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.
In a Fairy Tail fanfiction, Naruto's powers could be different in terms of how he uses them in combat. He might combine his chakra control with magic spells. So instead of just using the Rasengan as a pure physical attack, he could infuse it with a magic element like fire or ice from the Fairy Tail magic system. Also, his ability to sense danger, which is already good in the Naruto world, could be heightened by the magical auras present in the Fairy Tail universe.
Naruto's godlike powers in a Fairy Tail fanfiction would likely be different in the way they interact with the world around him. Since Fairy Tail has a very different power structure and environment compared to Naruto's world. His Sage Mode, for instance, could be influenced by the natural magic energy in the Fairy Tail world. He might be able to draw in magic energy instead of just natural energy to enter Sage Mode. And his Nine - Tails chakra could have a different form or function, maybe it could be used to break through powerful magic barriers that are common in the Fairy Tail world.
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, Goku's powers are extremely powerful. In Fairy Tail, magic is the main power source. Goku's ki-based abilities could be seen as a super-advanced form of magic. His super strength, speed, and energy blasts could make him a formidable ally or a terrifying foe. He could easily take on some of the stronger dark guilds by himself. Also, his ability to constantly grow stronger through training would be a unique aspect compared to the mages in Fairy Tail who mainly rely on learning new spells.
In a Fairy Tail fanfiction, the Hulk's powers would likely cause quite a stir. His raw strength is his most notable power. In the Fairy Tail universe, this could make him a feared or respected figure. If he were to join the Fairy Tail guild, his way of fighting would be very different from the mages. He doesn't rely on incantations or magical spells. Instead, he just uses his fists. This could inspire some of the younger mages to think about different ways of fighting. Also, his power that grows with anger could be seen as a sort of uncontrollable magic. The guild might have to find a way to help him manage his anger so that he doesn't go on a rampage and cause destruction to the guild or its surroundings.
Gohan's powers could be a great addition to the Fairy Tail universe. His Saiyan strength and ability to go Super Saiyan would make him one of the most powerful mages in the guild. He could use his ki blasts like powerful magic attacks, and his speed and agility would be useful in battles against dark guilds.
If Naruto joined Fairy Tail, his powers would likely be a very interesting addition. His chakra-based abilities like the Rasengan could be a unique form of magic in the Fairy Tail universe. He might have to learn to control his chakra in a new way to fit with the magical rules there. Maybe he could combine his shadow clone jutsu with some Fairy Tail magic for some really cool combat moves.
Well, Goku's powers are mainly based on ki manipulation, which is somewhat similar to magic in the Fairy Tail world. If he joins Fairy Tail, he could probably learn to combine his ki with the magic of Fairy Tail. For example, he might be able to infuse his ki into Natsu's fire magic to make it even more powerful. Also, his teleportation technique, like Instant Transmission, could be a great asset during battles and rescue missions in the Fairy Tail universe.
Ichigo's powers would adapt by evolving through new challenges. In Fairy Tail, he'd face different kinds of enemies compared to Bleach. His ability to sense spiritual pressure might be tweaked to sense magic power instead. His Hollow powers, which are often seen as a dark side in Bleach, could be seen as a powerful and somewhat unruly form of magic in Fairy Tail. He would need to learn to control it better in the new environment.
Well, Gaara's sand - based powers could be really unique in the Fairy Tail universe. His ability to control sand could be seen as a new type of magic. Maybe he could use it in combination with Fairy Tail's team - based combat. For example, he could create sand barriers to protect his teammates during battles, just like he did in his own world to protect his village.
Naruto's powers, like the Rasengan and his ability to summon toads, would be seen as very unique. The Fairy Tail wizards would be both amazed and a bit confused at first. Itachi's Sharingan would be considered extremely powerful and perhaps a bit terrifying. His genjutsu abilities might be mistaken for some kind of dark magic at first. But once they understand that Naruto and Itachi are on their side, they would be respected for their powers.
Naruto's chakra - based powers and Lucy's celestial magic could interact in really cool ways. For instance, Naruto could use his Rasengan and infuse it with the magic power from Lucy's celestial spirits. Maybe a spirit like Aquarius could provide water - based magic that Naruto could use to make a more powerful water - style Rasengan.