Fedor was a black project conceived under Leonid Brezhnev in the mid 70s, and was nearly axed in the mid 80s, but stayed on proverbial life support until the fall of the Soviet Union. His original purpose was to be a super-soldier that could feel no pain, nor be injured. A Universal Soldier, if you will.
When the cost of production finally became apparent, and it became obvious that this model was not suitable for mass production, Fedor was retooled to be an unstoppable assasin/spec ops operator. When the Soviet Union collapsed, he was locked away in a vault, presumably never to see the light of day.
Fedor was stolen out of the vault by disgruntled Russian guards and was promptly bought on the black market by the Red Devil Sport Club. After some cursory updates and maintanence, he was ready to catalogue a variety of disciplines that were not originally programmed in, such as Muay Thai.
Completely versed in all necessary areas, Fedor was unleashed on the MMA world, and the world will never be the same.
Proof I am correct: