Robotnik Sr. was born on Mobius under name John Smith (because nobody had this name before). His father was the King of Mobius and his mother was a professor of nuclear physics. John Smith recieved PhD in the age of ten and changed his name to Robotnik I. In the age of fourteen he moved to Earth and collided Mobius with it. (Currently Mobius is a part of Earth, located between Mushroom Kingdom and Hyrule). In the age of twenty he met Momma Robotnik. They both moved to Canada. Eight years later Robotnik II and RobotnikClause were born.