Doctor Robotnik is the primary antagonist of the Sonic the Hedgehog television series. Formerly known as Julian until his coup, he overthrew the King of Mobotropolis, renamed the city "Robotropolis", roboticized its citizens to be his mindless Worker Bots and polluted the environment, becoming the dictator of Mobius. He has an army of loyal robots and is assisted by his conniving nephew Snively and pet robot chicken Cluck. His rule is opposed only by the Freedom Fighters, particularly Sonic the Hedgehog.