Clefable moves by skipping lightly as if it were flying using its wings. Its bouncy step lets it even walk on water. It is known to take strolls on lakes on quiet, moonlit nights. A timid fairy Pokémon that is rarely seen, it will run and hide the moment it senses people. Its hearing is so acute it can hear a pin drop over half a mile away. It lives on quiet mountains.
Pokédex entry #36
clefable in Pokémon GO
It's possible to hatch clefable from an egg?
No, clefable can't be hatched.
Which are clefable’s strengths and weaknesses?
clefable is a fairy type Pokémon. fairy type pokémons are strong against fighting, bug, shadow pokémons but weak against poison, steel pokémons. They are not affected by dragon type pokémons.