Okay, first of all, Davy, I do not have to prove that the Emeralds used in Adventure were different from the ones in Adventure 2. Aside from being an absurd notion, the point is irrelevant. My argument was that your reasoning for Perfect Chaos being Planet level causes inconsistencies which can only be resolved by writing off base Sonic defeating him as an outlier or PIS. If you do that, the Planet level Perfect Chaos is a definite possiblity. However, it means we then must rescale the rest of the characters, which would mean having to dig up feats to give them a new tier. However, that's exactly what you're trying to do here. Just don't use Perfect Chaos, please. There's enough issues on that end already.
As for Iblis, there's two issues on that end. First, he comes from Sonic '06, which needs no explanation as to why that's an issue. Secondly, the justification for him being Multi-Continental is quite ridiculous. It assumes he devestated the world in one or a few shots, which is a far-fetched assumption. The timeframe between the present time in Sonic '06 (slightly before Iblis was released) and Silver's time (where the planet is a fiery wasteland) is 200 years. That's plenty of time for almost anyone with enough firepower to lay waste to civilzation. Hell, mankind itself could waste Earth in far shorter time by firing nukes at each other.