The explanation for the feat is quite simple. The Quantum Dial was using its spin to break space-time and create a Black Hole. The fact that he did not complete did not mean that what was being created so far was not a Black Hole. If you look at the image where the Xordas explain about the Quantum Dial you can see that
from the beginning the rupture was already sucking everything around showing that from early on it had the destructive properties.
The Quantum Dial through its rotation has the power to create a space-time rupture capable of creating a Black Hole.
Sonic through his speed is able to force the Quantum Dial to spin backwards. You can not force something that is spinning to go backwards if you do not generate a force greater than this. In other words, to do this Sonic would have to generate a higher power than the
rotational energy of the Quantum Dial to create the Black Hole.
You can not create something if your energy is less than necessary to create what you want. If the Quantum Dial through its rotation is able to create a 4-B Black Hole then the energy that Sonic releases through its speed must be higher than the power of the Quantum Dial,
otherwise it would not be able to reverse the power of the Quantum Dial.
In basic cases breaking space-time is unqualified, so we would not be able to understand the energy to do this. But as we are aware that the Black Hole would be able to destroy the entire Solar System of Mobius then it should be 4-B. In this way we can not assume that something is invalid if there is an explanation of how this is accomplished.
But, I must say I do not agree with this being scaled to the whole cast of Archie. Sonic is only able to accomplish this with speed, a very high speed and according to chapter 126
only Sonic had power to destroy the Quantum Dial.
I believe we can use this for Shadow because it is constantly being said to be able to move at the same speeds as Sonic, Scourgue as well. But in the rest I doubt that this can be escalated mainly because this is completely contradictory to what is said in the arc in which the feat occurred. Sonic rarely uses his maximum speed, except in cases where he faces opponents as fast as he or in the fight against Egg Beater.
In my opinion Sonic should have multiple keys depending on how fast he is at the moment. Well, I'm going to create a series of blogs analyzing all editions of Archie Sonic to find consistency in Sonic levels.
I'll start doing this as soon as I finish my last two blogs about the revision in Digimon Franchise (In fact it's not exactly a revision, just an explanation of one of the most obscure concepts of the franchise).