Fakemon

[Hoeloe]

-A Normal (or some other) type demon or doll thing that has several evolutions based on the elemental stone used to become a Normal (or some other) type/ Fire or Water or Grass or Electric type, and each evo would look like some form of conjoined twin, either two upper bodies joined at the waist, two bodies joined at the hip each with one leg, etc.

I like this idea. Though maybe the evolutions could take twists into different types of dolls. For example, using a leaf stone would turn it into a wooden puppet, while a moon stone would make it a dark type voodoo doll.