MechaGojira is rendered with a gleaming chrome frame that mirrors a battleship's hull, overlaid with segmented armor plates and exposed mechanical innards in places that invite close inspection. The color palette blends shiny silver with deep graphite panel lines, blue-tinted joints, and sharp red accents along the dorsal fins and chest. Its eyes glow with an artificial light, giving it an unearthly focal point. The limbs are posed in a ready stance, showcasing flexible joints, pistons, and riveted armor; the tail sweeps in a commanding arc, signifying balance and menace.

In the Gojira x MechaGojira (2002) crossover, Kiryu is a meticulously engineered guardian built by scientists to shield humanity from rampaging kaiju. Conceived as the ultimate countermeasure, it fuses Godzilla's fossilized heritage with cutting edge robotics, housing a battle AI and heavy arsenal within a armored chassis. When Godzilla threatens Tokyo, Kiryu activates, unleashing plasma cannons, laser ports, and crushing melee power. The story explores themes of responsibility and the costs of warfare, as humans rely on artifice to confront a living force of nature without fully severing ties to the monster's legacy.