It is not possible to write a meaningful academic or critical essay based on the filename "Pokemon Legends Arceus -NSP--Update 1.1.1-.rar".
Legality: Distributing or downloading copyrighted game ROMs/NSPs is a violation of Nintendo's Intellectual Property Policy and is considered digital piracy.
If you are still playing Version 1.0.0 or 1.0.2, you are missing roughly 20+ hours of endgame content. The 1.1.1 update adds:
Using a Package Installer:
You can now rematch Frenzied Noble Pokémon (Kleavor, Lilligant, Arcanine, Electrode, Avalugg) with higher difficulty levels. These battles test your dodging and balm-throwing skills to the limit.
Whether you are using a modded Switch (Atmosphere) or a PC emulator, the process is similar.
Transferring NSP Files: Moving the NSP file to your Switch's SD card, usually into a specific folder like switch or a folder specified by the tool you're using.