Clefairy appears to be a larger and more detailed version of its pre-evolution. Its stocky arms have now gained three digits on each of its hands, two of which appear to have grown nails. Each of its feet has gained a single clawed toe and its star-shaped body has now become more rounded, giving it a more chubby appearance. Its mouth has gained an elongated left canine and it has gained a wrinkle on either side of its eyes similar to crow's feet. The curl on its forehead and tail is now larger, and its ears are now longer, slightly less rounded, and primarily pink with brown tips and black undersides. It has gained small wings on its back, which are incapable of flight. Some more basic aspects have been left the same, as they are both tailed bipeds.
The most well known ability that a Clefairy has is the ability to use Metronome, a move that involves wiggling its fingers back and forth in order to execute any move at random. Even without Metronome, Clefairy is capable of learning a vast amount of elemental attacks. They can also store moonlight in their wings, allowing them to float in midair. It is one of three Pokémon able to learn Meteor Mash.
Clefairy are very shy and timid creatures. As such, they rarely show themselves to humans. They are among the most intelligent of all Pokémon, being capable of forming society and religion. They are also capable of constructing various means of transport. Clefairy also seem to have gained a reputation as kleptomaniacs, since there have been various reports of Clefairy being seen stealing random junk.
Clefairy are extraterrestrial Pokémon, and as such are elusive Pokémon in the wild. The best place to find them is Mt. Moon, especially at a night during a full moon. Wherever they live, they are likely to be in an area where the moon is clear and visible at night.
Clefairy's diet is unknown, although the presence of a canine tooth may indicate that it is an omnivore.
This Pokémon was unavailable prior to Generation I.