It's a tall order. The Naruto universe has its own set of physical and metaphysical laws. But if one were to write such a fanfiction, they could start by building on the idea of the deep connection between Naruto and the Nine - Tails. Maybe there was a unique event that occurred during their bond - strengthening moments that led to this strange phenomenon. But still, it would be hard to convince die - hard Naruto fans as it strays so far from the original concept. So, while possible in theory, it's not easy to make it believable.
It's extremely difficult. Given the nature of Naruto and the Nine - Tails in the original Naruto lore, it goes against so many established rules. However, if the writer is creative enough to create a whole new set of rules and explanations, perhaps it could be made somewhat believable. For example, by introducing a powerful and unknown entity that can manipulate the very essence of chakra in ways not known before.
In the original Naruto canon, such a concept is completely against the established lore and is not possible. However, in the realm of fanfiction, while there might be some extremely out - there and non - canon ideas, I haven't come across one specifically with this plot. Fanfiction often has very creative and sometimes very strange ideas, but this one seems rather unorthodox and goes against the nature of the Nine - Tails as a powerful chakra - based entity, not a biological being in the traditional sense that can get pregnant.
In such a fanfiction, the plot might start with some ancient and dark jutsu that backfires on Naruto. As a result, the Nine - Tails gets pregnant. Naruto would be in a state of shock and confusion. He might seek help from the sages or other powerful ninja. Along the way, there could be those who want to use this situation for their own gain, while Naruto is trying to find a way to reverse the situation or accept it in a way that doesn't disrupt the balance of the ninja world.
No, such a concept is completely against the original Naruto lore and is inappropriate. In the Naruto series, the Nine - Tails is a powerful chakra - based entity, not something that can be involved in that kind of situation in the context of the original story.
In fanfiction, almost anything can be possible as it's a realm of creative interpretation. However, this concept goes against the original nature of the Naruto series where Naruto is male. But in fanfiction, some authors might use magic or some unique plot devices to make such a situation happen, but it's not in line with the canon.
Maybe through new jutsu or abilities. The fanfiction could give Naruto some unique power that allows him to communicate or negotiate with the Nine - Tails on a different level. He could use this power to show the Nine - Tails a different perspective, like the potential for harmony between them instead of constant struggle.
One interesting 'Naruto Gets Nine Tails' fanfiction could be where Naruto has an even deeper connection with the Nine - Tails than in the original series. For example, he can communicate with it telepathically without any chakra interference. Another one might be a fanfiction where Naruto uses the Nine - Tails' power in creative ways to solve problems that the original Naruto couldn't. Maybe he uses it to heal instead of just for combat.
Yes, in some fanfictions, Naruto is often depicted as having a very special connection to the Nine - Tails that goes beyond the normal relationship in the original story. For example, he might be able to fully control the Nine - Tails' power in ways not shown in the canon, or they could have a mental bond that allows for unique forms of communication and cooperation.
Well, in this 'Naruto gets Nibi pregnant' fanfiction idea, one consequence could be a huge scandal within the Hidden Leaf Village. Naruto is a respected figure, and such an unorthodox relationship would shock many. Also, from a genetic standpoint, we can only imagine the wild combination of Naruto's Uzumaki and Jinchuriki traits with the Nibi's feline - like and tailed - beast powers.
One possible plotline could be the chaos and shock that spreads throughout the ninja world when the news gets out. There would be reactions from their friends and enemies alike. Another could be Naruto and Karin trying to figure out how to handle the situation while also dealing with their own feelings for each other.
When Naruto goes full nine - tails in fanfiction, it often means a significant shift in the story's dynamics. His new power level can disrupt the existing power balance in the Naruto universe. He might attract the attention of more powerful and hidden enemies who see him as a threat. At the same time, he could also become a symbol of hope for those who are oppressed. For instance, if there are other villages being bullied by a stronger force, Naruto in his full nine - tails state could come to their rescue, thereby changing the political and social landscape of the Naruto world.