Kiryu is a bio-robot constructed by the Anti-Megalosaurus Force to combat Godzilla. Kiryu is constructed around the skeleton of the original Godzilla, who was killed by the Oxygen Destroyer in 1954. Kiryu was programmed with special "DNA computers" designed to make him operate like an organic creature, although the DNA sequence used in these computers had the unintended effect of leaving Kiryu susceptible to Godzilla's roar, which reawakened the original Godzilla's spirit and caused Kiryu to go 