Use both. Use the Memory Card for your main progress and use Save States (usually F1 to save, F3 to load) to retry difficult battles instantly.
Ensure the save file matches your game version. Naruto Shippuden Ultimate Ninja 5 Save File Pcsx2 All
(UN5) to be a "very good closure" for the series on the PlayStation 2. Using a 100% save file on the emulator is a popular way to bypass the game's heavy grind and experience its full roster instantly. Why Fans Love the "All Unlocked" Experience Use both
Once your save is active, do not just play standard matches. Dive into the hidden content: (UN5) to be a "very good closure" for
Find the memcards folder (typically in Documents/PCSX2/memcards on Windows). :
Open your Mcd001.ps2 file in mymc, click the Import icon, and select the Naruto save you downloaded.