Understanding this process is crucial. A mismatched region (e.g., using a European save on a US ISO) will result in the emulator failing to read the data. Therefore, the utility of the save data is entirely dependent on the user's technical diligence in matching the region of their game ISO with the region of the downloaded save.
To get all 62 characters and hidden items, you can download pre-completed virtual memory card files from reputable community sources. These are typically provided in .ps2 (raw), .max (Action Replay Max), or .psv (PS3 virtual card) formats. naruto ultimate ninja 5 save data aethersx2 free