Get a load of this, buddy.
Dr. Ivo “Eggman” Robotnik has had a history of being consistently appealing across all of his appearances in the Sonic canon, but with inconsistent levels of a sense of menace.
In creating this design I wanted to increase a sense of intimidation in the best-known version of Eggman’s design.
A longer coat, a chain across the front, and a larger mustache were chosen in service of that objective.
Also chosen in service of that objective was a robot arm, which has the bonus of creating a thematic tie with the Sonic SatAM depiction of Robotnik, commonly regarded as his best presentation as a villain.
And of course, looking at his hand, well…
If you know, you know.