I have an Ultimate Ninja 3 saved game in my memory card, yet no extra characters are unlocked ( excluding deidara, sasori, itachi, kisame, chiyo etc.)
Can somebody troubleshoot for me?
You need to make sure the games are from the same region (especially if you modified your PS2). *If you have the Japanese version of UN3 and the European version of UN4 then you will not be able to use the save file from UN3 to unlock anything in UN4. *This is because the game saves have different names on the memory card based on the region the game is from.
This is the same reason why a game save from the European version of UN3 will not work with the game save from the Japanese version of UN3. *ALL Playstation game saves only work with games from the same region.
@johan_sharingan - Please do not discourage others like that. *It's one thing to have an opinion, it's another to basically insult others because they don't share your opinion.