Save this comments since i'm not going to rewrite to the other thread:
1] 5-B
It's consistent with
Sonic defeating the Chaos Emerald Absorbed forms of Chaos, only one could
move a continent or split the planet. Also, Chaos-6 being empowered by six emeralds which Eggman later used to
blow up the moo, currently used to scale most characters.
2] At least 5-A
It's least 5-A is from
Dark Gaia's feat .
3] Why Perfect Chaos scales to it?
Stated that he was using the negative energy of the emeralds, said negative power drained from Super Sonic caused
Dark Gaia to awake , like Chaos D.Gaia is a being filled with negative thoughts.
4] Why its currently used as a Low End for Most Super Forms?
Because Super Sonic
easily defeated Perfect Chaos in Adventure, but in the
same way he would later do in Generations by entering inside where is less durable, but Super Sonic was very casual when he did it.
4.5] Is at least 5-A Low-End necessary for the important Super Forms?
To me, it's not really that important as it's an held back/weakened state in Unleashed state from example Super Super Sonic, it's like a Low 4-C helding back to defeat a 5-A character.
5] Why Base Sonic and co. does not scale to 5-A
What was said above, also Base Sonic was
only able to destroy Dark Gaia's eyes which are far less durable than its main body. 5-B is overall more consistent.
6] Base Erazor Djinn
He seemingly overthrow the arabian night creator, but that should scale only to him and not Base Sonic and co.
7] 4-A
It comes from the
Final Egg Blaster , Eggman casually built this weapon and attached to the Death Egg to
merely to activate Emerl original program. Despite the time period, this is seen to a very simple thing he built and was not built for any battle porpouses, there could be the possibilty that Eggman can built a battle mech with that same raw power if he was forced to, Eggman most of the times expects to fight Base Sonic not Super Sonic [In Unleashed he planned to drain his power for negative use], later on he would meet his Nega self and built 2-C mechs with him since his Nega self is kinda his successor so he has the resourches to make a tier 2 weapon happen while regular Eggman cannot as Solaris was not his creation and Time Eater was already Low 2-C before being mechanized.
8] The possibilty of scaling
With that said above, in Heroes Eggman
saw Overlord as something that he could not stop as he's combined his data with everyone and was above all his creations, and what could have imagined at the time to stop it as Eggman was betrayed by Metal and immediately thought of the Emeralds [Eggman did not likely quickly gained the thought to concept a tier 4 weapon due his intelligence as there is likely not a big gap of time from Heroes where Eggman was locked to Battle, so Eggman can likely concept said weapon before the betrayal]. In Battle despite happening after Heroes, he built this weapon with no problems and threated it as something not magnificent and complex only as a special weapon for that specific need. In this period Eggman did not saw tier 2 stuff sans Void/Lumina, but this being has no connection with the Chaos Emeralds.
Even if the previous stuff is not enough, the main thing is that Eggman
tested the power of one single emerald and planned to search the others in
Advance 3 since and he knows that the emeralds had great power since they previously stopped Overlord, so there is possibilty that they are higher that all his types weapons at the time since he wanted to search them, again the only tier 2 being he knew at the time was only Lumina and this game takes place after Battle since Gemerl is Emerl successor, also Devil Doom
remarked at 4:00 that he underestimated the true power of the emeralds meaning that they have more power than he had imagined.
9] Who can possibly access it
Fully Emerald Users like Sonic, Shadow, Silver, Blaze, Knuckles, Tails, Mighty, Ray and Overlord via the Eggman stuff.
10] Who likely cannot
The others
