The 2000s are widely regarded as one of the greatest eras in anime history. During this decade, the industry produced many series that not only became global hits but also helped shape modern anime. From action-packed shonen adventures to psychological thrillers, mecha classics, and unforgettable dramas, these shows introduced memorable characters, compelling stories, and timeless themes that continue to resonate with audiences today. These 18 series deserve a place on your watchlist.
1. Fullmetal Alchemist: Brotherhood
Fullmetal Alchemist: Brotherhood is widely considered one of the greatest anime of the 2000s, and its reputation has only grown stronger over time. Adapted faithfully from Hiromu Arakawa’s acclaimed manga, the series follows brothers Edward and Alphonse Elric as they search for the Philosopher’s Stone after a failed attempt to bring their mother back to life through alchemy changes their lives forever.
One of the biggest reasons Brotherhood continues to rank among the best anime ever made is its remarkably consistent storytelling. Across 64 episodes, the series rarely wastes time, with nearly every major event contributing to the larger narrative. Characters introduced early in the story remain important until the finale, and seemingly minor details often become crucial during later arcs.
The anime also excels in character development. Edward and Alphonse grow naturally through their experiences, while supporting characters such as Roy Mustang, Riza Hawkeye, Scar, Winry Rockbell, and Ling Yao receive meaningful storylines that strengthen the narrative. Even the antagonists have believable motivations, making the conflict feel more complex than a simple battle between good and evil.
Studio Bones complements the story with excellent animation, emotional music, and memorable action sequences that continue to impress years after the series ended. More importantly, Brotherhood balances intense battles with heartfelt moments, ensuring that its emotional impact never gets overshadowed by spectacle.
2. Death Note
More than 15 years after its release, Death Note remains one of the most recommended anime for newcomers and longtime fans alike. Based on the bestselling manga by Tsugumi Ohba and Takeshi Obata, the story begins when brilliant high school student Light Yagami discovers a mysterious notebook that allows him to kill anyone simply by writing their name. Believing he can create a perfect world without crime, Light adopts the identity of Kira and soon finds himself locked in an unforgettable battle of intelligence against L.
The series stands out because it relies on psychological tension instead of traditional action. Every confrontation between Light and L feels like a high-stakes chess match, where every word, expression, and decision can change the outcome. Even after multiple viewings, these mind games remain just as gripping because the story comes from its writing rather than surprise alone.
Death Note also raises thought-provoking questions about justice, morality, and the dangers of absolute power. At first, Light appears to be someone with good intentions, but his gradual transformation into a ruthless manipulator is handled with remarkable consistency. Watching his character arc unfold again allows viewers to notice the subtle changes in his personality that foreshadow his eventual downfall.
The anime’s stylish direction, memorable soundtrack, and dramatic presentation have helped it remain relevant for nearly two decades. Iconic scenes featuring Light, L, Ryuk, and the Death Note itself continue to inspire discussions across anime communities and remain instantly recognizable to fans.
3. Code Geass
Code Geass is one of the most ambitious anime released during the 2000s, blending political drama, mecha action, psychological conflict, and personal tragedy into a story that continues to captivate audiences. Produced by Sunrise, the series follows Lelouch Lamperouge, an exiled prince who gains the supernatural power of Geass, allowing him to command anyone to obey his orders.
Although the anime is known for its shocking twists, its greatest strength lies in its characters. Lelouch is neither a traditional hero nor a straightforward villain. His intelligence, determination, and willingness to sacrifice everything for his goals make him one of the most compelling protagonists in anime history. His complicated relationships with Suzaku Kururugi, C.C., and his younger sister Nunnally provide the emotional foundation that keeps the large-scale political conflict grounded in personal stakes.
Another reason Code Geass continues to receive praise is its unpredictable storytelling. Political betrayals, strategic battles, and difficult moral choices keep the narrative engaging from beginning to end. Revisiting the series reveals how many important moments are quietly foreshadowed long before they happen, making repeat viewings especially rewarding.
The anime also features memorable mech battles, a powerful orchestral soundtrack, and striking visual designs that have helped it remain visually appealing despite its age. However, its greatest achievement is that every major event contributes to one of the most celebrated endings in anime history.
4. Monster
Monster is often regarded as one of the finest psychological thriller anime ever created. Adapted from Naoki Urasawa’s award-winning manga, the series follows Dr. Kenzo Tenma, a gifted neurosurgeon whose life changes forever after he chooses to save a young boy. Years later, that decision returns to haunt him when the child grows up to become one of anime’s most terrifying villains. What begins as a moral dilemma gradually unfolds into a gripping story about justice, guilt, and the darkness hidden within human nature.
Monster sets itself apart by grounding its suspense in realistic storytelling rather than supernatural abilities or large-scale action sequences. The series creates tension through carefully written dialogue, deliberate pacing, and deeply layered character relationships. Instead of relying on constant twists, it gradually unfolds its central mystery, rewarding viewers who pay close attention to the smallest details throughout the journey.
The relationship between Dr. Tenma and Johan Liebert is the heart of the story. Tenma represents compassion and hope, while Johan embodies manipulation and destruction. Their conflict raises difficult questions about morality and whether evil is created by circumstance or exists naturally within people.
Monster also features one of the strongest supporting casts in anime. Every character, no matter how briefly they appear, has a purpose that contributes to the larger narrative. Their individual stories create a believable world filled with ordinary people facing extraordinary situations.
5. Tengen Toppa Gurren Lagann
Tengen Toppa Gurren Lagann is one of the most energetic and inspirational anime of the 2000s. Produced by Gainax, the series begins in an underground village where Simon, a quiet young digger, dreams of seeing the world above the surface. Alongside the fearless Kamina, he escapes to a war-torn planet where humanity fights against powerful enemies using giant robots. What starts as a simple adventure gradually grows into an epic story that pushes its characters and its imagination to extraordinary heights.
The anime has remained popular because it combines spectacular action with meaningful character development. Simon’s transformation from a shy and uncertain boy into a confident leader is one of the most satisfying coming-of-age stories in anime. His journey feels natural because every challenge helps him grow stronger emotionally rather than simply making him more powerful.
Kamina is another reason the series has become a fan favorite. His confidence, optimism, and unwavering belief in Simon continue to inspire viewers nearly two decades after the anime first aired. Many of his speeches remain among the most quoted moments in anime history because they encourage courage, determination, and self-belief.
Studio Gainax also delivers unforgettable animation that perfectly matches the anime’s larger-than-life storytelling. Every battle grows bigger than the last, yet the emotional stakes always remain focused on the characters rather than the spectacle itself. The vibrant visuals, powerful soundtrack, and creative mech designs continue to impress even by today’s standards.
6. Ghost in the Shell: Stand Alone Complex
Ghost in the Shell: Stand Alone Complex remains one of the smartest science fiction anime ever produced. Set in a future where cybernetic enhancements are part of everyday life, the series follows Major Motoko Kusanagi and the members of Public Security Section 9 as they investigate cybercrime, terrorism, and political conspiracies. While it delivers plenty of action, the anime is best remembered for exploring complex ideas about technology, identity, artificial intelligence, and the future of society.
One reason the series continues to receive praise is its remarkable relevance. Many of the issues it examines, including digital privacy, cybersecurity, artificial intelligence, and the growing connection between humans and technology, have become increasingly important in today’s world. Watching the series now feels surprisingly timely, proving how far ahead of its time the writing truly was.
Ghost in the Shell: Stand Alone Complex blends self-contained investigations with a larger conspiracy that develops gradually throughout the season. Each episode presents a compelling case while also contributing important pieces to the broader narrative, creating a balance between episodic storytelling and long-term suspense. This format makes the series easy for newcomers to follow while providing the depth and continuity that longtime fans appreciate.
Major Motoko Kusanagi also remains one of anime’s most respected protagonists. Her intelligence, leadership, and thoughtful approach to difficult ethical questions make her a compelling central character whose influence can still be seen in modern science fiction anime.
7. Naruto
Few anime from the 2000s have left a cultural impact as significant as Naruto. Adapted from Masashi Kishimoto’s bestselling manga, the series follows Naruto Uzumaki, a young ninja who dreams of becoming the Hokage despite being feared and rejected by his village. His journey from a lonely outcast to a respected hero has inspired millions of fans worldwide and helped introduce an entire generation to anime.
Naruto became one of the defining titles of the 2000s because it combined exciting action with relatable storytelling. At its heart, the series is about perseverance, friendship, and earning acceptance through determination rather than talent alone. Naruto’s struggles resonate with viewers because his victories feel earned, making his growth one of the most satisfying character arcs in shonen anime.
The series also stands out for its memorable supporting cast. Characters such as Sasuke Uchiha, Sakura Haruno, Kakashi Hatake, Rock Lee, Gaara, and Jiraiya each receive meaningful development that keeps the story engaging beyond its main protagonist. Many fan-favorite arcs focus just as much on these characters as they do on Naruto, giving the world greater depth and emotional weight.
Another reason Naruto continues to hold up is its unforgettable early story arcs. The Land of Waves mission, the Chunin Exams, and the Search for Tsunade remain some of the most celebrated arcs in anime history. They balance emotional storytelling, strategic battles, and strong character moments while introducing themes of sacrifice, rivalry, and redemption that continue throughout the series.
8. Bleach
Bleach played a major role in shaping modern shonen anime and remains one of the defining series of the 2000s. Based on Tite Kubo’s manga, the story follows Ichigo Kurosaki, a teenager who unexpectedly gains the powers of a Soul Reaper and becomes responsible for protecting both the living world and the Soul Society from dangerous supernatural threats.
One of Bleach’s greatest strengths is its distinctive visual identity. From the elegant character designs to the iconic Zanpakuto swords and stylish battle sequences, the series created an aesthetic that continues to influence modern anime and fan art. Many contemporary action series have drawn inspiration from Bleach’s character designs, supernatural abilities, and fast-paced combat.
The Soul Society arc remains one of the biggest reasons the anime continues to receive praise. Widely regarded as one of the best story arcs in shonen history, it introduces unforgettable captains, emotional rivalries, and high-stakes battles while expanding the mythology of the Soul Reapers. Characters such as Rukia Kuchiki, Byakuya Kuchiki, Kenpachi Zaraki, and Toshiro Hitsugaya quickly became fan favorites and remain popular today.
Bleach also deserves recognition for its memorable soundtrack and cinematic action scenes. The anime blends sword combat, supernatural powers, and emotional storytelling into battles that remain exciting even years after their original release. While the series includes filler episodes, its strongest arcs continue to showcase why it became one of the famous Big Three alongside Naruto and One Piece.
9. The Twelve Kingdoms
The Twelve Kingdoms may not have achieved the same mainstream popularity as other anime from the 2000s, but it has earned lasting respect among fantasy fans for its intelligent storytelling and exceptional worldbuilding. Based on Fuyumi Ono’s acclaimed novels, the series follows Youko Nakajima, an ordinary high school student whose life changes when she is transported to a mysterious world made up of twelve kingdoms.
What sets The Twelve Kingdoms apart from many fantasy and isekai anime is its realistic approach to character growth. Youko begins her journey frightened, uncertain, and deeply insecure. Rather than gaining confidence overnight, she gradually develops through hardship, difficult decisions, and personal failures. Her transformation into a capable leader feels believable because every step of her journey is earned.
The anime also excels at building a rich fantasy world filled with political conflict, mythology, and complex social structures. Every kingdom has its own traditions, rulers, and challenges, making the setting feel authentic and fully realized. Instead of focusing only on adventure, the story explores leadership, responsibility, justice, and the consequences of power.
Another reason longtime fans continue recommending the series is its mature storytelling. The Twelve Kingdoms avoids simple solutions and allows its characters to face difficult moral choices that shape both their lives and the world around them. These themes give the anime lasting emotional depth that remains relevant years after its release.
10. Welcome to the N.H.K.
Welcome to the N.H.K. is one of the most honest and emotionally challenging anime released during the 2000s. Based on Tatsuhiko Takimoto’s novel, the series follows Tatsuhiro Sato, a 22-year-old recluse who has withdrawn from society and spends his days isolated in his apartment. His routine changes when he meets a mysterious young woman named Misaki Nakahara, who believes she can help him rebuild his life.
A defining strength of Welcome to the N.H.K. is its grounded portrayal of mental and emotional struggles. Rather than resolving Sato’s difficulties through quick breakthroughs, the series explores the gradual effects of isolation, anxiety, and negative thought patterns on his daily life. This thoughtful and realistic storytelling has helped the anime remain meaningful for many viewers, especially as conversations about mental health have become more open and widely recognized.
The relationship between Sato and Misaki is another reason the series continues to receive praise. Their interactions are often awkward, emotional, and unpredictable, making both characters feel authentic. As their pasts gradually come to light, viewers gain a better understanding of why they struggle to connect with others.
The anime also balances heavy themes with moments of humor and satire. It explores internet culture, conspiracy theories, gaming addiction, and social expectations without losing sight of its emotional core. These lighter moments provide welcome relief while reinforcing the story’s larger message about personal growth and accepting help.
11. Fate/stay night
Fate/stay night introduced many anime fans to one of the industry’s biggest multimedia franchises. Adapted from Kinoko Nasu’s acclaimed visual novel, the series follows high school student Shirou Emiya after he is unexpectedly drawn into the Holy Grail War, a deadly tournament where powerful mages summon legendary heroes from history and mythology to fight for the chance to have their greatest wish granted.
One of the series’ biggest strengths is its fascinating premise. Bringing together historical and mythical figures as heroic spirits created a unique fantasy world that immediately captured viewers’ attention. Characters such as Saber, Archer, Rin Tohsaka, and Gilgamesh quickly became some of the most recognizable names in anime, helping the Fate franchise grow into a global phenomenon.
Beyond its action, Fate/stay night explores themes of heroism, sacrifice, and idealism. Shirou’s desire to save everyone around him often clashes with the harsh reality of war, forcing him to question the beliefs that define his character. These moral conflicts give the story greater emotional depth than a typical battle-focused fantasy series.
The anime also deserves credit for establishing the foundation that later Fate adaptations would build upon. Many of the franchise’s core concepts, relationships, and worldbuilding elements were introduced here, making it an important starting point for viewers interested in exploring the larger Fate universe.
12. Ouran High School Host Club
Ouran High School Host Club remains one of the most beloved romantic comedy anime of the 2000s because of its clever humor, memorable characters, and timeless charm. Based on Bisco Hatori’s popular manga, the series follows Haruhi Fujioka, a hardworking scholarship student who accidentally breaks an expensive vase belonging to her school’s elite Host Club.
The anime stands out because it playfully challenges common romance and shoujo stereotypes instead of simply following them. Each member of the Host Club represents a familiar character archetype, but the series constantly pokes fun at these conventions while giving every character genuine emotional depth. This self-aware approach keeps the comedy fresh even years after its original release.
Haruhi is another major reason the series has remained so popular. Rather than relying on traditional romantic clichés, she is practical, intelligent, and refreshingly independent. Her honest personality creates natural chemistry with the rest of the cast, allowing the relationships to develop believably and entertainingly.
Beyond its comedy, Ouran High School Host Club explores themes of friendship, identity, family expectations, and personal growth. Characters such as Tamaki Suoh, Kyoya Ootori, and the Hitachiin twins all receive meaningful development that adds emotional weight to the story without sacrificing its lighthearted tone.
13. The Melancholy of Haruhi Suzumiya
The Melancholy of Haruhi Suzumiya was one of the most influential anime of the 2000s, helping redefine how light novel adaptations were viewed both in Japan and internationally. Based on Nagaru Tanigawa’s bestselling novels, the series follows Kyon, an ordinary high school student whose life changes after meeting the eccentric Haruhi Suzumiya.
What made the anime stand out was its unconventional storytelling. Instead of presenting events in chronological order during its original broadcast, the series challenged viewers to piece together the narrative themselves. This creative approach sparked widespread discussion among anime fans and made Haruhi one of the most talked-about series of its generation. Even today, it remains a fascinating example of experimental storytelling in mainstream anime.
Beyond its unique structure, the series succeeds because of its memorable characters. Haruhi’s unpredictable personality constantly pushes the story in unexpected directions, while Kyon’s sarcastic narration provides a grounded perspective that balances the supernatural events unfolding around him. Supporting characters such as Yuki Nagato, Mikuru Asahina, and Itsuki Koizumi each bring their own mysteries, adding depth to the narrative.
The anime also explores themes of boredom, curiosity, and the desire for something extraordinary in everyday life. These universal ideas continue to resonate with viewers, making the story feel relevant despite the years that have passed since its release.
14. Toradora!
Toradora! is widely regarded as one of the greatest romantic comedy anime ever made. Adapted from Yuyuko Tokemiya’s popular light novel series, the story follows Ryuuji Takasu, a kind-hearted student with an intimidating appearance, and Taiga Aisaka, a small but fiercely independent girl known for her short temper. Although they initially work together to help each other pursue different crushes, their unexpected partnership gradually develops into one of anime’s most memorable love stories.
Instead of depending on familiar romantic clichés, Toradora! tells a story shaped by gradual emotional development and well-written characters. The relationships change naturally as the characters confront their insecurities, ambitions, and feelings over time. Ryuuji and Taiga’s bond grows through shared experiences, resulting in a romance that feels believable, heartfelt, and emotionally engaging.
The supporting cast also plays a significant role in the story’s success. Characters such as Minori Kushieda, Yusaku Kitamura, and Ami Kawashima are far more than secondary love interests. Each has personal struggles and emotional conflicts that add depth to the narrative, making every relationship feel believable and interconnected.
Toradora! balances comedy with heartfelt drama exceptionally well. Lighthearted moments create plenty of laughs, but the series never loses sight of its emotional core. Themes of family, friendship, self-acceptance, and growing up are explored with maturity, giving the story lasting appeal for audiences of all ages.
15. Baccano!
Baccano! is one of the most unique anime of the 2000s, earning praise for its fast-paced storytelling, unforgettable cast, and creative narrative structure. Based on Ryohgo Narita’s light novels, the series takes place across multiple timelines during the early 1930s, bringing together gangsters, thieves, assassins, alchemists, and immortals in a thrilling story filled with mystery, action, and dark humor. Rather than following a single protagonist, the anime connects dozens of characters whose lives intersect in surprising ways.
One of Baccano!’s greatest strengths is its nonlinear storytelling. The series moves between different years and locations, gradually revealing how each event fits into the larger picture. While this approach may seem confusing at first, every episode rewards careful attention, making the experience incredibly satisfying once the full story comes together.
The anime also features one of the strongest ensemble casts in anime. Characters such as Isaac Dian and Miria Harvent quickly became fan favorites because of their infectious energy and comedic chemistry, while more serious figures like Claire Stanfield and Ladd Russo add tension and unpredictability to the narrative. Every character feels important, and each contributes to the story in meaningful ways.
Studio Brain’s Base enhances the experience with stylish animation, energetic direction, and a memorable jazz-inspired soundtrack that perfectly captures the atmosphere of Prohibition-era America. The combination of action, comedy, suspense, and supernatural elements gives Baccano! a distinct identity that still feels fresh today.
16. Black Lagoon
Black Lagoon remains one of the most distinctive action anime of the 2000s thanks to its gritty storytelling, morally complex characters, and cinematic gunfights. Adapted from Rei Hiroe’s manga, the series follows Rokuro “Rock” Okajima, an ordinary Japanese businessman whose life changes dramatically after he is kidnapped by a group of mercenaries known as the Lagoon Company.
One of Black Lagoon’s defining strengths is its morally complex storytelling. The series follows mercenaries, smugglers, and crime syndicates in a lawless world where survival often outweighs justice. Rather than dividing characters into clear heroes and villains, it presents conflicting motives and difficult choices that challenge viewers’ perspectives. This grounded, realistic approach gives the anime a gritty atmosphere that continues to distinguish it from many action series.
The characters are another reason Black Lagoon has remained so popular. Revy, the Lagoon Company’s fearless gunslinger, has become one of anime’s most iconic female protagonists. Her explosive personality, tragic past, and complicated relationship with Rock create much of the emotional tension throughout the series. Rock himself undergoes significant development as he slowly adapts to a world that constantly challenges his beliefs and values.
Studio Madhouse delivers stylish animation, intense shootouts, and memorable action sequences that still hold up today. Combined with sharp dialogue and excellent pacing, every episode keeps viewers engaged while exploring themes of identity, survival, and corruption.
17. Soul Eater
Soul Eater quickly became one of the most recognizable anime of the late 2000s thanks to its imaginative world, memorable characters, and distinctive visual style. Based on Atsushi Ohkubo’s manga, the series takes place at the Death Weapon Meister Academy, where students train to become powerful warriors by partnering with human weapons. At the center of the story are Maka Albarn and Soul Eater Evans, a determined duo working toward the goal of creating a Death Scythe capable of serving the Grim Reaper himself.
One of the anime’s biggest strengths is its creative setting. The Halloween-inspired world is filled with living weapons, witches, monsters, and supernatural creatures, giving the series a unique identity that still feels fresh years after its release. Every location reflects the anime’s gothic aesthetic, making Soul Eater instantly recognizable among other shonen titles from the same era.
The series also succeeds because of its memorable cast. Maka’s determination, Soul’s laid-back confidence, Black Star’s endless ambition, and Death the Kid’s obsession with symmetry all contribute to the anime’s entertaining mix of action and comedy. Their friendships grow naturally throughout the story, creating emotional moments that balance the high-energy battles.
Studio Bones complements the story with expressive animation, creative fight choreography, and a striking visual style that captures the manga’s distinctive artwork. The energetic soundtrack and memorable opening themes further enhance the experience, helping Soul Eater leave a lasting impression on viewers.
