The fact that the world joins hands against monsters is reflected in the design, color tone, and emblem of the giant armor, all of which correspond to their nationalities. The five main combat mechas are: Dangerous Wanderers in the United States, Crimson Storm in China, Cherno Alpha in Russia, Tango Wolves in Japan, and Eureka Raiders in Australia. The crew also put equal effort in designing a horrible monster that is dedicated to destroying the world. Del Toro summoned some industry concept artists to design what he called "the most terrifying but at the same time the most majestic creature you can imagine", each with its own characteristics and different lethal abilities.
It is the special effects technicians of the Light and Shadow Magic Industrial Special Effects Company that give life to the giant armor and monsters and make them jump on the big screen. This is the first time they have cooperated with Del Toro. Due to the large scale of production, the crew used every studio in Toronto Pinewood Studios, two of which are the largest in the world. The scene called the connecting cabin is created by a large balancer.
