If you're looking to update your copy of Mario Odyssey to the latest version officially, you can do so through the Nintendo eShop on your Nintendo Switch. Nintendo periodically releases updates for the game, adding new content or fixing issues.
The Ultimate Guide to Super Mario Odyssey Updates: NSP and Version Details mario odyssey nsp upd
If you're looking to update your copy of Mario Odyssey to the latest version officially, you can do so through the Nintendo eShop on your Nintendo Switch. Nintendo periodically releases updates for the game, adding new content or fixing issues.
The Ultimate Guide to Super Mario Odyssey Updates: NSP and Version Details