For players using specific custom versions like "Supernova Sun" or "Penumbra Moon" (which may be what you are referring to with "exclusive" world versions), the update is often integrated to ensure the base game engine supports high-difficulty trainer rosters and modified pickup tables without crashing during specific move executions.
Nintendo and The Pokémon Company ended official 3DS online support and updates for these games years ago. The last official update was (released shortly after the games launched in November 2017), which fixed bugs and added some online compatibility. pokemon ultra sun update 12 3ds world cia exclusive
On the 3DS, a .cia file is the installable format for games and updates used by custom firmware (CFW) like Luma3DS. Unlike a .3ds (cartridge dump) or .cci , a CIA installs directly to your SD card’s Nintendo 3DS folder, appearing on your home screen like a legitimate eShop title. For updates, CIA is the only practical format. For players using specific custom versions like "Supernova
Safe travels, and may your Shiny Charm never glitch. On the 3DS, a