One new ability could be enhanced physical combat skills. Tsunade's strength gives Naruto the power to deliver more powerful punches and kicks, which could be a game - changer in close - quarters battles. He might also develop the ability to use medical ninjutsu more effectively. Since Tsunade is a master of it, Naruto could learn to heal himself and others faster during battles, adding a new dimension to his fighting capabilities.
He could develop the ability to sense physical weaknesses in opponents more accurately. Tsunade's experience with her strength might give Naruto an edge in finding the vulnerable points of his enemies. Also, Naruto might develop a new type of strength - based ninjutsu. For example, he could create shockwaves with his punches like Tsunade does, but perhaps with his own Naruto - style twist, like infusing it with his wind - style chakra for added cutting power or range.
Naruto could develop the ability to break through stronger defenses. Tsunade's strength allows her to shatter rocks and withstand powerful blows. Naruto, with this strength, could break through enemy fortifications or even break the defenses of tough opponents more easily. Additionally, he might be able to develop a new form of chakra control that is related to Tsunade's way of using her strength, which could lead to even more unique jutsu in the long run.
One new ability could be the power to charge his own body with kinetic energy for enhanced physical attacks. He could deliver punches or kicks that explode on contact, similar to Gambit's charged staff strikes. Another ability would be to create energy barriers by rapidly charging the air around him. This would be a great defensive move, something Naruto currently lacks in his regular skill set. He could also potentially use Gambit's power to sense the energy levels of his enemies from a distance, giving him an advantage in strategizing his attacks.
Well, in such a fanfiction, Naruto might use Tsunade's strength in combat in a more aggressive way. For example, her superhuman strength could be combined with Naruto's own combat skills. Maybe Naruto could now deliver more powerful punches and kicks during battles, like how Tsunade does when she's fighting. This could also change the way Naruto approaches opponents, relying more on close - range combat rather than just long - range jutsu all the time.
He could develop the ability to combine the power of the Sharingan with the Nine - Tails' chakra. Maybe he could use the Sharingan to better control the Nine - Tails' power, for instance, seeing the flow of the chakra inside him more clearly. This could lead to new jutsu that are a fusion of Uchiha and Uzumaki techniques.
He could develop the ability to use the Six Paths Sage Mode more effectively. Since the Rinnegan is related to the Sage of Six Paths, it would enhance his connection to that power. He might also gain the ability to create chakra chains similar to those of the Uzumaki clan but with an added Rinnegan - powered twist.
In this fanfiction, Naruto could potentially develop the ability to create dark energy constructs like Raven does. For example, he could form weapons out of this energy, giving him an extra edge in close - combat situations. He may also inherit Raven's power of flight, which would completely change his mobility in battles and how he approaches combat scenarios. Additionally, Naruto could gain the power to absorb and redistribute energy, which could be used to either heal himself or boost his attacks. This new set of abilities would not only make Naruto more powerful but also open up new storylines and character developments within the fanfiction.
Naruto could inherit Tsunade's medical ninjutsu skills. This would be a huge addition to his arsenal. He could use it to heal his comrades more effectively during missions. Also, he might inherit her ability to store chakra in his forehead. This would give him an extra boost of power when he needed it most. And perhaps he could also learn some of Tsunade's more precise combat techniques that rely on her strength and accuracy.
He could develop the ability to use the Preta Path more effectively. This path allows the user to absorb chakra, and Naruto could use it to nullify enemy attacks that rely on chakra. For instance, if an enemy uses a powerful fire - style jutsu that is chakra - based, Naruto could absorb the chakra of the attack, rendering it useless.
He could develop the ability to transform into a more powerful form that combines the features of all nine tailed beasts. Maybe he could have nine tails of different colors or shapes, each representing a different tailed beast, and with each tail comes a special power.
He could develop the ability to better withstand the different climates in One Piece. Since he's immortal, he might experiment with his body in ways others can't. Maybe he could learn to breathe underwater like a fish - man over time due to his long - lasting life.
Naruto might be able to create an explosive version of his Uzumaki Barrier. He could coat the barrier with explosive clay so that when enemies touch it or he detonates it on purpose, it explodes. Also, he could develop a new jutsu where he throws explosive clay in the form of his toads and when they land near the enemy, they explode, kind of like a summon - based explosive attack.