was talked about by Lillie
and her mother Lusamine
in an argument. Lillie
wanted to raise it without evolving it because she preferred it that way as it was cuter than Lusamine's Clefable
evolved it into a Clefable because it was her Pokémon and not Lillie
Out of all my Lillie
's mother's Pokémon, Clefable was her closest friend. While in the Ultra Deep Sea, it was sent out to battle against Lillie
by the Ultra Beast Nihilego. Ash's Lycanroc (Dusk Form)
stayed back to help battle Lusamine's Clefairy
with Lillie's Vulpix (Snowy)
. As Lillie
is not very good at battling, she decided to battle you it her own way by showing it the Clefairy doll the two of them used to play with. This help get it to snap out of Nihilego control.
It has the special Ability Magic Guard
which allowed it to cross the poison river in the Ultra Deep Sea with Lillie
holding on to it.