Gear REX was created due to mutations from nuclear test sites. Because of the mutations, Gear REX developed a protuberance resembling a gun–turret, as well as a highly acidic and corrosive mucous that is capable of melting absolutely anything it comes into contact with. However, the mucous can be reverse-engineered to form a highly flexible and sticky substance. When creating the substance, its bodily fluids are turned into a purified form via filtering them, which results in it becoming incredibly concentrated. Further distillation of the filtered bodily fluids from Gear REX will increase the concentrated state to devastating levels. It is also capable of ejecting the spines on the side of its head and its roar can vibrate the spines and cause them to shatter, which is effective in stunni