The idea of a cunning doctor is something I've been meaning to see for years, he really has been depicted to much as an incompetant blubbering fool with no real value as a villain, unleashed I feel nailed it a fair bit, which is where some of this is inspired by, sure it's not the same style and what not, but the idea of a doctor who is capable of devious feats is what was going on in my head.
The darker tones is something I've fallen in love with, this in particular I thought would suit the doctor, a man surrounded by robots and cold metal, so some of that metally feeling has had to rub off on him.
THough next I'm gonna attempt a more retroy happy bright eggman see how that turns out C: