Metropolis is a grand high-tech city-state populated by humans and robots alike. It is in these streets that Detective Shunsaku Ban and his sidekick Kenichi search for the rebel scientist Dr. Laughton who unbenounced to them, is developing a super android named Tima as a tool for the Duke of Metropolis. What starts out as a normal case turns into mayhem as the scientist is murdered, and the true plans of the Duke are finally revealed...
The year is 2032. Tokyo has been destroyed by a great earthquake and a new city, MegaTokyo, has risen from the ashes. Humans now live side-by-side with androids known as Boomers who perform many of the menial and laborious tasks that humans despise, but these artificial servants come with a price: they have a tendency to go haywire and attack those they were built to serve. The A.D. Police force was created to try and stop this menace, but its weapons can do little more than annoy the Boomers. Hope lies with the Knight Sabers, four young women with high-tech, armored suits and enough firepower to stop an army - but will it be enough to stop MegaTokyo's greatest threat?
Having failed to earn admission to a university, Hideki Motosuwa has moved to the big city, determined to study his hardest for next year's exams. However, an unusual distraction presents itself one unsuspecting day in the form of Chii, a robotic young girl that has been discarded in the trash. In a world where an increasing number of people turn to these 'persocoms' for company, the bonds and limits of human relationships are tested as flesh manages to fall in love with the machine itself...
While on the hunt for an underage hacker, Faye is the sole witness to identifying a man who causes a tanker explosion that leaves people up to three miles away in comas. The bounty that ensues is the largest the galaxy has EVER seen, 300,000,000 wulongs. It's up to Spike and the gang to solve the mystery of this strange disease, and to stop the assailant at large, for failure would result in all life on Mars being eliminated on Halloween night.
They are both action-adventure films with suspense and thriller. They both have main characters who need to solve problems for things and help out with their assistants. Not to mention, they are roaming around the city to try and solve problems and they both seem to have the same feel with dramatic emotions and scenes.
In the world, there are those who hunt down rare and powerful items known as Lost Precious, including Ryuuji Kisaragi’s own parents and cousin Erika, who’s been studying abroad for the last few years. But when Erika suddenly returns, the boy finds himself in the middle of the action when she drags him along to intercept a special treasure from the nefarious Fang organization. What’s more, the duo soon discovers that this Lost Precious isn’t a jewel or trinket, it’s a rare dragon girl who instantly bonds with Ryuuji! Now, Ryuuji and Erika must help teach this dragon - who they name Rose - about the world, while keeping her safe and meeting other new friends and dragons along the way.
Both animes feature the main hero stumbling upon a meta-human blonde heroine with a limited vocabulary, who becomes attached to him.
They both focus on the mysterious origins of the female lead while addressing how she adapts to society and is involved in the happenings around them.
In a futuristic world almost barren of life, mankind is confined to mechanized domed cities where A.I.’s control all aspects of life. In this world, humans are no longer born, they are manufactured in a production line; and alongside them live androids known as autoreivs. Within one of these domed sanctuaries named Romdeau lives Re-l Mayer, one of a few citizens who aren’t entirely prevented from thinking. Her grandfather's prominent position and the affection of the scientist Daedalus have left her more free will than is normally allowed, but Re-l has started to question the sanctity of the city and the citizens' perfect way of life. With mysterious beings known as proxies causing havoc and a man named Vincent causing great influence on her life, Re-l must travel outside of the city to find the answers she seeks and discover the mystery behind "the awakening".
While plots in those two shows aren't very similar, cities that appear in both of them give a similar feeling (Romdeau in Ergo Proxy and Metropolis in the movie by the same name). It is worth noticing that, robots in both anime, seam to have similar social role as well as their role in the story (there is no Cogito virus in Metropolis, but still). Also there is a small similarity between Pino from EP an Tima from Metropolis. If you like dystopia shows with good animation, you should give those a try.