The story could start with Frieza arriving in the Naruto universe for some reason, maybe in search of new planets to conquer. Naruto, being the protector of his village, steps up to fight him. Naruto's chakra and Frieza's ki could be interesting to compare. Naruto's ability to sense danger and his quick reflexes would be put to the test against Frieza's speed and power. And perhaps in the end, Naruto could use the power of friendship and the will of his comrades to defeat Frieza, just like he always does in his own universe.
In this fanfiction, Naruto may initially struggle against Frieza's overwhelming power. Frieza could start by showing off his strength, easily destroying parts of the landscape. But Naruto, being the determined shinobi he is, would start to analyze Frieza's fighting style. He might notice patterns in Frieza's attacks and use his own ninja skills like substitution jutsu to dodge. As the fight progresses, Naruto could tap into his sage mode or even his new forms if the story takes place later in the Naruto timeline. He would then be able to match Frieza's power more evenly and ultimately find a way to defeat him, perhaps by using a combination of his ninjutsu and his strong spirit.
One possible storyline could be about Frieza's transformation in character due to impending fatherhood. He might start to question his evil ways and think about creating a better future for his unborn child and his wife. For example, he could try to make peace with some of his enemies for the sake of his family.
Well, it could be about a character in the Naruto universe who discovers they have some sort of connection to Frieza. Maybe they inherit his power and have to struggle with how to use it in a world that doesn't understand such alien abilities. They might face discrimination or fear from others in the shinobi world.
It might be Naruto's long - lost relative. This would add an interesting twist as Naruto is already a very powerful and well - known character. His relative having Frieza - like powers would create a lot of drama and new storylines. For example, Naruto might have to help this relative control their powers or deal with the consequences of having such a unique heritage.
Well, one way it could work is if Naruto somehow enters the Dragon Ball universe. Naruto's skills like his shadow clones could be interestingly pitted against Frieza's power. Maybe Naruto would be initially in awe of Frieza's strength but then find ways to outwit him using his ninja tactics.
Well, Naruto's skills and determination combined with Frieza's power would be really interesting. Maybe he would use his ninja skills in a new way in the Dragon Ball universe. For example, he could use shadow clones to outwit his opponents during battles, which is a very Naruto - like tactic.
One possible plot could be that Naruto is somehow transported to a different timeline where he has to fight the Hokage for a misunderstanding. Maybe there's a villain who has manipulated events to make the Hokage think Naruto is a threat. So Naruto has to fight not only to prove his innocence but also to save the village from the real danger that the villain poses.
In a 'naruto fights alone fanfiction', it could be that Naruto is on a mission in a foreign land where he has no support. The local ninjas are all against him for some reason. He has to use his Nine - Tails chakra in a more discreet way as he can't afford to go all - out and draw too much attention. He might befriend some local animals or spirits who help him in a more indirect way, like giving him information about the enemies' weaknesses.
Well, one possibility could be that Naruto uses his shadow clone jutsu to confuse the Humunculi. Since they are used to a more straightforward combat style, the clones might throw them off. Naruto could then use his Rasengan to directly attack them. Maybe he would also team up with some of the characters from the FMA world who oppose the Humunculi.
One possible plot could be that Zeref has a new target in the Naruto universe. Naruto discovers this and decides to confront him. At first, Naruto is outmatched as he doesn't understand Zeref's magic. But then he starts to analyze it during their battles and figures out ways to counter it. Meanwhile, Zeref is intrigued by Naruto's never - say - die attitude and chakra. The plot could also involve other characters from both universes getting involved, either to help or to cause more chaos.
Well, the plot could involve Naruto being in a post - apocalyptic world filled with zombies. His ninja skills would be put to the extreme test. He could team up with his friends like Sasuke and Sakura. Naruto would have to adapt his fighting style as zombies don't feel pain like normal foes. He might use his speed and agility to dodge the zombies and then use his powerful ninjutsu to take them out in groups.