Arguably the rarest production figures hail from Venezuela. There, a toy company named Unitoys produced and distributed a number of 6 inch ThunderCats figures. Unitoys used molds from Playful, another South American based toy company that produced and distributed ThunderCats in Argentina. Because of the mold re-use, the UniToys figures have a Playful stamp, though their overall quality, both in material and paint application, is what distinguishes them from Playful figures.
There isnt a definitive list of figures that were released, to date Lion-O, Cheetara and Mumm-Ra have been confirmed and Jackalman is rumoured.