A great narrative arc needs more than just an interesting plot and captivating action. While these are both appreciated, the best arc shounen anime also feature exquisite writing that takes the cast into uncharted territory. All great shounen sagas are packed full of intense fights and brutal takedowns, but they also feature incredible moments of victory, tragedy, redemption, and deceit. It's these terrific ingredients that make them the best shounen anime ever made. After all, who wants to read the same old boring thing?
Out of all the storylines in Hunter X Hunter, the "Chimera Ant Arc" is the darkest, but also the most emotionally satisfying. It tackles heavy topics like life, death, and nuclear war, and makes viewers question if humanity has earned the right to survive on Earth.
The story's main antagonist, Meruem, King of the Chimera Ants, begins to question his cruel, pessimistic outlook on life as he befriends a human girl named Komugi. Their relationship sets the mournful tone of the saga, right down to their tearful demise. It's an emotional story arc that pushes the heroes into situations they've never been exposed to before.
Rurouni Kenshin repeatedly asks viewers to consider whether or not someone can truly move on from their horrific past. While Kenshin Himura was given another chance at life, the same cannot be said for Shishio Makoto, who was burned alive by his comrades at the Meiji government. "The Kyoto Arc" moves the story in a darker, politically-driven direction, as Shishio's plot for revenge against the Meiji government reveals the cruelty of war and the gruesome effects it can have on everyone involved.
Fan-favorite characters such as Saitō Hajime and Misao Makimachi are introduced in the storyline, while series regulars like Sagara Sanosuke and Kamiya Kaoru are explored with greater depth. Most importantly, Kenshin manages to invalidate Shishio's mantra of survival of the fittest by proving there's no point in surviving if you have nothing to live for.
Even after he comes back from the dead, Yusuke Urameshi of Yu Yu Hakusho is still a smart-ass kid. However, in the "Dark Tournament Saga," Yusuke takes his first steps towards maturity, as he's forced to enter an underground tournament filled with vicious killers. If he refuses to participate, his arch nemesis Toguro will kill everyone he loves in a matter of seconds.
Toguro pushes Yusuke to his breaking point, as he dreams of dying in battle, and Yusuke's struggle to match Toguro's power is heart-wrenching. He endures excruciating physical torment to inheret Genkai's spirit energy, but it's still not enough to get the job done. It takes the death of Genkai — one of the most important mentors in Yusuke's life — and a brilliant fake out by Kazuma Kuwabara to motivate Yusuke to unlock his inner strength and defeat Toguro once and for all.
The "Soul Society Arc" expands upon the lore underpinning the fascinating spirit world of Bleach. Rukia Kuchiki is captured and sentenced to execution by her former comrades, which offers an in-depth look at the politics that govern the afterlife. At the same time, the incident gives Ichigo Kurosaki and friends a new opportunity to develop their powers, which is always fun to watch.
This story arc raises the stakes of the series, and does so without throwing in an overpowered enemy who seems undefeatable by the show's previous standards. Instead, it offers a rich narrative filled with twists and turns, as the true mastermind behind Rukia's execution is one of the smartest anime villains of all time.