As a vigilante, Naruto could start to rely more on his Sage Mode's sensory abilities. This would help him detect threats from a distance and plan his attacks more effectively. He could also combine this with his shadow clone jutsu in a new way, like using the clones as decoys while he uses Sage Mode to make the real strike.
His powers might be more understated as a vigilante. Instead of using his flashy jutsus openly, he could develop more stealth - based techniques. For example, he might modify his Rasengan to be a silent and more deadly attack for surprise attacks on criminals.
His physical strength would likely increase significantly. Hollows are known for their brute force. So Naruto could have enhanced speed and strength in combat. His ability to move around might change too, like being able to 'flash step' similar to how hollows move in 'Bleach'.
Well, Naruto's powers would likely change quite a bit in a Naruto becomes Menma fanfiction. Menma is shown to have a more natural and effortless control over his abilities. So Naruto might find that his Rasengan becomes easier to form and manipulate. Also, his ability to sense danger and opponents might be enhanced in a different way than before. His connection to the natural energy around him could be more in tune with Menma's style, leading to new and different applications of his existing powers.
Well, Naruto's ability to sense things could change completely. His machine parts could be equipped with advanced sensors. For example, he could detect hidden traps or enemies from much further away. He might also be able to interface with other mechanical devices. If there were some sort of mechanical security system in a building, he could hack into it using his own machine components. And his Nine - Tails chakra might interact with the machine parts in unexpected ways. Maybe the energy from the Nine - Tails could power up his mechanical functions even more, or the machine parts could help him control the Nine - Tails chakra more precisely.
Well, Naruto's powers are quite diverse. If he becomes Tsuchikage, his Sage Mode would be a huge asset. He could use it to sense any disturbances in the earth around Iwagakure, almost like an early warning system. His shadow clones could be used for various tasks within the village, from construction to scouting. And his power to communicate with the tailed beasts might lead to some new discovery in Iwagakure. Maybe there are some ancient earth - based tailed beast secrets that he could uncover, which could give Iwagakure an edge in terms of power and knowledge.
His ninjutsu might be enhanced by the magic in the Fairy Tail world. For example, his Shadow Clone Jutsu could have a magical aspect, like leaving behind a trail of magic energy. His Rasengan could also be powered up by the ambient magic, making it even more destructive.
His powers would likely be enhanced to a godlike level. For example, his Rasengan might be able to destroy entire landscapes with a single throw. His speed could be so great that he appears to teleport. His chakra reserves would be seemingly infinite, allowing him to spam powerful jutsus without getting tired.
Well, he might gain the power of creation. As a primordial god, Naruto could create new worlds or dimensions. He could also have the power to manipulate time, perhaps stopping it or reversing it in certain areas. And of course, his physical strength would be on a whole new level, able to effortlessly destroy mountains with a single punch.
His water - related powers could take on a more primal and destructive form. Since Titans are associated with great power, his control over water might become more like the force of a tsunami rather than just simple manipulation.
His fighting style would be more brute - force based. Instead of using all those ninja techniques in a strategic way, he'd just charge in and start slashing like Kenpachi.
Another aspect of their power interaction could be in the area of teamwork. Naruto is used to fighting as part of a team in his world. Gwynevere, with her different powers, could fit into that team dynamic in a unique way. For example, if Naruto creates a diversion using his shadow clones, Gwynevere could use her magic to attack the enemies from a different angle. Their combined powers could be much more effective than either of them working alone, and they could develop new battle strategies based on how their powers complement each other.