BULLTON

Found living in two meteorites which crashed on Earth in 1966, Bullton is composed of two small amorphous creatures which, when put one near the other, generate a gigantic centralized mass with several short tentacular limbs arrayed in all directions, many of which ended in orifices from which antennaes can extend which can emit energy whihc warp sapce and time. Bullton's body appears blue , gray and red. On a planet, it moves by rolling over.
Source: Ultraman "Passport ot Infinity"

MEPHILAS SEIJIN

Mephilas Seijin is an advanced species of biped with telepathic abilities which developed space flight. A Mephilas came to Earth in 1966 with projects of conquest. After being thwarted, it left the planet.
The Mephilas that came to Earth could fly, produce lightning bolt from their fingers as well as immobilizing rays, change size and teleport at will. It also had the power to resurrect dead individuals. It remains unknown if those abilities are natural or artificial, ot even representative of the species.

Source: Ultraman episode 33 "The Forbidden World"

ZARAB SEIJIN

Zarab Seijin are a an advanced species which developed space flight. They are 2 meters tall biped but can increase their size about 20 times and can change shape to imitate other lifeforms. It is not known if these abilities are natural or articificial.
Zarab Seijin came to Earth with intentions of conquest in 1966 but were thwarted.
Source: Ultraman

ZETTON SEIJIN

Zetton Seijin are a technologically advanced species of bipeds which developed space flight. They are 2 meters (6.56 feet) tall and weigh 60 kg. With two legs and two arms, they have a large cylindrical head with a with a kind of antenna organ on top of it. They can shapeshift but it is not known if this ability is natural or artifical.
They came to Earth in 1966 and attempted to conquer the planet using a 60 meters tall monster called Zetton. Zetton resembles a giant horned humanoid beetle with a glowing yellow streaky mouth down his face, striped yelloy black limbs and powerful black armor plates on the torso. The yellow panels on his chest are thought to be compound eyes. Where eyes are on most creatures, he has two sensory pits which can emit sonar or radar signals. Where ears would normally be are sensors that acquire the reflected signals. It can shoots 1-trillion-degree-Celsius Fireballs from his mouth, absorb energy waves and rays and recast them from his hands and create a protective force field around him. It is unlikely that Zetton is the product of natural evoluton and is most probably a creation of Zetton Seijin science.
Source: Ultraman TV series

BLASTERS

The Blasters are an aggressive green skined humanoid species reproducing themselves by cloning which seem bent on conquest of other planets. They tried to conquer Earth toward toward the end of the twentieth century but failed.
All blasters look the same and are dressed the same, their only differentication being a numeric identification on their costume over the forehead.

Source : Astroganger TV Series

VOLTRON CONQUERED SPECIES

The Galra have conquered at least two other civilisations of humanoid species that they use as slavelabor. Source: King of the Beasts GoLion / Voltron Lion Force TV series

GALBESTON / DRULES

The Galbeston (also known as the Drules) are an aggressive technologically advanced humanoid species which developed an interplanetary society.
The Drules are physically relatively close to humans but with blue skin and red eyes.
They have developed an oppressive monarchic society.
They may of may not be related to the Galra.

Source: Kikou Kantai Dairugger XV / Voltron: Vehicle Force TV series

GALRA / DRULES

The Galra (also known as the Drules) are an aggressive technologically advanced humanoid species which developed an interplanetary society through invasive expansionnism that originated of planet Galra, also known as Planet Doom.
The Galra are physically relatively close to humans but with pointed ears that enlarge with age. Their eyes are yellow and their skin color can be of all tones of blue. The ruling class seems to be of a median tone of blue while most of the populace seems to be of a darker blue. Children all have lighter tones of blue that darkens as they age.
They have developed a monarchic society based on conquest and slave collecting.
Some Galra are said to use some kind of magic.
They may or may not be related to the Galbeston.


Source: King of the Beasts GoLion / Voltron Lion Force TV series.

LEPONTINES

Lepontines are bovine modified genetically by representatives from an alien civilisation in need of warrior monks to lead their crusade in their place.

Source: Ghislain Barbe & Elie Charest "Earthbound"

EVIL HORDE

The Evil Horde is a spacefaring agressive power bent on conquest lead by a mysterious entity known as Horde Prime.
The few high ranking officers of the Horde, humanoid for the most part, all seem to be unique specimens, with might hint at some artificial origins or manipulations - either genetic or mystic, of the individuals. All are known to have special powers and often use magic. The bulk of the Horde's Power is composed of mass-produced humanoid robots.
Horde Prime and the Horde troopers bear a lot similarities, with the Beast and its army seen in the film Krull.

SNAKE MEN / REPTONS

Snake Men are a species of humanoid saurians who developed as an agressive spacefaring civilisation. They invaded planet Eternia in the distant past and were defeated. There now remains only a handful of them and most of them have devolved into the more peaceful reptons.

ETERNIANS / ETHERIANS

Eternians and etherians are humanoid species ressembling normal humans and genetically compatible with them. It has been hinted that they might be descendants from humans of the future.
They are the dominant lifeform on both Eternia and Etheria, sister planets orbiting a yellow sun whose exact spatial location remains unknown, although it has been hinted that it might be inside a space-time singularity, wether a junction of alternate universes or a pocket dimension caused by the presence, for a long time, of the Starseed at its core, a spark left over from the creation of the universe.
Some kind of wormhole exists linking Eternia's system to the Solar system and two space expedition have been known to fall through it.
Eternia is quite earthlike and has large bodies of water. It is separated into two very distinctive regions, the light and a dark hemisphere.
Eternians developped a technologically very advanced civilisation that has, for msot of it, regressed to a much more barbaristic state. Although some very advanced technology is still in use on the planet, it cohabits with magical science.
Apart from the dominant humanoid lifeform, the planet features an incredible variety of lifeforms, from monsters to sentient races.

PYROVILE

Planet of origin: Pyrovilia

The Pyrovile is a alien species that evolved on Pyrovilia. They are made of stone held together by living magma. They had developed space travel more than 2000 years ago when they lost their homeworld. They are very fragile to water exposition since it causes their magma to cool.
One of their survivor ships crashlanded in Italy, shattering them into dust. In 62 AD an earthquake which reawakened mount Vesuvius re-awakened them, and under gaseous form, they started possessing human hosts and planned to terraform Earth to make it more like Pyrovilia through the use of an energy conversion matrix. On Earth, they assumed a shape resembling that of giant roman gladiators but it remains unknown if this is their true form or if this likeliness was linked to the possession of humans. They were all destroyed in the AD 79 eruption of Mount Vesuvius.

ADIPOSE

Adipose are a sentient bidpedal species that developed a space faring civilisation whose body is mainly composed of fat.

Their natural mean of reproduction remains unknown but when their breeding world became unfit for use in the early 21st century, they enlisted the service of alien agent to have their birthing matrix implanted in humans through ingestion. Each matrix was building an adipose baby from large fat deposits contained in their overwieght human hosts. The baby was then extracting itself from fat mass with minimal harm done to the host. Adipose babies are notorious for their precocious motor autonomy. As soon as they are born they are able to walk with an overall good sense of orientation and purpose.
Source: Doctor Who "Partners in Crime"

CALAMARI FLY

The Calamari fly is an omnivorous nomadic animal species that lives in swarm. The swarm's path seems random and based on external olfactory inputs for what specialists have been able to determine. An adult fly can come up to a lenght of about 30 centimeters.

MIDOMAR

An 5th cm high alien species whose members can travel through radio waves and can recorporate themselves by draining energy from radio receiver devices.
Source: Torchwood website

ARKANS

Almost liquid alien species which developed a space fairing civilisation who visited the solar system in the early 21th century. They cannot survive in an Earht type envrionment.
Source: Torchwood, "Cyberwoman"

BESSAN

A winged species that was conquered and destroyed by the Krillitane.
Source: Doctor Who, "School Reunion"

SEX MONSTER / SEX GAS

A gaseous alien parasite that feeds on orgasmic energy. Composed of vorax and ceranium gases, Earth's atmosphere is poisonous to the alien, so it needs to take a human host to survive for prolonged periods. It vies for control with its host, causing physiological changes that eventually cause the host's internal organs to explode.

The alien also makes its host secrete a blend of ultra-powerful pheromones that cause tremendous sexual attraction in those around it for the purposes of feeding. Coupling with the host is fatal, causing the host's partner to disintegrate into a pile of dust at climax and allowing the alien to absorb the energy from the orgasm.

A specimen came to Earth in a meteorite in the early 21st century and landed near Cardif. Although the technological level of the entitiy is unknown, it refered to the meteorite as his ship and said it came to Earth by design, so it has some knowledge of interstellar scale and has the ability to manoeuver through space in a container of some sort.

Source: Torchwood "Day One"

DOGONS

The Dogons are a space faring reptilian species with thirteen eyes, each of which grant them especially enhanced perceptions in various respects. A Dogon ship crashed near the british town of Cardif in the early 21st century and some dead specimen were dissected by human scientists.
Source: Torchwood "Random Shoes"