Malcult is an experimental Zoanoid model produced by Cronos during the earliest stages of aerial-type development. It has clear avian features though its body is covered in fur rather than feathers. It is stated to be a prototype of Casvarius or perhaps Citiciss.
Two Malcult Zoanoids were deployed against Sho Fukamachi shortly after he became the Guyver-I and attacked him at his high school. Of course, they proved to be ineffective and were quickly eliminated.