Pokemon: Spiritual Master - Chapter 2: Professor Cozmo

Throughout this current life of mine, I will pay no attention to my past lives, nor will I seek future lives. I wish to live vigorously, to pay back debt of gratitude and fulfill duty to avenge, to defeat valiant heroes from all species, and to proudly laugh at all the Gods and Demons of the Six Path of Reincarnation!

- Description from Novelupdates

Kitazawa’s grades at the Ninja Academy had always been mediocre.Uchiha Itachi graduated at seven; he barely scraped through at thirteen.Uzumaki Naruto became the savior of the ninja world at seventeen; at that same age, Kitazawa was still struggling to make Chunin.In this harsh world of shinobi, Kitazawa was what people called a fodder ninja: no talent, no bloodline, and no backing.To stay alive until the story’s grand finale, he’d chosen the safest path—teaching at the Ninja Academy, a job he’d held for five years.“Another peaceful day in Konoha.”Kitazawa rose from his seat and walked to the window.It was enrollment day again, and the training grounds were buzzing with life.He glanced down at the stack of new student files in his hands. Names leapt out at him, all too familiar:Uzumaki Naruto, Uchiha Sasuke, Hyuga Hinata, Ino Yamanaka, Sakura Haruno, Akimichi Choji, Nara Shikamaru, Inuzuka Kiba… and more.'DING''Host has reached age six and successfully enrolled in the Ninja Academy.''Activating the Strongest Shinobi System.'

Fate, a gatekeeper who had been working for the castle, is beset by a few burdens.

Kyo Mazuru traveled to the world of Bleach and landed in the forest of Menos Grande at the beginning.Picking up a asauchi left over from Shinigami's death, and starting with a sword, he spent hundred years in the forest of Menos Grande to survive, slashing countless hollows, and his slashing skills reached the peak, until one day, he met a man who claimed to be Mr. Aizen Sōsuke!Mr. Aizen couldn't bear him to live alone in Hueco Mundo, so he invited him out of there and brought him to Soul Society!After that, Kyo Mazuru's Shinigami career began!