For the original Storm , don’t skip side quests—they’re not just filler. And if you just want to play locally with friends, use the Battle Settings to temporarily enable locked characters for versus mode (some versions allow this).
Many characters are tied to optional “Ninja Skills” missions found throughout the Hidden Leaf Village. For example: naruto ultimate ninja storm how to unlock all characters
For the most accurate and detailed guide, referring to the game's official manual or online forums dedicated to the game can be very helpful. For the original Storm , don’t skip side
Clear their respective "Sannin" encounters. Kabuto & Might Guy : Clear their specific story missions. Kimimaro : Clear "Battle with the Sound Begins". Unlocking Special Forms For the original Storm