Sherlock Holmes. He is extremely intelligent, with his remarkable powers of deduction. He can observe the tiniest details and use them to solve the most complex mysteries. His mind is like a well - oiled machine, constantly analyzing and making connections that others miss.
I think it's debatable. Rick has genius-level intelligence in science and technology, but his decision-making and interpersonal skills might not always show the highest level of wisdom.
One of the best features could be its unique plot twists. It might take the original Naruto universe and add unexpected turns that keep readers on their toes.
A character's intelligence in fiction can be measured by their knowledge base. Professor X from the X - Men has extensive knowledge of genetics, mutants, and telepathy. He uses this knowledge to lead the X - Men and protect mutants. Also, adaptability is important. A smart character like Katniss Everdeen in 'The Hunger Games' can quickly adapt to the changing and dangerous situations in the arena, using her wits and survival skills, which also indicates her intelligence.
Reed Richards (Mr. Fantastic) is often considered one of the smartest. His scientific and strategic brilliance help the Fantastic Four overcome many challenges.
It's a matter of perspective. Some might argue there are other characters just as smart or even smarter. But Rick's brilliance in creating and manipulating technology gives him a strong case for being the smartest.
In my opinion, Reed Richards (Mr. Fantastic) from the Fantastic Four is considered one of the smartest. His scientific and intellectual prowess allow him to solve complex problems and invent amazing technologies.
Sasuke could also be a really engaging character. Maybe in the fanfiction, he has a different path or a new motivation that makes his story more captivating. For example, he could be involved in some sort of mystery related to his clan that wasn't explored in the original. And his interactions with other characters would be different too, adding more depth to his character.