Kondrati Topolov is the son of Russian scientist Yuri Topolov, also known as the Gargoyle, and is himself a mutant. Kondrati inherited his father's grotesque appearance and superhuman intelligence, although he was born disfigured unlike his father, who was mutated over time from the exposure of radioactive materials. A brilliant scientist like his father, he created the high-tech gear used by the Soviet Super-Troopers (the immediate precursor to the Soviet Super-Soldiers), and for a time wore the Titanium Man power armor. He operated out of a secret base named Bitterfrost in Khystym, Siberia. He created a pet for himself named Droog, which was a talking monster created through genetic engineering.
Gremlin is a mutant who has inherited the genius level intelligence that his father, the Gargoyle, gained when radiation mutated his brain. It is unclear whether or not Gremlin's intelligence is of a superhuman level.
Gremlin has completed doctoral level programs in various sciences, and has attained mastery of many areas of science and technology, notably the design of battle armor, strength-magnifying exoskeletons, and computer technology, as well as genetic engineering.
A very basic and seen before recipe, a Marvel Showdown Moleman with cast head of Gremlim from Mecha Hulk.