Destro-King resembles a cybernetic two-headed dragon. His body extends to a great height, with his necks splitting just before the heads. On his necks, he has bright blue spikes. Both heads have three spikes on their scalps, along with bright pink eyes and long horizontal horns. They also have mandibles similar to Gigan. Destro-King has a midnight-blue body with several silver spikes and ridges in his chest, as well as a diminutive pair of silver wings on his back. He also has metal toecaps and a long tail.
Perhaps most unusually, Destro-King appears to have what looks like a fuel tank embedded in his back, which is most likely used to power him and supply energy for his attacks.
Destro-King was deployed by the Garogas with the intention of killing the Zone Family off, and arrived in a special capsule. Set free, the monster brought havoc to the Japanese countryside until Zone Fighter came to confront him. The two fought, but Zone Fighter was almost useless against the new monster, and even his Meteor Missile Might couldn't faze the creature. Zone Fighter was almost killed, had it not been for the intervention of the rest of the Zone Family, who blasted one of the machine kaiju's heads clean off! The Zone Warriors then used their beam lamps to revive Zone Fighter, and he fought a now-weakened Destro-King, ultimately causing Destro-King to overheat and explode.
Destro-King has a great degree of strength, and can knock enemies over by headbutting them. He can also fire red lasers from each of his heads.
Destro-King uses altered Muruchi roars.
- Since Destro-King's heads are operated by the suit actor's arms, the fuel tank in Destro-King's back was where the suit actor's head would be.