Keroro

To save the Earth from alien invaders and their giant monsters, Dr. Kishida does what any other red-blooded mad scientist would do: he builds a giant robot—the ultimate feminine fighting robot! Unfortunately, his granddaughters refuse to pilot it! Apparently, they've got more important things to do than becoming teenage super-heroes. Besides, how are you supposed to study for your college entrance exams while getting beaten up in battle? The fate of the world rests upon two people: Aya Kishida, one of the doctor's granddaughters, who may have to give up prep school to pilot the mighty (and lovely) ARIEL; and a mysterious alien named Saber Starblast, who may have the power to defeat the invaders once and for all...

Dark Skies is an American UFO conspiracy theory-based sci-fi television series that aired from the 1996 to 1997 season for 18 episodes, plus a two-hour pilot episode. The success of The X-Files on Fox proved there was an audience for science fiction shows, resulting in NBC commissioning this proposed competitor following a pitch from producers Bryce Zabel and Brent Friedman. The series debuted September 21, 1996 on NBC, and was later rerun by the Sci-Fi Channel. Its tagline was "History as we know it is a lie."

Captain Scarlet heads up an international intelligence agency as they battle against the Mysterons, an alien species from Mars that vows vengeance after a misunderstanding with humans.

A loser college student was having a really bad day: The girl he was in love with only thought of him as her bestie; and he was diagnosed with terminal cancer with only three months to live. Then an alien life form that looked like a yolk body snatched him. It not only cured his cancer, it gave him super human abilities. But with the happy surprise came danger of extraterrestrial kind. For his friends and love one, he had to overcome his loser mentality and be a hero.

The show takes place from 1944 to 2002 and follows the lives of three families: the Crawfords, who seek to cover up the Roswell crash and the existence of aliens; the Keys, who are subject to frequent experimentation by the aliens; and the Clarkes, who sheltered one of the surviving aliens from the crash.

20th-century astronaut Buck Rogers awakens in the 25th century after a freak accident puts him in suspended animation for 500 years. Upon returning to Earth and discovering the planet is recovering from a nuclear war, Buck uses his combat skills and ingenuity to protect Earth and fight evil throughout the galaxy alongside starfighter pilot Colonel Wilma Deering and robot companion Twiki.

A furry alien wiseguy comes to live with a terran family after crashing into their garage.

Zim dreams of greatness. Unfortunately, though, he's hopelessly inept as a space invader. Desperate to be rid of the annoying Zim, his planet's leaders send him on a mission to infiltrate Earth, providing him with leftover, cobbled-together equipment. To their consternation, Zim succeeds in setting up a base on Earth and infiltrating human culture, posing as a human child as he plots the planet's downfall. Only Zim's archnemesis, Dib, recognizes that Zim is an alien, and of course, nobody believes Dib's claims.

Alien frogs come to take over the planet & get into all kinds of trouble while living under the roof of a small family.

The alien invasion force called Warstar destroy the Heaven’s Tower, the bridge between the Earth and the Gosei World, home of the Gosei Angels. Five apprentice Gosei Angels who happened to be on the Earth transform into Goseiger and fight to defend the Earth.

The peaceful alien invasion of Earth by the mysterious “Overlords,” whose arrival begins decades of apparent utopia under indirect alien rule, at the cost of human identity and culture.

Saitama is a hero who only became a hero for fun. After three years of “special” training, though, he’s become so strong that he’s practically invincible. In fact, he’s too strong—even his mightiest opponents are taken out with a single punch, and it turns out that being devastatingly powerful is actually kind of a bore. With his passion for being a hero lost along with his hair, yet still faced with new enemies every day, how much longer can he keep it going?