Perhaps Naruto makes the robot as a tool to help around the village. It could assist in construction, or in taking care of the elderly and the young. Since Naruto is always looking out for the well - being of his village, a robot could be a great addition.
The plot might involve Naruto making the robot to replace himself when he's away on long - term missions. The robot would look like him and act like him, but it would have some glitches at first. These glitches could lead to some comical situations in the village, like the robot accidentally using a powerful jutsu in the middle of the market. As the story progresses, Naruto works to fix the glitches and make the robot a reliable substitute.
Perhaps it's for exploration. Naruto is always curious about the world outside. The robots can be sent to explore dangerous or uncharted areas where it might be too risky for humans to go. They can collect information and report back to Naruto.
Maybe Naruto has some knowledge from an unexpected source. For example, he could have met a wandering inventor who taught him the basics of robotics. With his determination and quick learning ability, he then starts building the robot army. He might also use his chakra in some unique way to power or control the robots.
No, it is not ethical. Naruto is a popular and often beloved character in the anime world, especially among younger audiences. Creating such inappropriate fanfiction goes against the spirit of the original work which is mainly about friendship, growth, and ninja adventures. It also involves creating non - consensual and inappropriate scenarios for a character which is unacceptable.
One possibility is that Naruto's transformation into a robot could change his relationships. His friends might be initially shocked and have to learn to trust this new robotic version of him. He could also face new enemies who are specifically targeting him because of his unique robotic - ninja nature. His sensei might have to train him in different ways to make use of his robotic abilities, like teaching him how to maintain and upgrade his robotic parts.
The plot could involve a princess - like robot from another dimension coming to the Naruto world. She might be made of bubblegum - like material which gives her unique abilities. She could team up with Naruto and his friends to fight against a common enemy, perhaps using her bubblegum powers to trap foes or her robotic strength to overpower them.
I'm not sure if there are many specific fanfics with exactly this combination. You could try searching on popular fanfic websites like FanFiction.net or Archive of Our Own. Just type in the relevant keywords and see what comes up.
Some great topics would be Naruto's exploration of new jutsus. He could be on a journey to discover ancient ninja techniques that have been lost. Or, the story could focus on his family life, like how he raises his children to be strong and kind - hearted ninjas. Team - building adventures with his old friends and new comrades are also good topics.
They could interact through a control panel. For example, the scientists or owners can input commands and settings into the panel to guide the breeding process of the robot.
He might become more logical. Since robots are often programmed with certain algorithms, Naruto could start to think more in terms of cause and effect rather than just his usual impulsive ninja instincts.