Well, perhaps in this fanfic, the 12 - tails has some unique powers that are different from the other tailed beasts. For example, it can control time on a small scale. Naruto then has to learn to adapt to this new power while trying to tame the 12 - tails. He might start by trying to communicate with it in his mind, like he did with the nine - tails.
Perhaps in this fanfic, Naruto becoming the Nine - Tails means that he has to face a new set of challenges related to his identity. He has always been Naruto Uzumaki, the boy with the Nine - Tails inside him. But now, being the Nine - Tails, he might question who he really is. Is he still Naruto, or has he become something entirely different? This internal struggle could be a major part of the story, while he also has to deal with external threats who see him as a new and dangerous force.
Well, the plot could involve Tails' friends being really surprised at first. Maybe Sonic would be a bit confused but still supportive. Tails, as a girl, might have to adjust to different things like how she's treated in the Sonic world. She could also discover new abilities or interests that come with her new form.
Another idea is that the Ten Tails' power has some sort of connection to the Greek gods in the Percy Jackson world. Maybe it was once a creation of the gods or has some ancient link. Naruto, being the host of the Ten Tails, is drawn to the Percy Jackson world to uncover this mystery. Percy helps Naruto navigate this new world while also trying to figure out if this new arrival is going to cause chaos or bring a new form of balance.
One possible plot could be that Naruto and Yugito are on a mission together in a forest. They discover a strange magical area that gives them cat tails. This new feature causes some humorous situations as they try to adapt to having tails while still carrying out their mission. For example, Naruto accidentally knocks things over with his new tail, and Yugito has to teach him how to control it. They also find that the cat tails give them some new abilities, like enhanced balance and stealth, which helps them in their mission against an enemy ninja group.
In this fanfiction, the 11 - tails could be a symbol of a long - forgotten power. It might be linked to an ancient prophecy. Naruto would be drawn into the mystery of the 11 - tails. Along the way, he would face many challenges, like dealing with those who fear the power of the 11 - tails and want to destroy it without understanding it. He would have to convince them that there is a better way, perhaps by showing that the 11 - tails can be a force for good if properly controlled.
Perhaps the fanfic could involve Naruto having to make a choice about how to use the power of the Juubi Ten - Tails Eye. He could either use it to dominate the Ninja world or use it to bring about a more equal and just world. Along the way, he would face many challenges, both from those who oppose him and from the power itself, which might be trying to corrupt him. His friends and family would play a crucial role in guiding him to make the right choice.
Well, a possible plot for a 'naruto with tails fanfic' might involve Naruto using his tails to travel to different dimensions. In these dimensions, he could encounter alternate versions of his friends and enemies. He might have to use the unique abilities of his tails to find his way back home. Or perhaps his tails start to develop a mind of their own and he has to work with them rather than against them to become stronger. Maybe he discovers that his tails hold the key to unlocking a long - lost prophecy related to the Hidden Leaf Village.
Well, it could be about Naruto somehow having to control or deal with the power of the Ten - Tails. Maybe he has to fight an enemy who also wants to harness that power.
Well, a cool plot might be that Naruto uses the Nine - Tails to travel to different dimensions. He could explore places that were previously unknown and discover new powers or allies there. Also, in the fanfic, he could use the Nine - Tails' chakra to heal the land that was damaged by previous battles. This would show his growth not just as a fighter but also as a protector of the village and its surroundings.
One possible plot twist could be that Naruto, as the Ten - Tails Jinchuuriki, has a hard time controlling the power at first. He might accidentally cause destruction in the Hidden Leaf Village. His friends would initially be afraid of him, but then they realize they need to help him master this power. For example, Sasuke could use his Sharingan to help Naruto understand the chakra flow better.