Best extraterrestrial Pokemon?

The star-shaped Cleffa are said to have come to earth on meteorites. Wherever a meteorite lands, there is always a Cleffa near. In HGSS, Cleffa and their evolved forms, Clefairy and Clefable, dance in a ring on Monday nights, nights with a full moon, and on nights when meteor showers occur. Clefairy and its evolutionary relatives tend to make their habitat at impact sites, and Clefairy evolves into Clefable from a Moon Stone, further evidence that they are extraterrestrial in origin.​

Lunatone and Solrock are said to have come from space and to draw their power from lunar and solar rays, respectively. They are both known as "Meteorite Pokémon," as they were discovered near a meteorite strike site approximately 40 years prior to the events of Pokémon X and Y.​

All Pokédex entries regarding this Pokémon explain that it was originally an alien virus that fell to earth in a meteor. Exposure to a laser beam mutated the virus's DNA, resulting in the Pokémon Deoxys. Upon further exposure to meteorites, Deoxys's Forme will change. Deoxys has four formes, adapted for survivability in the wild, and its specialized formes have some of the highest base stats of any Pokémon. The crystalline organ on its chest appears to be its brain, a departure from typical terrestrial Pokémon biology. Deoxys are described by the Pokédex as highly intelligent, possessing psychokinetic abilities, and are associated with auroras.​

The Pokémon known as Kyurem, according to old myths, fell from a meteor that crash-landed into the Giant Chasm. The tale tells of a monster from space that roamed towns, bringing cold winds and would eat people it had taken away.​

Starmie are said to be extraterrestrials because of their star-shape and their seven colored core, which emits radio signals into space at night. Staryu behave similarly, gathering at night and flashing their red cores to communicate with the stars. They are also known to have remarkable regenerative abilities, including Recover and Natural Cure.​

Elgyem and Beheeyem allegedly appeared 50 years prior to the events of Black and White Versions in the Desert Resort. It is unknown how or why they appeared, although rumors of its origin are linked to a UFO crash site. This could be explained by their ability to rewrite the memories of the people and Pokémon around them. They survive hostile encounters by using their psychic powers to confuse opponents. In the present day, they are no longer found in the desert, and have relocated to high up in the Celestial Tower and on Unova Route 14, respectively.​

It eats dust in the atmosphere. The composition of the dust determines the color of its core. Places where Minior fall from the night sky are few and far between, with Alola being one of the precious few. Minior forms in the stratosphere from an aggregation of mutated nanoparticles, where it absorbs particulate matter from which it builds its core and shell. Eventually, this process makes it too heavy and it falls towards the surface of the planet. When its shell breaks from landing, Minior becomes lighter and capable of attacking quickly.​