The 1.3.0 update (often bundled with subsequent minor patches like 1.3.1) is officially known as the "Ver. 1.3.0" patch. Its primary function is to activate data embedded in the game card or previous downloads to unlock compatibility with the Pokémon Legends: Arceus connectivity and the "Daybreak" subplot.
For those with a custom firmware (CFW) Switch like , you can install the update directly on your console: pokemon shining pearl nspupdate 130rar work
Use a trusted, reputable extraction tool like WinRAR or 7-Zip. Right-click the file and select . pokemon shining pearl nspupdate 130rar work