Well, if Naruto had both halves of Kurama, he would be incredibly powerful. His chakra reserves would likely be off the charts. He could perform more powerful jutsus with ease and might even be able to take on stronger opponents single - handedly. For example, in battles against the Akatsuki, he could have ended the fights much quicker.
Well, having both halves of Kurama would significantly boost Naruto's power level. Kurama is already an extremely powerful tailed beast, and with the complete form, Naruto would have access to even more chakra. His attacks would be more powerful, and he could probably use some new and enhanced forms of his existing jutsu. For example, his Rasengan might become much larger and more destructive.
In terms of physical training, Naruto would need to train his body to withstand the greater power of both Kurama halves. He could do more strenuous exercises like lifting extremely heavy weights or running at high speeds for long distances while in a Kurama - enhanced state. Also, his mental training would be crucial. He would need to be mentally strong to handle the influence of both Kurama halves on his mind and to be able to access their power when needed without losing control.
He might gain the ability to teleport short distances. Since Kurama's chakra is so powerful, it could potentially warp space around Naruto for a quick teleport. Another new ability could be a more powerful chakra shield. With both halves of Kurama, he could create a shield that not only protects him from physical attacks but also nullifies ninjutsu to some extent.
I'm not sure specifically as there could be many different fanfics with that title. It might be about Naruto's relationship with both halves of Kurama, perhaps exploring how he interacts with the yin and yang parts of Kurama in new and unique ways, like in battles or in his personal growth journey.
The Kurama Brothers could be entities that have a similar origin to Kurama. They might have been part of the same chakra - based creation in the Naruto universe. They could possess some of Kurama's traits like great power and a connection to the natural energy in the world. They are often depicted as having their own personalities, with one being more hot - headed and the other more calm and calculating. Their relationship with Naruto usually involves them using their powers and knowledge to help Naruto grow as a ninja and a person. They might also have their own goals and motives that are intertwined with Naruto's journey.
Well, Kurama might train Naruto by teaching him how to better control and access chakra. Since Kurama has a vast amount of chakra, it could show Naruto unique ways to harness and use it. For example, it could guide Naruto in creating more powerful and complex jutsu by using their combined chakra in a more efficient way.
You could start by looking on popular fanfic websites like FanFiction.net or Archive of Our Own. Just type in the title in their search bars and see if it pops up.
In the fanfiction, since Naruto has Kurama, he has a great source of chakra. Hinata with Nibi might also have enhanced abilities. They could team up against common enemies. Naruto's brash and bold nature combined with Hinata's calm and gentle demeanor, along with their newfound powers from Kurama and Nibi respectively, would make for an interesting dynamic. Maybe they would develop new jutsus together that utilize both Kurama and Nibi's powers.
Kurama might become angry at first. He's a powerful being and being neglected would likely wound his pride. He could start causing some minor disruptions inside Naruto, like making it harder for Naruto to access his chakra.