6 Childhood Anime That Are Now Old Enough to Be Considered ‘Retro’

What counts as “retro anime” changes over time, because “retro” depends on the current decade. Anime from the 1960s was considered retro in the 1990s, and by the 2010s, anime from the 1990s had reached that status. Today, in the mid-2020s, many anime fans fondly remember the 2000s as a golden age, enjoying both rewatching shows from that era and discovering them anew. This nostalgia is especially strong among Millennial fans, though some older members of Gen Z feel the same way about the anime of the 2000s.

It can be a little strange for longtime anime fans to revisit shows they loved as kids or teens and realize they now feel like classics from the past, especially with so many exciting new anime like Jujutsu Kaisen and Gachiakuta being popular today. However, becoming a classic is something to be proud of! It means these older anime were truly the best of their era, and they deserve to be remembered and appreciated, even if they don’t feel as brand new anymore.

D.Gray-Man is a Forgotten Gem of the 2000s

Fans of Demon Slayer and Jujutsu Kaisen Ought to Check Out D.Gray-Man

Anime featuring young heroes battling monsters using unique weapons is incredibly popular right now, with shows like Demon Slayer and Jujutsu Kaisen leading the way. While many people know titles like Tokyo Ghoul, Chainsaw Man, and Fire Force, there’s one series that often gets overlooked: D.Gray-Man.

Despite its potential, D.Gray-Man faced numerous delays and challenges, preventing it from achieving the massive popularity of series like Bleach and Naruto. As a result, many newer anime fans may not be familiar with it. That’s unfortunate, because this unfinished anime is a compelling Gothic fantasy with interesting characters, exciting battles, and surprising twists. While older fans might vaguely remember it as being similar to those popular shonen series, it’s definitely worth revisiting, even if you’re not feeling nostalgic.

Bleach May Have Gotten Canceled, But is Still a Childhood Classic

Filler Aside, the Original Bleach Anime Holds Up Well Today

Lately, everyone’s been buzzing about the Bleach: Thousand-Year Blood War anime, thanks to its fast-paced story, impactful plot, and amazing animation. While this feels like a fantastic revival of Bleach, the original series remains memorable. Despite some issues like unnecessary filler episodes and older animation styles, the classic Bleach has aged surprisingly well and is now considered a retro favorite.

Fans who grew up with the original Bleach will likely look past its flaws when revisiting it, especially remembering popular arcs like the Soul Society and Arrancar sagas. New viewers can also enjoy the original anime to understand the roots of Bleach: Thousand-Year Blood War. At the very least, the Soul Society arc is essential viewing to remember why Bleach is considered a classic.

Gurren Lagann Still Has a Place in the Mecha Anime Genre

Science Fiction Needed an Anime Like Gurren Lagann

Many science fiction anime series, like Cowboy Bebop, Trigun, and Neon Genesis Evangelion, have become classics, especially those from the 1990s. While those shows are now considered retro, fans are starting to see Gurren Lagann in the same light. Although it doesn’t seem that long ago for those who remember it fondly, Gurren Lagann originally aired in 2008 – over 18 years ago!

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Even years after its release, Gurren Lagann remains a standout achievement for studio Gainax. What sets it apart is its unique ability to both playfully parody and sincerely celebrate the mecha genre. Few anime can strike that delicate balance, but Gurren Lagann does so effortlessly. Its vibrant, cartoonish animation still looks fantastic, and its themes of bravery and freedom feel incredibly relevant today.

Death Note Won’t Soon Be Forgotten as a Thought-Provoking Shonen Tale

Death Note Aged Well in Almost Every Way

Few anime challenge the typical shonen formula like Death Note. While even grimmer anime have emerged since, including those in the “dark trio,” Death Note takes risks that Chainsaw Man and Jujutsu Kaisen avoid. It prioritizes a clever, suspenseful crime thriller over action, focusing on intellect and questioning what true justice means.

Originally published in 2003, the Death Note manga is now considered a classic, being nearly as old as the most popular series from Shonen Jump at the time. The anime adaptation, released just three years later, also earns that retro label, and rightfully so. Even after two decades, Death Note remains a beloved animated series, famous for making audiences question the true meaning of good and evil, especially when someone is taking the law into their own hands.

Yu-Gi-Oh! Was the King of Games in the Good Old Days

Playing Yu-Gi-Oh! Was More Fun Back Then, Too

Many anime series use sports as a setting for competition and rules, and anime based on games, like Kakegurui and Yu-Gi-Oh!, follow a similar pattern. Yu-Gi-Oh! is the older, more well-known classic, while Kakegurui is newer and hasn’t reached the same level of popularity, making Yu-Gi-Oh! more likely to evoke feelings of nostalgia. Yu-Gi-Oh! was hugely popular in its time, attracting a lot of young Millennials and introducing them to anime, much like Dragon Ball did.

While Yu-Gi-Oh! remains popular in both anime and card game form today, it doesn’t feel quite as rooted in the past as shows like Death Note and Gurren Lagann. Still, many people fondly remember the original series, when characters like Maximilian Pegasus and Seto Kaiba were the main threats, and the Blue-Eyes Ultimate Dragon seemed incredibly powerful. Some would argue the card game itself was more fun back then, with less overwhelming card effects and a slower, more strategic pace compared to how it’s played now.

Naruto Had a Proud Place Among Shonen’s Big Three in the 2000s

Nostalgic Anime Fans Don’t Need Boruto to Relive the Classic Ninja Days

Similar to Bleach, the Naruto anime remains popular, and its sequel, Boruto, is comparable to Bleach: Thousand-Year Blood War. While Boruto has received mixed reviews, most longtime anime fans consider the original Naruto a classic from the 2000s.

For many Millennials and older Gen Z fans, the original Naruto anime was a defining part of their childhoods – a vibrant and exciting story about resourceful ninjas and their unwavering determination. While it’s starting to feel nostalgic now and shows some signs of age, Naruto remains a classic and influential shonen anime.

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2026-03-25 23:38