In that fanfiction, it might be designed that way. Naruto has incredible powers in his own series, like his various jutsu. If translated into the Fairy Tail world in fanfiction, his skills could potentially make him very powerful. But it also depends on how the author of the fanfiction interprets and balances the power systems of both universes.
His chakra. Chakra is like the energy source in Naruto's world. In the fanfiction, this chakra could be translated into a very powerful form of magic in Fairy Tail. It gives him the ability to perform various powerful techniques, much like mages in Fairy Tail use their magic.
Well, in such a fanfic, Naruto would likely be considered the strongest. Since it's a 'Naruto strongest' concept in a Fairy Tail setting, Naruto brings his powerful ninja skills like the Rasengan and Shadow Clone Jutsu. His ability to quickly adapt and his large chakra reserve would give him an edge over many Fairy Tail characters.
Naruto has several abilities that set him apart. His Rasengan is a unique and powerful attack that can be modified in different ways, like the Big Ball Rasengan. His Shadow Clone Jutsu is not only useful in combat but also in training as he can gain experience from all his clones at once. The Nine - Tailed Fox chakra within him is a huge power source. When he taps into it, his power level skyrockets. His ability to learn new techniques quickly and his unwavering belief in his friends and comrades also contribute to his strength in the context of this fanfic in the Fairy Tail world.
One idea could be a crossover where a Naruto character, like Naruto himself, somehow ends up in the Fairy Tail world and meets a cute mage, perhaps Lucy. They could team up on a mission and Naruto's unique ninja skills combined with the magic of the Fairy Tail mage would make for an interesting story.
Yes, there are quite a few. You can start by looking on popular fanfiction websites like FanFiction.net or Archive of Our Own. Just search for 'Naruto the Cutest Mage Fairy Tail' and you'll find a variety of stories, some might focus on crossovers between Naruto and Fairy Tail with the unique concept of Naruto as a mage.
To make the fanfiction engaging, create some conflict. It could be a conflict between the two worlds, like the ninjas in Naruto thinking the magic users from Fairy Tail are a threat. Or it could be an internal conflict within a character, such as the cute mage struggling to control their powerful magic while also trying to fit into the Naruto world. Also, don't forget to add some humor and heart - warming moments to keep the readers interested.
Well, in fanfiction, anything can happen. But Naruto being a weak Fairy Tail mage seems a bit off. Naruto is a powerful ninja with a strong will. In Fairy Tail, mages also rely on their willpower to some extent. Naruto could potentially draw on his ninja skills and combine them with magic in unique ways. For example, his shadow clone jutsu could be adapted into some form of magical clone spell. His Rasengan could be transformed into a magic - based attack. So, he may face some initial challenges in understanding magic, but he's not likely to be weak.
Well, in some fanfictions, Gray Fullbuster could be considered the strongest. His Ice - Make magic has a lot of potential for growth and development. He can create various ice constructs that are not only useful in battle but also extremely powerful. Also, his determination and the emotional depth of his character can drive him to reach great heights of power in these fictional interpretations.
The ninjas from Naruto are used to a more disciplined and hierarchical structure in their village. In contrast, the Fairy Tail members are more free - spirited. So, when Naruto meets the Fairy Tail guild, there could be some initial clashes. For example, Naruto might be confused by Natsu's impulsive and hot - headed nature. When it comes to Aquarius, Naruto could be respectful of her power as a spirit. He might try to learn from her about water - based abilities, while Aquarius could be intrigued by Naruto's chakra control.