From The Mego Museum, specifically the gallery of contributor Steve Moore comes this custom Jemm figure.
Jemm, Son of Saturn is a repainted, shrunk DC 9" figure with a kitbash of Doc Mego parts rounding out the outfit.
The head is obviously that of the commercially available 9" Martian Manhunter from a few years back. A custom of J'Onn also resides in Moore's gallery, but aside from drabbing him up to look like a Mego, it's pretty still much just the commercially available 9" Martian Manhunter. The odds do not favor Jemm ever getting the same treatment, so this custom should hopefully salve the souls of his fans.