I haven't actually read this specific 'sonic and tails fight fanfiction' yet. But generally, in Sonic fanfictions, the fights between characters can be really exciting. They often show off different abilities of Sonic and Tails. Maybe in this one, it could be about a misunderstanding that leads to their fight, like one thinking the other has been influenced by some evil force.
One possible reason could be some kind of strange chakra infusion. Maybe he comes into contact with a powerful and mysterious chakra source that mutates his body in a way that causes tails to grow. Another reason might be related to some ancient curse or prophecy. It could also be the result of a new jutsu he attempts that goes wrong and has unforeseen physical consequences.
One possible reason could be a misunderstanding. Maybe Sonic accidentally broke something of Tails' while on a high - speed chase. Tails, being a bit sensitive about his inventions, might get angry and start a fight.
The fight could end with Sonic realizing he was wrong. If it was a misunderstanding, Sonic's quick thinking and good heart would make him apologize to Tails, and they would make up.
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.
In certain fanfiction, Naruto is indeed the Ten - Tails. This could be a really cool concept as it combines Naruto's already powerful nature with the ultimate power of the Ten - Tails. It might lead to stories where Naruto has to struggle with the dark side of such power, or he could use it to bring about a new era of peace in the ninja world. Maybe he would have to face off against old enemies who are now even more afraid of his new - found strength.
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 possible plot could be that there is a powerful new item in their world. Sonic thinks it should be used immediately to stop Dr. Eggman, but Tails believes they need to study it more first. This disagreement leads to a fight as Sonic tries to take the item by force and Tails tries to stop him.
Well, initially, Naruto might show kindness towards the Nine - Tails despite it being a powerful and somewhat feared entity. He could try to communicate with it on a deeper level. The Nine - Tails, in turn, might be intrigued by Naruto's tenacity. As time passes, they begin to trust each other more. Naruto may share his dreams and fears with the Nine - Tails, and the Nine - Tails might start to see Naruto as someone worthy of its friendship.
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.