Mikene Warrior Beast Argimon was a Shark Theme member of the Aquatic Warrior beast army. Argimon used his tail fin as a propeller to take off, making him a threat in both sea and air. Argimon's only weapons are his spit acid and his massive sharp back, which is can use to cut buildings. His real face was located in the shark's forehead.

Only making presence in 1974 OVA Mazinger Z v the Great General, he was one the first Warrior Beast in scene as it attack London. Later he is ordered with other Beasts under General Juuma to kill Koji and Z, and used its acid to melt the Z alloy. However the assassination attempt is stop with the arrival of Great Mazinger - Argimon tried to attack but its blown apart by Great's Thunder Break attack, been the 3rd monster from the attack force to be taken out - Mammothdon was melted by Z and later Dante blown up by the Photo Power lab when they launched Boss Borot in an effort to save Koji.