Dr. Robotnik

Dr. Ivo Robotnik better known by the alias Dr. Eggman is the main antagonist of the Sonic the Hedgehog series. He is a human and the arch-nemesis of Sonic the Hedgehog. This large scientist with an IQ of 300 dreams of dominating the world, but his constant plots to create his Eggman Empire (a.k.a. Eggmanland) are always thwarted by Sonic and his friends.

Why He Rocks

 * 1) He is one of the most famous villains in video game history.
 * 2) He is totally not what you not expect from a fat guy with a funny mustache.
 * 3) Eggman's many incarnations treat him in very different forms of his character, ranging from very threatening to very goofy.
 * 4) *At his most threatening, he provides an scale from the villain who fits the bill and at his goofiest, he is the most laughable, enjoyable and entertaining throughout the whole Sonic series.
 * 5) He is like the perfect opponent to Sonic, it's the eternal battle between the blue, light-hearted, super-fast, super-powered and courageous hedgehog and the fat, nerdy-looking, selfish, villainous and sometimes childish old guy in red.
 * 6) In his canon appearances, he is such an riot, just enough to be hands down, the most lovable character in the Sonic series.
 * 7) He makes every battle he has with his enemies count.
 * 8) He is an emperor, a dictator a stylish billionaire ruling with an iron fist over an entire nation made of nothing more than machines.
 * 9) Also, despite being fat, bald, mildly unattractive and with a despicable personality, he can be a gentleman, a wealthy philanthropist, a man who can be so captivating to the point of fooling others into doing whatever he wants.
 * 10) Most villains or anti-heroes are nothing but uninteresting, forgettable fellows who are usually never used in the series again, while Robotnik is a well-developed and sometimes even sympathetic antagonist who keeps coming back. He became so important to the franchise that Sega just can't replace him.
 * 11) Robotnik keeps coming back, he is so desired and so important to the series that putting someone else in his place is nothing but a crime to the fanbase and it took a while for the creators to figure that out.
 * 12) He's been in more games than even the titular, main character himself.
 * 13) He has such funny phrases like "Snoo-ping as usual,I see" and " I HATE THAT HEDGEHOG!"
 * 14) One of Eggman's more admirable, if not dangerous, traits is his courage throughout life-threatening situations. Despite Eggman's continuous use of machinery to both protect himself and fight his opponents, Eggman shows considerable bravery and very rarely shows fear, regardless of who or what he is facing.

The Only Bad Quality

 * 1) Despite his high intelligence, Eggman can be very immature, like throwing temper tantrums when Sonic manages to wreck into his plans.
 * 2) *An example of his immaturity is in the ending of Sonic Unleashed, when Orbot begins to insult him over his constant failures and calls him a loser; Eggman screams "Oh, shut up!!", attempts to kick him only to comically fail, and then chases him through the desert while making agitated noises and violently flailing his arms in an attempt to grab him.

Trivia

 * In the live-action/CGI big-screen adaptation of Sonic the Hedgehog (2020), Eggman is portrayed by lovable comedian and actor, Jim Carrey.
 * Carrey's portrayal has been indefinitely praised by the fanbase, even being called the "saving grace" of the film, prior to the redesign of the main character, of course.