Well, in such fanfictions, Naruto often has to face Sasuke at his darkest moments. Naruto might use his own experiences of being an outcast in the village to relate to Sasuke. He could tell Sasuke that even though they had difficult pasts, they can still create a better future. Naruto may also physically fight Sasuke to stop him from going too far into the dark side. And through this fight, Naruto manages to break through Sasuke's emotional barriers and make him see the light again.
A common scenario in these fanfictions is Naruto's determination. He never gives up on Sasuke. He might follow Sasuke into dangerous situations, like when Sasuke is on the verge of joining forces with evil organizations. Naruto's ninjutsu skills also play a role. He could use his Rasengan or other powerful techniques not just to defeat Sasuke physically if necessary, but also to show Sasuke that he has grown stronger. This growth might make Sasuke realize that he doesn't need to go down the dark path to become strong and that he can find strength in his relationship with Naruto and the village.
In many Naruto fanfictions, Naruto saving Sasuke from darkness is a popular theme. One aspect could be that Naruto uses his unwavering friendship. He constantly reminds Sasuke of their bond, like the times they trained together as kids. Naruto's positive attitude towards life and his dreams of becoming Hokage also inspire Sasuke. For example, Naruto might show Sasuke that there is more to life than revenge, and that by working towards a positive goal, he can find true happiness and purpose.
In this fanfic, Sasuke could sense Naruto was in a dangerous situation with Sakura. Maybe Sakura, under some dark magic influence, was about to harm Naruto unconsciously. Sasuke, with his quick reflexes and strong power, rushed in between them. He used his Sharingan to break the magic's hold on Sakura and saved Naruto. Then Naruto and Sasuke had a moment of understanding, looking at each other with a new level of respect and friendship.
The first key element is Naruto's understanding of Sasuke. He knows Sasuke's past, his pain, and his motives. This understanding allows him to approach Sasuke in a way that can reach him. Second, the role of the ninja world around them. The village's values, the other characters' opinions, all can influence Sasuke's journey. For instance, if the village shows forgiveness and acceptance, it can be a factor in pulling Sasuke back from the dark. And finally, the internal struggle within Sasuke. There's the part of him that wants to be saved by Naruto and the part that is consumed by darkness, and this struggle is central to the fanfiction.
One possible plotline could be that Naruto has to go through a series of dangerous trials in the enemy's territory to reach Sasuke. He might face powerful foes and have to use new jutsu he's developed. Another plotline could be that Sasuke is in a coma, and Naruto uses his chakra to somehow enter Sasuke's mind and fight off the inner demons that are keeping Sasuke trapped. Maybe Naruto also has to convince Sasuke's friends from his time away to help him in this rescue mission.
One consequence could be a change in the relationship between Naruto and Sasuke. Sasuke might become more enraged or, on the other hand, he could start to question his actions. As for Naruto and Ami, their bond might grow stronger. Ami would likely be very grateful to Naruto, and this could lead to a closer friendship or even something more in the future of the fanfiction.
One consequence could be that Sasuke becomes even more enraged at Naruto. Since Sasuke's pride might be hurt by Naruto interfering, he could vow to get revenge on Naruto later. Another consequence is that Amy might become indebted to Naruto. She could then offer to help Naruto in his future battles or quests in the fanfiction.
It shows the strong bond between the two brothers. Despite all the complications in their relationship, Itachi still cares deeply for Sasuke and is willing to risk a lot to save him from a great danger like Orochimaru.
One interesting fanfic could be 'Sasuke's Redemption in Saving Fem Naruto'. In this fanfic, Sasuke discovers that Naruto, who is female in this version, is in a dangerous situation. He uses his newfound powers and his sense of loyalty to rescue her. It shows a different side of their relationship, with Sasuke being more protective.
Fanfictions with 'naruto the darkness' in the title often explore the less - seen aspects of the Naruto world. It could be that the power of the tailed beasts is used in a more malevolent way. The story might revolve around a group of anti - heroes or villains who are trying to reshape the Naruto universe according to their own dark desires. There could also be a sub - plot about forbidden jutsus that have a corrupting influence on those who use them, and how the main characters deal with this new and dangerous threat.
One emotional moment could be when Naruto makes the final decision to sacrifice himself for Sasuke. His friends are left in shock and disbelief. The moment of his death is often filled with his thoughts of all the good times and his unwavering belief in Sasuke's redemption.
A possible plot is that Sasuke is in a different dimension and Naruto has to figure out a way to travel there to save him. He might have to gather some special items or learn new jutsus to make it possible. Or perhaps Sasuke has lost his memories and Naruto has to help him regain them while protecting him from those who want to use his amnesia for their own gain. In some fanfics, Sasuke could be in a coma and Naruto uses his own chakra to try and wake him up, which could lead to some really emotional and intense scenes.