It could be that the characters in Naruto have a distinct personality and world - view that don't mesh well with the Fairy Tail universe in fanfiction. For example, Naruto's values of hard work and friendship in his own ninja world are different from how they might be portrayed when forced into the Fairy Tail setting. Fans who are loyal to Naruto's original concept might hate seeing it distorted in Fairy Tail fanfiction.
Mostly, it's hard to find solid evidence. It could be just a vocal minority within the 'Fairy Tail' fandom who feel this way. There's no official statement from the creators of 'Fairy Tail' or any large - scale surveys showing that the entire 'Fairy Tail' fan base hates 'Naruto' fanfiction. It could also be that this statement is an over - generalization of some sporadic negative reactions.
One possible reason is the difference in power systems. Naruto has its chakra - based ninja abilities, while Fairy Tail has magic. Combining them in fanfiction might seem forced and not make logical sense to fans of Naruto.
Well, it could mean that the 'Fairy Tail' fandom has some sort of dislike for 'Naruto' fan - made stories. Maybe it's because of differences in the story styles, themes, or the fan cultures of the two series. For example, 'Fairy Tail' has its own unique magic - based world and set of characters, and fans might feel that 'Naruto' fanfiction somehow doesn't mesh well with their perception of the 'Fairy Tail' universe.
Some fans of Naruto might be intrigued as it shows a different side of their beloved character. They may be interested in seeing how Naruto reacts in this unusual scenario with a character from another series. For Fairy Tail fans, it could be a bit of a shock at first, especially if they are big fans of Erza. But it might also draw their attention as it's a new and different take on their character.
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.
Maybe Natsu hates Fairy Tail fanfiction because he doesn't like how some fanfictions distort the original story or the characters. In the original Fairy Tail, he has a clear personality and relationships, and fanfictions might change that in ways he wouldn't like.
Sure, there may exist such fanfictions. In the official 'Fairy Tail' story, Natsu and Lucy are very close. But fanfiction is a world of creativity and deviation from the original. A writer might decide to make Natsu hate Lucy due to some made - up reasons like a misunderstanding or a conflict of interests. This could lead to a whole new set of adventures or conflicts within the 'Fairy Tail' universe as rewritten by the fanfiction author.
First, you need to understand the universes of Naruto, Irene's character from Fairy Tail, and the general world of Fairy Tail. Research their powers, the cultures in those worlds. Then, come up with an interesting plot. It could be a crossover adventure where Naruto and characters from Fairy Tail have to face a common enemy. For example, a new villain that threatens both the ninja world and the magical world of Fairy Tail. Irene could be a key character in this, either as a helper or a more complex figure with her own motives.
A fanfic could focus on a new character who has the powers of Naruto's chakra system and is also related to the Strauss family in the Fairy Tail world. This character could go on adventures in both the Naruto and Fairy Tail universes, facing challenges like the Akatsuki in Naruto and dark guilds in Fairy Tail. They might use Naruto - style combat techniques along with Fairy Tail magic.