Well, a common theme is the alteration of relationships. With the Evil Rinnegan, Naruto's relationships with his friends and allies could change drastically. For example, some friends might be scared of him or turn against him. And in terms of the story's setting, it often involves a darker, more dangerous world. Since Naruto has this evil power, the balance of power in the Naruto universe is disrupted. Enemies might be more aggressive or new, more powerful enemies could emerge, drawn to the power of the Evil Rinnegan. It also often has themes of mystery, as the origin and true capabilities of the Evil Rinnegan in these fanfictions are usually something to be uncovered.
The theme of isolation is often present. Naruto, having the Evil Rinnegan, might find himself isolated from those he once cared about. His new power could be seen as too dangerous or his actions too extreme. Another theme is the exploration of different jutsu combinations. The Evil Rinnegan might give Naruto access to new and terrifying jutsu, and fanfictions might explore how he uses these in battles. And sometimes, there's a theme of a hidden agenda. Maybe there's a greater force behind Naruto getting the Evil Rinnegan, and the story unfolds as he discovers this hidden agenda and decides whether to go along with it or fight against it.
If you want the clearest chapter reference, go to Chapter 68. Early on, Jiang Li carried the noodles straight out of the kitchen and came to the...; later, the chapter leans on Uncle had already returned from the fields, and he was sorting through a....
Look to Chapter 102 for the clearest answer. It begins with When the camera cut back, the three of them had already returned to the..., keeps building through The mud on Jiang Yan's body had dried mostly from the wind, and he walked..., and lands on The cameraman, with a blank expression, turned.
Chapter 102 is the strongest chapter-level answer because it starts from When the camera cut back, the three of them had already returned to the... and follows through on The cameraman, with a blank expression, turned off the camera, causing....
The best chapter pointer here is Chapter 86, "If you don't welcome me, why should I stay?". It opens with After over an hour of fuss, it was finally time to eat. and closes on But then her expression became resolute and arrogant..
The best chapter pointer here is Chapter 80, "Princess Wen, Your Lunch is Escaping!". It opens with Jiang Yan and Wen Jiaojiao, one so smug he was almost ascending to the... and closes on arrogant princess with Princess Disease, I'm totally for it, fam.] [Hahaha....
If you want the clearest chapter reference, go to Chapter 99. Early on, Seeing the man approach, one of the individuals with a long scar across...; later, the chapter leans on How is it, have those people outside left?" "They're gone." The man spat....
A practical answer is Chapter 68, because it turns the idea into a concrete scene. The chapter opens with Jiang Li carried the noodles straight out of the kitchen and came to the..., adds pressure through Could it be those two didn't find a place to stay last night and slept..., and ends on But.
If you want the clearest chapter reference, go to Chapter 51. Early on, Oh, okay." After uttering two syllables indifferently, Jiang Li bent down...; later, the chapter leans on By the time she reacted, Jiang Li had already disappeared at the end of....
Chapter 86 is the strongest chapter-level answer because it starts from After over an hour of fuss, it was finally time to eat. and follows through on But then her expression became resolute and arrogant..
A practical answer is Chapter 69, because it turns the idea into a concrete scene. The chapter opens with Since the phones issued by the program team couldn't log into Weibo, Wen..., adds pressure through He knew his charm was undeniable!, and ends on Wen Jiaojiao immediately hugged her arms.