(Mostly from a random thought I had, mixed with a little bit of game/anime lore, creative liberty, and a plot device. Somewhat in the form of a scientific report/journal entry. This is why I don't try to write creatively. Sorry for any cringes I induce.)
Alolan Clefable
When groups of extraterrestrial Clefariy came to Earth (??) eons ago, most landed in mainland areas now comprising several major regions of the world. One group, however, landed on an isolated island chain that eventually became the Alolan islands. Sticking to what mountains and caves were available, Clefairy scattered around the islands in small communities. A problem arose when they could not find a source of Moon Stones, which allowed for evolution and were a centerpiece of their cultural dances. Luckily for their culture, a substitute was found in the form of a chunk of Sun Stone on Mount Hokulani, which radiated a familiar but different feeling than their native stones. After years of communing near the stone, an change took place one night. A few Clefairy began to evolve......and the rest is history. Today, Clefairy are reportedly seen throughout the islands at night, although their only officially recorded location is Mount Hokulani, where the same large Sun Stone is rumored to reside.
From a few documented cases, Clefairy native to Alola still can evolve into their mainland forms through the use of Moon Stones, but most prefer evolving via Sun Stones, possibly for long-held cultural reasons. The only distinguishable physical difference between the types is the presence of a 'skirt-like' pattern of red and orange markings around the waist area and the tips of their ears being red-orange. This skirt pattern seems to have been the inspiration of some traditional Alolan dancing outfits for women.
Type: Fairy/Fire
Abilities: Magic Guard, Flame Body, Dry Skin (Hidden)
Stats: [Research Underway] ((I'm not good with this sort of thing. Fire types aren't normally defensive, but this could one......))
Moves: Being a stone evolution, most of it's moves come from it's pre-evolutions, Clefa and Clefairy. However, Alolan Clefable are able to learn a few fire moves at higher level (as well as via move re-learners):
--Fiery Dance (Evolution), Mystic Fire (50), Heat Wave (50), Inferno (60), Burn Up (?)*
*At the time of this report, only one documented case of this move has occurred. Due to the move's nature of removing fire typing temporarily, it is unknown how this will effect an Alolan form who's main distinguishable difference between it's mainland counterpart is it's Fire typing. Some speculate repeated uses will revert an Alolan Clafable into it's mainland counterpart. This could be a unique case, but further documentation of Alolah's native Clefable will be necessary.