Crime Big Four
A quartet of ruthless mercenaries and despots who joined forces to wreck havoc across the globe. Independent of Crime, they none-the-less joined forces with Iron Claw in a grand scheme to destroy Tokyo. The Big Four's headquarters was a gigantic flying saucer which could fly undetected around the world. The various Big Four commanded their own armies of followers including remnants of the splintered Black Cross army that battled Go Ranger. They prominently appear in 'JAKQ vs. Goranger.' Peggy Matsuyama / Momo Ranger had been tracking the whereabouts of the villains for a while. The Big Four had battled with Kamen Rider V3, Kikaider and Kamen Rider Amazon across the planet.
Iron Mask Baron
Iron masked dictator who had been terrorizing the European continent and fought Kamen Rider V3 off-screen. Leads the Iron Mask Battalion, his own specialized troopers. He carried a heavy iron shield and battle spear which he can hurl with devastating skill and a blowgun which he can use to fire poison darts.
General Sahara
African conqueror who once battled the Go Ranger off-screen in Africa. A master swordsman and strategist, he is both ruthless and cruel in battle.
UFO Captain
Captain UFO is an arrogant and astute criminal mastermind who commanded the UFO command ship that the Crime Big Four used to travel the world.
Hell Boxer
An intimidating tyrant from Mongolia who fought Kikaider off-screen and used his skull adorned armor to strike fear in his foes. Hell Boxer is savage and fierce warrior, he wields an iron ball and chain to crush and kill his opponents.
Four Deva Kings Robo
The four kings merged together to become a machine robot that was destroyed by the JAKQ and Goranger.

Crime Big Four | Mechanical Monsters | Invader Robots