# 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. - Title: 10 '90s and 2000s Anime Series Too Strange to Last · CBR - Summary: 10 anime series from the 1990s and 2000s that defy logic and still confuse viewers. - Keywords: blue submarine no 6, key the metal idol, serial experiments lain, paranoia agent, tatami galaxy, excel saga, flcl, dead leaves, sexy commando gaiden, bobobo-bo bo-bobo, entertainment, culture - Source: CBR — https://cbr.com/90s-2000s-anime-series-too-strange-to-last-ranked - Author: Areeba Khan - Published: 2026-10-10T19:15:11+00:00 - Read time: 1 min - Topics: blue submarine no 6, key the metal idol, serial experiments lain, paranoia agent, tatami galaxy, excel saga, flcl, dead leaves, sexy commando gaiden, bobobo-bo bo-bobo, entertainment, culture ## 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 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 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 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 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 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 ## Key takeaway 10 anime series from the 1990s and 2000s that defy logic and still confuse viewers.