Well, it could start with a portal opening between the two worlds. Then characters from both sides start to interact. The Naruto characters would be shocked by the Needless' powers, like their extreme physical abilities and unique powers. And the Needless might be intrigued by the chakra system in the Naruto world.
A crossover could also explore the cultural differences between the two worlds. The Naruto world has its own values based on honor, loyalty, and hard work in training. The Needless world might have a more survival - of - the - fittest kind of culture. Seeing how the characters from both worlds adapt to each other's cultures while fighting a common enemy could be a really interesting aspect of the fanfiction.
A crossover could work by having a common enemy. Let's say there is an entity that wants to take over both universes. Naruto and Agent Venom would meet while investigating this threat. They would find that their powers complement each other. Naruto's ability to create multiple clones could be used as a distraction while Agent Venom sneaks up on the enemy. Agent Venom's resistance to physical damage could also protect Naruto in dangerous situations. Their relationship could start off rocky due to differences in their personalities and fighting styles, but they would gradually learn to work together as they face greater challenges.
A crossover could work by having a portal or some sort of magic that links the two universes. Byakuya would bring his unique abilities like his Shunpo (flash step) and his Senbonzakura sword. Naruto could show Byakuya the power of friendship and teamwork which are so central to the Naruto series.
In this kind of fanfiction, the Transformers could also bring new elements to Naruto's world. Their advanced technology could be something that the ninja villages are either in awe of or try to study. The Autobots could potentially form an alliance with the ninja, teaching them about their technology in exchange for help in their fight against the Decepticons. Naruto, being Godlike, could be the key figure in bridging the two worlds together, using his unique abilities to communicate and work with both the ninja and the Transformers.
In a Naruto and Hachishakusama crossover fanfiction, it could work by having the two different mythologies or concepts collide. For instance, the chakra system in Naruto could interact with the dark and mysterious powers of Hachishakusama. Maybe Naruto's positive chakra could have an effect on Hachishakusama's negative and spooky essence.
Well, one way it could work is by having the ninjas from Naruto interact with the Sith Lords in the Star Wars Empire. Maybe Naruto's chakra could be seen as a sort of Force equivalent. For example, the Sharingan could be compared to a Sith's ability to sense and manipulate the Force. The political intrigue in the Star Wars Empire could also be mirrored in the hidden villages of Naruto. It would be really interesting to see how characters like Naruto and Darth Vader would interact, given their very different moral compasses.
In a Naruto and fem Goku crossover fanfiction, it could work by having a common threat that brings them together. For instance, an ancient evil that has the power to destroy both the ninja world and the Dragon Ball universe. They would then combine their unique powers and strategies. Naruto with his shadow clones and jutsu, and fem Goku with her Super Saiyan forms and energy blasts.
Well, it could work by having the different power systems interact. For instance, the chakra in Naruto's world and the gem magic in Steven Universe. The Juubi's power is so immense that it could disrupt the balance in the Steven Universe. Naruto, being a powerful ninja, could teach the characters in Steven Universe about combat techniques that are different from their own. And the gems could introduce Naruto and his friends to new forms of energy manipulation.
The power scaling would need to take into account the different growth mechanics of both universes. In Naruto, characters can grow by learning new jutsu, improving their chakra reserves, and achieving new forms like the Tailed Beast Mode. In DBZ, it's mainly about training to increase ki and achieving new Super Saiyan forms. A crossover might have to create a new system that combines these elements. For instance, a character could train to increase both their chakra and ki simultaneously, and new power - up forms could be based on a combination of Naruto and DBZ concepts.
Well, Naruto's ninja skills could be really interesting in the Teen Titans' universe. He could teach the Titans some new combat moves. And the kitten, maybe it could be like a new sidekick or a mysterious creature that brings some unique power. For example, it could have the ability to sense danger like Naruto's sixth sense.
In a crossover fanfiction, the settings could merge. For example, Camp Half - Blood could be visited by Naruto. The demigods would be intrigued by his chakra abilities, which are so different from their own powers based on the Greek gods. Naruto could teach them some of his ninja skills in return for learning about their combat techniques. And perhaps the Juubi's presence could disrupt the natural balance of the Percy Jackson world, leading to new and unexpected adventures for both Naruto and the demigods.