Here's something else: in Blast to the Past, Chuck mentions there were test subjects for the roboticizer. Where did they go, and did these subjects inspire Robotnik's interest in the roboticizer?
The robot double from "Sonic and Sally" could very well have been a roboticized Mobian!
One of the early episodes had Robotnik capture an elderly Freedom Fighter known as Cat. By the end of the episode, Cat disappears. Because he is never seen again and he doesn't seem to have been roboticized, one can assume that Robotnik killed him.
Robotnik menacingly tells Cat he has "marvellous machines of all kinds, machines that can do things you would not believe!", which implies that Cat could have been tortured to death without even making it as far as the roboticizer.
There don't seem to be any humans aside from Snively and Robotnik. While it was planned for Mobius to be Earth After the End, Robotnik's backstory means that they weren't all wiped out. Did Robotnik kill them? Or is this the reason his SWATbotsresemble people?
Adding fuel to the fire, if they are roboticized humans, then throughout the entire series Sonic and the Freedom Fighters have been killing, dismembering , and even WEARING humans!
In their defence, they probably don't know that they're humans, given that the main cast were very young when Robotnik took over. Which is still just as scary.
According to commentary from Ben Hurst, the planned secret origins for Robotnik and Snively were that they originally escaped from a human space colony that they accidentally destroyed in trying to conquer, only to find themselves on Mobius — actually Earth, over a thousand years after they left it. So there were no humans around when they arrived. Which doesn't really make things any better...
In the 2-part episode "Blast to the Past", Robotnik is the same way in the past when Sonic and all the other Freedom Fighters are kids than he is in the show's present as opposed to his AoStH form so this confirms that the two shows have different continuities.
Sonic botches the time travel by getting distracted over food, landing him and Sally on the day of Robotnik's coup instead of the week before like Sally planned. In a way, the war and everything that's happened is Sonic's fault.
In "No Brainer", Robotnik exits the scene early on and leaves Snively to take care of things, under threat of vicious beating and possible murder if he doesn't do a good job. While that's unfortunate enough, Robotnik's reason for leaving is that there is a 'little freedom fighter uprising on the northern frontier' that he's off to, in his words, eradicate. He returns less than a week later.
Dulcy's non-sequiturs about her mom become tragic when you learn she's nearly the Last of Her Kind.
Chili dogs come from pigs. Sonic has a pig in his team of freedom fighters, and pigs lived in Mobotropolis.
Unless they're veggie dogs.
Speaking of eating meat, Robotnik and Snively have to eat and drink to keep themselves alive. Robotnik is obsessed with destroying plants and wildlife. No plants means no food...unless you eat the animals. It could be possible Robotnik kills and eat some of the captured animals instead of roboticizing them.
Alternatively, he simply prefers the taste of synthetic food manufactured in factories.
The chemical in the metal-eating balloons that appear in "The Doomsday Project" might have been harvested from the plants that appear in "Sonic Past Cool".
This series averts The Revolution Will Not Be Civilizedbecause of the Robians; even though it would be more effective for the Freedom Fighters to destroy Robotnik's factories and generators, they can't do that without risking killing their own people in the process. And Robotnik probably knows this — it may even be why he decided to keep the Roboticizer instead of just creating an army of killer robots and exterminating all Mobians.
As much as Robotnik's polluted territories seem a typical anviliciousGreen Aesop, there's actually a very real, very pragmatic reason it's like that! Robotnik's end goal is to replace all organic life on the planet with machinery, up to and including the native population. And robots don't need a healthy environment. Radioactive waste everywhere, smog-choked skies, toxic water, none of this matters to a sufficiently robust mechanical lifeform. However, Robotnik's still-organic enemies are vulnerable to such depletions of their natural environment. Thusly, Robotnik deliberately pollutes with his factories as a form of biological warfare; as the environment gets worse and worse, the Freedom Fighters get weaker from lack of food, lack of drinkable water, poisoning, poor air, etc., whilst his mechanical armies march on unhindered.
The thing about radiation is debatable, as radiation causes damage to electronics, requiring the use of "radiation-hardened" components in machinery intended for use in high-radiation environments.