Dr. Ivo Robotnik


 * Dr. Eggman - current alias of the mainstream Dr. Ivo Robotnik (from "Sonic the Hedgehog" videogames).
 * Dr. Robotnik (Sonic the Hedgehog OVA) - the movie version of Dr. Eggman, an absent-minded scientist, who is ready to destroy half of the planet for an "Adam and Eve plot".
 * Dr. Ivo Robotnik (AoStH) - humorous version of Dr. Eggman from "Adventures of Sonic the Hedgehog" cartoon series.
 * Dr. Eggman (Sonic X) - another humorous version of Dr. Robotnik from "Sonic X" anime series.
 * Dr. Robotnik (Sonic The Hedgehog SATAM) - a darker version of Dr. Eggman from "Sonic The Hedgehog" cartoon series and the basis for Dr. Robotnik in Archie Comics.
 * Dr. Ivo Robotnik (Archie Comics) - the original version of Dr. Robotnik from Archie's "Sonic the Hedgehog" comics.
 * Dr. Eggman (Archie Comics) - a version of Archie's Dr. Robotnik from alternate universe, who later takes the place of original Ivo Robotnik.
 * Dr. Ivo Robotnik (Fleetway) - the version of Dr. Robotnik that inhabited the universe of "Sonic the Comic".
 * Dr. Eggman Nega - either an alternate universe version or a descendant of the original Dr. Ivo "Eggman" Robotnik from the videogames canon.