Since the game never left Japan, fan-translation patches exist (for emulators like PCSX2). But patching a ROM doesn't patch a save file.
Since the PS2 uses memory cards, you cannot simply plug a USB drive into the console and copy a file from the internet without tools. Here are the three main ways to use downloaded save data:
If you want, I can:
If you play PS2 games on a backward-compatible PS3 (fat models) or use a PS2 Classic on a modded PS3:
This is the trickier route. The PS2 did not have native USB save file support like the PS3 or PS4. To transfer a downloaded save from your PC to a physical PS2 memory card, you have three options:
A practical article would compare:
Is using someone else’s save data "cheating?" In the single-player community, opinions vary. If you have beaten the game before on a different console or you lost your childhood memory card due to corruption, a save file is a restoration of lost progress. If you have never played the story mode, using a 100% save immediately spoils all the boss fights and cutscenes.
The Technical Warning: Naruto Shippuden: Ultimate Ninja 5 uses a checksum system. If you simply copy a random save file from the internet, you might get a "Data Corrupted" error. This usually happens due to region mismatches.
Always download save data that matches your specific game version (SLPS-25822 for JPN or SLES-55543 for PAL).