older or mismatched updates; the v1.2 World CIA is specifically designed to prevent these stability issues. Troubleshooting
Strict. Mixing an EU update with a US base game causes crash loops.
Fixes a rare issue where Pokémon received via Mystery Gift were not being registered in the Pokédex.