Pokemon: A Gym Leader's Rise(SI)

Kon D. Ryūkami belongs to the race of benders in the world of pirates. He wants to make tons of friends, travel the whole world, meet all the races in the world, and spar with strong people.  The benders had been hunted by the rulers of the world eight hundred years ago, so the benders decided to stay out of the world's affairs and lived on the flying island of Skyloft. Kon left for his journey in the world below when his parents and teacher thought that he was strong enough to adventure the world. They were worried for his safety, and they knew that if the World Government knew that he was the Avatar, they would stop at nothing to hunt him down. But to their surprise, Kon was a genius at bending who had mastered all four basic bending styles before he was fifteen. With his iron staff and a four-armed monkey, Goku, on his shoulders, he started his journey. --- MC would join the Strawhat Pirates --- He would be a part of their journey --- He would not be a sidekick to Luffy --- He is strong but not endgame strong --- No harem --- It's not a Chinese translation, it's original! --- You don't need to know about the story of Avatar to enjoy it!

As Itachi Uchiha witnessed the death of his closest friend, Shisui, the overwhelming grief awakened his Mangekyō Sharingan. But that was not the end. Unable to bear the crushing pain, his mind was trapped within a genjutsu by Shisui's Mangekyō. At that very moment, a genius from Earth met his own death and found himself reincarnated inside Itachi's body. After breaking the genjutsu imprisoning Itachi's consciousness, the two shared each other's memories, gaining complete understanding of one another's lives. Realizing the newcomer possessed the resolve and intellect to change fate, Itachi willingly entrusted him with his body, choosing to remain as a silent observer within his own mind. Thus, a new Itachi Uchiha was born: one who retained Itachi's body, talent, skills and possessed a mind even more brilliant and far more dangerous than the original. - No Harem - MC has only watched Naruto, not Shippuden - Original story, not a translation - From Strong to Overpowered