The Kintobor Family (also known as the House of Ivo) is an Overlander family (formerly Human until their species was changed to Overlander after the Xorda's first attack on the planet), best known for their remarkable genius that has been handed down from generation to generation, along with their affinity for committing villainous acts. The most well known Kintobor was Julian Kintobor, who successfully ruled over all of Mobius for a decade with an iron fist. Some of the more recent Kintobors (namely Julian and Colin Jr.) have taken the surname Robotnik, the surname of Professor Gerald Robotnik (and Julian's maternal grandfather).