The Banki Clan Gaiark, "Barbaric Machine Clan Gaiark", with "Gaiark" being the portmanteau of "noble" and "harmful" are the antagonists from Engine Sentai Go-Onger. They are machine-men from Machine World who are last of their kind and filled with the desire to pollute the Earth.
Originally thought to be the last of their kind, the three Pollution Ministers ended up on Earth, known to them as the Human World, and decide to pollute it to serve as an ideal paradise for them. To that end, the Pollution Ministers uses the Deus Haguru Magear, a big gear Yogostein brought with him, to create Hellgailles Palace on an isolated island in the middle of the sea. But over time, it is revealed that the Gaiark's more powerful members have been acting on other Braneworlds. After the defeat of Yogoshimacritein and his forces, the remaining Gaiark exist within Gunman World.
Black Cross King
Crime Minister Yogoshimacritein was revived as a general of the Black Cross Army under the Black Cross King, taking on the title Crime Minister Yogoshimacritein of the Black Cross, with an army of Ugatz under his command. He battled Gokai Yellow, Gokai Blue, Gosei Black and Gosei Yellow but he was defeated by their combined efforts. He was resurrected by Black Cross Colossus in the giant battle and summoned the phantoms of Gaiark members Chirakasonne and Kireizky. They were destroyed with the other villains by the mecha of the 35 Super Sentai.
Several Ugatz were part of an army of past enemy grunts that were fought by the Gokaigers in Los Dark's ghost dimension which housed the 1500 spirits of the villains defeated by the Super Sentai. After losing some of their number in an initial skirmish, the remaining members from each grunt group merged to form the Combined Combatant. Though the stronger opponent, the Combined Combatant proved to be unstable due to internal conflicting among the grunts composing him over who got to finish the pirates off. Taking advantage, the Gokaigers used the Battle Fever J Ranger Keys to destroy the Combined Combatant with the Penta Force cannon.
Super Hero Taisen Z
The Nunchaku Banki was part of an Army of Resurrected (mostly Super Sentai) monsters led by Space Raiderafter the revival of Madou Demon King Psycho. They proceeded to attack the gathering of Kamen Riders and Super Sentai, giving them a hard time. The heroes of recent years were in a pinch until the arrival of a force of Sentai and Rider reinforcements led by Akarenger and Kamen Rider #1. The combined forces of superheroes were able to turn the tide against the Madou army. They lined up and used their various finisher attacks to destroy the revived monsters.
- Venjix Computer Network - Power Rangers counterpart in Power Rangers RPM