Perhaps he uses some ninja techniques like a shadow clone jutsu. He could make multiple clones to help him sort through and complete the paperwork quickly.
Maybe Naruto discovers a hidden scroll that has a spell or technique specifically for dealing with paperwork. He then uses this new - found knowledge to make all the paperwork disappear or transform into something more manageable, like a single small scroll that contains all the important information in a condensed form.
In certain fanfictions, Naruto could approach the paperwork in a more diplomatic way. He might convince others in the village, like his friends or some of the ninja clans, to help him with the paperwork. By using his charisma and leadership skills, which he has developed over time, he gets everyone to pitch in. And with their combined efforts, they manage to defeat the mountain of paperwork. After all, Naruto is not just a powerful fighter but also a great leader who can inspire people to work together.
It depends on the specific fanfiction. Some might have Naruto develop strategies or skills to overcome the paperwork challenge. Others might not focus on this aspect at all.
Their relationship would likely grow stronger. Naruto would gain more respect for Hiruzen as he sees the amount of work the old Hokage has to do. And Hiruzen would see Naruto's eagerness to help and grow. This could lead to Hiruzen giving Naruto more responsibilities within the village.
Well, Naruto might bring his unique energy to the task. He could start by getting distracted easily, like seeing a cool jutsu diagram on a paper and wanting to try it out right away. But then he'd remember he's there to help Hiruzen. Naruto might come up with some unorthodox ways of organizing the papers, like sorting them by how much 'fun' he thinks the mission described on them would be. And his presence would surely make the usually dull paperwork a bit more lively for Hiruzen.
In some fanfictions, Naruto might defeat Zabuza through new jutsu. For example, he could develop a unique shadow clone variation that overwhelms Zabuza's water jutsu. Maybe he combines his Rasengan with some unexpected element, like wind chakra in a new way that Zabuza can't counter.
One common element is Naruto's growth. He usually has to reach a new level of power or understanding to defeat Madara. For example, he might gain a new jutsu or a deeper connection with his inner chakra.
Another possibility is that Naruto could defeat Kakashi if the latter was in a weakened state. Maybe Kakashi had just come out of a tough battle with other powerful enemies and was low on chakra. Meanwhile, Naruto was at his peak, full of energy and ready to fight. In this situation, Naruto's sheer determination and his own strong abilities could lead to his victory.