10 '90s and 2000s Anime Series Too Strange to Last

10 anime series from the 1990s and 2000s that defy logic and still confuse viewers.

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Oct 10, 2026

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10 '90s and 2000s Anime Series Too Strange to Last

10 anime series from the 1990s and 2000s that defy logic and still confuse viewers.

In brief

10 anime series from the 1990s and 2000s that defy logic and still confuse viewers. 10 anime series from the 1990s and 2000s that defy logic and still confuse viewers. Originally reported by CBR.

Blue Submarine No. 6

Aquatic creatures swim underwater in Blue Submarine No. 6.

Blue Submarine No. 6 aired in 1998 with underwater worlds mixing 2d animation and early cgi.

“Blue Submarine No. 6 aired in 1998 and stands out as its underwater world mixes traditional 2d animation with early cgi”

Key the Metal Idol

Lain Iwakura in the Wired in Serial Experiments Lain.

Key the Metal Idol follows a robot girl who believes she can become human with 30,000 friends.

“Key the Metal Idol introduces the robot girl Key, who believes she can become human if she makes 30,000 friends”

Serial Experiments Lain

Aquatic creatures swim underwater in Blue Submarine No. 6.

Serial Experiments Lain explores identity, technology, and reality through a teenager's online network.

“1998's Serial Experiments Lain transforms the simple idea of a teenager getting involved in an online network into questions about identity, consciousness, technology and reality”

Paranoia Agent

No. 6 fleet ship advances in Blue Submarine No. 6.

Paranoia Agent shifts between crime stories and psychological nightmares with sudden rule changes.

“Paranoia Agent begins with a simple mystery involving Little Slugger, but Satoshi Kon quickly turns that into something much harder to classify”

The Tatami Galaxy

An aquatic mutant attacks in Blue Submarine No. 6.

The Tatami Galaxy features a university student imagining alternate life paths through rapid storytelling.

“Technically, The Tatami Galaxy arrived in 2010 just outside the 2000s period, but its experimental style fits naturally beside the stranger animation of the previous decade”

Excel Saga

Excel Saga mixes science fiction, horror, action, and romance in each episode with chaotic energy.

“Excel Saga features Excel, a hyperactive woman whose devotion to Il Palazzo defines her ridiculous attempts at conquering the world”

FLCL

FLCL uses visual jokes and sudden style changes to explore growing up and family problems.

“FLCL has everything, be it guards, robots, aliens, medical machinery, a Vespa-riding woman and a boy whose forehead becomes unusually important”

Dead Leaves

Dead Leaves

Dead Leaves wastes almost no time explaining itself with violent adventures and exaggerated characters.

“Dead Leaves wastes almost no time explaining itself before throwing Pandy and Retro into a violent adventure involving a prison, strange powers and exaggerated characters”

Sexy Commando Gaiden

Sexy Commando Gaiden features a martial art club with unusual techniques and eccentric character designs.

“Sexy Commando Gaiden: Sugoiyo Masaru-san is about Masaru and his bizarre school club, whose members practice a martial art built around unusual techniques rather than traditional fighting”

Bobobo-bo Bo-bobo

Bobobo-bo Bo-bobo uses nose hair whips and visual gags to create a nonsensical story experience.

“Bobobo-bo Bo-bobo follows the main character as he fights the Maruhage Empire using the mysterious art of Nose Hair Fist”

The main idea

10 anime series from the 1990s and 2000s that defy logic and still confuse viewers.

Read the original on CBR

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