Dr. Ivo Robotnik, often known simply a Robotnik, is of course the most well known of Sonic's many opponents and while the videogame adversary is well known (perhaps more so under his alternate title of Eggman) their exists some alternate versions of the mad scientist that are not quite as well known.
Such is the case of the Robotnik found within the pages of the now discontinued Sonic the Comic, which was published by Fleetway as the main Sega-based comic in the UK.
Originally a kindly scientist by the name of Kintobor this version of Robotnik originally sought to erase all evil from Mobius via the use of Chaos Emeralds and was responsible for granting Sonic his amazing speed and distinctive blue coloration.
However something went horribly wrong during Kintobor's quest and he became corrupted into the larger-than-life Robotnik, an insane and power-hungry tyrant who sought to conquer Mobius in keeping with the events of the original Sonic games.
As the series progressed Fleetway's Robotnik would become ever more dangerous, arguably rivalling his Archie counterpart, though like his counterpart he would eventually be dethroned (unlike Archie however Fleetway never actually killed Robotnik off nor did they introduce Eggman into the mix).
Much as Archie had based their Robotnik on the one found in SATAM so Fleetway's Robotnik was based on the Robotnik found on Adventures Of Sonic the Hedgehog - ironically despite being based physically on the goofier version of Robotnik he was still a very valid threat to Mobius.
The personality of Fleetway's Robotnik has varied as different writers have had different ideas on just how threatening they wanted him to be, always dangerous he was originally also slightly comical with a tendency to obsess over egg puns - however some writers objected to this and tried to make him exceptionally dark.
As a result Robotnik would change considerably and while still retaining some comedic charm when needed he was, in general, a truly monstrous character and often plotted to destroy the planet entirely: this trait would separate him from all other Robotniks, out of all the alternative Robotniks it was Fleetway's that actively sought to destroy Mobius and almost succeeded on several occassions.