Cleffa
The Star Shape Pokémon
Type: Fairy
Official Registration #: 173
Entry: Because of its star shape and tendency to appear during meteor showers, it is said that cleffa and its evolved forms originated from either the moon or elsewhere in space. In order to determine if this claim has any grain of truth to it, tests have been proposed by numerous scientists throughout history to determine whether or not cleffa can withstand the extreme conditions of space. However, no test has ever gotten past the proposal stage for two reasons. First, cleffa are listed on the endangered wild pokémon list, making testing with them virtually impossible. Second, shooting a pokémon into the vacuum of space is generally frowned upon by ethics boards.

Clefairy
The Fairy Pokémon
Type: Fairy
Official Registration #: 35
Entry: The evolved form of cleffa, via happiness. Little-known fact about clefairy—they secrete a sticky substance from the backs of their throats that hardens into a crystalline form upon exposure to air. Additionally, their tendency to dance under the light of the full moon is actually an irresistible drive, not simply a behavior some of them enjoy if given an appropriate amount of time and space. Both of these facts make life as a clefairy rather awkward, but on the positive side, their fur is about as soft as velvet, and the ability to hear even the most subtle sounds is a plus. …Not that the writer would know anything about either, of course.

Clefable
The Fairy Pokémon
Type: Fairy
Official Registration #: 36
Entry: The evolved form of clefairy, by exposure to moon stone. Although its pink fur, its rabbit-like ears, and its bouncing gait make it an adorable choice for a pet, this pokémon is not to be underestimated. In truth, clefable possess enough fairy magic to bring down a rampaging hydreigon, and this combined with its extremely acute hearing and its disarmingly soft and cute look make it a vicious predator of dragon-type pokémon. Entire hordes of clefable have been known to take down wandering dragons. Whether this is to feed their expansive clefairy colonies or simply because they enjoy hunting for sport is still a matter of debate.