If you have a base NSP of Samurai Shodown , you will quickly notice issues. The launch version on Switch had moderate input lag and longer loading times compared to other platforms. The you are searching for likely refers to the patches (v1.2.0, v1.3.0, v2.0, etc.) that transform the experience.
To ensure you have the latest version (including major balance updates like Version 2.20), use the following official methods: samurai shodown switch nsp update dlc link
Remember to check your firmware (requires FW 15.0.1 or higher) and always run the game in Flight Mode to avoid Nintendo's CDN bans. If you have a base NSP of Samurai
: Visit the Samurai Shodown DLC page on Nintendo eShop to purchase Season Passes 1, 2, and 3. samurai shodown switch nsp update dlc link