As an NSP file, this package is designed for installation on the Nintendo Switch operating system.

The filename you may have encountered – Pokemon Legends Arceus -NSP--Atualizacao 1.1.1 – is not an official Nintendo release. Instead, it is a pirated package created by scene groups to distribute the update for use on emulators (like Ryujinx or Yuzu) or hacked Switch consoles.

The inclusion of “Atualizacao” suggests the uploader repackaged the Brazilian Portuguese version of the patch, likely to serve Portuguese-speaking communities. While the update itself is legitimate software, distributing it outside Nintendo’s CDN (Content Delivery Network) violates copyright laws and Nintendo’s terms of service.

If you own a legitimate copy of Pokémon Legends: Arceus (physical or digital), updating is simple:

The console will automatically download and install the latest version (now 1.1.3 or higher, depending on region). No NSP files, SD card hacking, or PC emulation required.