These files are exact 1:1 copies of physical game cartridges. They often include "padding" data to match the standard sizes of physical media.
These include vital performance patches and bug fixes. For instance, Version 3.0.1 addressed a critical soft-lock bug involving the Pokémon Inkay, while Version 4.0.0 introduced optimizations for newer hardware. pokemon violet switch nsp xci dlc update eshop fixed