I feel like the way a lot of this is written doesn't properly convey my tone (probably could have been formatted better too) but it's a lot of crap I don't want to reword.
Just as an opening question: doesn't the fact Sonic was able to be erased mean he isn't resistant to EE? Even if the ring aura is what brought him back, it didn't keep him from being erased, it brought him back afterward. I mean, everyone else came back on their own without a special ring power, why don't they get resistance?
There's no evidence either way that Robotnik's clothes were destroyed in 50, that's a big fat assumption. Him being brought back with clothes on in 108 doesn't prove anything for either of us. If they weren't destroyed, he'd need new clothes, and if they were destroyed, he'd still need new clothes. There's no reason for why he has clothes that wouldn't work in both scenarios. Robotnik believes the Annihilator has
worked properly after hitting Knothole, despite the entire city being erased instead of just the Mobians. This (admittedly weirdly) implies that other things can be included with a person, but obviously not another person due to the purpose of the Annihilator. There's also that clothes seem to be considered "part of a person" when it comes to the roboticization process despite it supposedly affecting
organic material. This means his clothes could be considered "part of him" for writing purposes (partially because comic logic, but still) If his clothes aren't considered "part of him" then why were they brought back with him?
Yes, Sonic does have a ring aura that protects him, but that ring aura was shown to need outside assistance just to unroboticize him. Which heavily implies it shouldn't be able to bring Sonic back from a state of non-existence all on its own. We can't draw the conclusion that Sonic returned due to his ring aura based solely on a ring being on panel. You said yourself that there are no statements about Sonic coming out of the ring. Meaning there's no concrete reason to say it's the ring aura; everything you say about it you have to come up with yourself, which is just a fancy way of saying it's unsupported.
The encyclopedia says Snivley "replaced" everyone's biodata with Robotnik's, no one else's was still programmed.
How does Dr. Quack not knowing if Sally would wake up from a coma make him unreliable when talking about the Annihilator? Not only is that completely unrelated, but it's not even him being unreliable; real-life doctors also can't predict when people will wake up from comas (yes, this is fiction, but it still doesn't work as an argument) You also can't just declare he doesn't know how the Annihilator works for no reason. Him talking about its functions proves that he is more knowledgeable than you say. The encyclopedia even confirms that what he said Snivley did is correct. If he only knows about the neutron chip, how did he know this?
The encyclopedia only mentioning Mobius blipped doesn't mean it's saying the Annihilator only affected the planet, it even mentions that the Omega Wave weakening the prime zone's boundaries. It doesn't contradict Locke's statement; it works in tandem with it. If the news said a bomb took out my entire city and I tell someone my house was destroyed, we're not contradicting each other, we're talking about different aspects of the same thing. I mean, in your own recap of the plot you only say Sonic and Robotnik vanished into White Space, but I understand that you aren't saying they were the only ones affected by the Omega Wave.
Unless you're arguing semantics "an instant" and "billionth of a second" mean the same thing. The encyclopedia doesn't have to repeat Locke's exact words to get the same meaning across, it's not vague at all. The encyclopedia also doesn't separate what actually happens to Sonic and Mobius, and that's what's relevant. It mentioning Sonic specifically doesn't matter when he performs the same action as Mobius; he's mentioned to better separate him from Robotnik as it was just talking about the both of them prior. It doesn't contradict what Locke says at all. It's just like when you said "Sonic and Robotnik faded into White Space", you listing Sonic and Robotnik separatly doesn't mean they didn't both fade into White Space. If "Sonic and Robotnik faded" means they both faded, then "Sonic and Mobius [returned]" would mean they both returned, no separation. Could the encyclopedia have been clearer? Sure, but it could have been clearer a lot of different ways about a lot of different things, not just this, it was as clear as it needed to be.
The belief that Dr. Quack and Locke are mouthpieces for the author is validated by the encyclopedia repeating what they said (not verbatim mind you) as part of its narrative, solidifying that what they said was correct.
Coming to the conclusion that Sonic has type 8 relies exclusively on assumptions. (it can hardly be considered a conclusion really) We have to assume that the encyclopedia isn't as straight forward as it's written because we have to assume Sonic coming out of a ring means the ring aura brought him back because we have to assume Sonic couldn't come back like everyone else because we have to assume Sonic was going to stay annihilated because we have to assume Robotnik's clothes stayed erased because we have to assume that would for some reason cause Sonic's situation to change somehow.
But we don't have to assume any of that, if Sonic came back with Mobius the way it's (effectively) said in the encyclopedia, that's all that needs to have happened. No other story details need to be added, no blanks need to be filled in. And even if you want to argue that that is also an assumption (it really isn't) it's still only one far simpler assumption compared to at least four baseless ones.