Captain Gatenzone is the commander of the Crisis Empire's Robot unit and a secondary antagonist in Kamen Rider Black RX. He had the ability to detach his own head from his body, with his body being able to still move on its own without his head.
Gatenzone fought Black RX occasionally and is armed with a blaster and a powerful motorcycle. In his final episode, he died fighting Black RX while attempting a suicide bomb (With his head separated from his body) attack, with only his head remaining before it was shattered by his own laser beams reflected by Black RX.
- Cyclopter, Gatezawn's counterpart in Saban's Masked Rider.