This is a Mutant-Makamou 変異体魔化魍 I created for years ago for his Kamen Rider Genki fan-fiction.
Mutant-Synthrodrone 変異体シンスロドローン: A failed experiment that Drakken made based on a Douji 童子. Once a douji based Synthrodrone, but then started to mutate into an out-of-control killing machine.