One great 'Naruto Momoshiki Otsutsuki fanfiction' is 'The Otsutsuki's Ascent'. It delves deep into Momoshiki's backstory and his interactions with the Naruto universe in a really interesting way.
Power is a common theme. Since Momoshiki is such a powerful character, many fanfictions explore how his power affects the Naruto world and the characters in it.
The unexpected ally might be a character from a different village, like Gaara from the Sand Village. Gaara has a deep respect for Naruto and has changed his ways after his encounter with Naruto. In this fanfiction, Gaara could come to the aid of the Hidden Leaf Village because he believes that the safety of all villages is interconnected. His unique sand - based powers would add a different dimension to the fight to save the Hidden Leaf Village.
Hinata saving Naruto from Pain in fanfiction can take on many forms. It could be that Hinata has been secretly training and has a new set of abilities that she unleashes to save Naruto. This not only changes the course of the battle but also the dynamics between the characters. Fanfic writers might also add some emotional elements, such as Hinata's inner thoughts and feelings during the rescue. This makes the story more engaging and gives readers a fresh perspective on the Naruto - Hinata relationship.
One idea could be that Naruto uses his shadow clones to create a distraction while he sneaks in to save Konan. He could use his Rasengan to take out Hanzo's guards quickly.
Shikamaru might be involved. He's very intelligent and could come up with a clever plan to outmaneuver the Akatsuki. His shadow - binding jutsu could also be used to immobilize some of the Akatsuki members.
Perhaps in this fanfiction, Naruto has some sort of special power or transformation that he unlocks just in time to face Orochimaru. It could be related to his Nine - Tails chakra in a new and unique way. He uses this power to break through Orochimaru's defenses and save Hiruzen. Naruto might also use his knowledge of Orochimaru's weaknesses that he has learned either from Jiraiya or from his own past encounters with Orochimaru's minions.
One common plot is that Hinata arrives at the crucial moment when Naruto is about to be defeated by Pain. She uses her Byakugan in a new and unexpected way to counter Pain's attacks. For example, she might be able to see a weakness in Pain's jutsu that no one else could.
It was a normal day at the ninja school until Sakura found herself surrounded by bullies near the training grounds. They were making fun of her skills and her friendship with Naruto. As the situation was getting worse, Naruto, who had been practicing his stealth skills, quietly approached. He suddenly jumped in between Sakura and the bullies. 'You think you're so tough? Well, you're not!' Naruto said defiantly. The bullies laughed, but Naruto quickly used a simple but effective ninja trick to make them trip and fall. They got up, embarrassed and angry, but seeing Naruto's determination, they decided to leave, and Sakura hugged Naruto tightly, thanking him for saving her.