There is a lot to cover here, and I don't have an awful lot of time on my hands, but from what I see, not too much seems to be an issue here. With that said, there are a few things I want to bring up.
I've since written a better version of the Magical Paintbrush's 4-A rating, so would like to post that here.
In Super Mario Sunshine, Bowser Junior steals one of Professor E. Gadd's inventions, the Magic Paintbrush. He uses this paintbrush to pollute Isle Delfino in an attempt to frame Mario by entering a disguised form known as Shadow Mario. However, it is implied throughout the game that he also used the paintbrush to create enemies to hinder Mario, such as how a Pianta noted
Petey Piranha can't be natural and how
Gooper Blooper disappears upon making contact with the sea, much like how the paintbrush's graffiti dissolves when sprayed water. Super Mario Encyclopedia
outright claims Bowser Junior created the enemies as well. Therefore, we can see that Bowser Junior is using his paintbrush to hinder Mario's progress, and thus is likely to have created all the struggles Mario faced throughout the game. This would include the Secrets, realms encountered in numerous episodes. In the episode "The Shell's Secret",
"a pathway to another world" was said to have opened since the last episode, showing that Secrets are made within a short period of time (and thus likely in one go). Due to the fact
goop can be seen coming out from the entrance to a Secret in Bianco Hills, and
Shadow Mario always ambushes Mario whenever he enters a Secret, it is very likely that there is a connection between the Secrets and the Magic Paintbrush.
In terms of size, the Secrets are shown to hold
a myriad of stars and even
a full-on Moon and nebulae, and so these realms are large enough to contain multiple solar systems.
Creation feats are seen as just as valid as destructive feats in the tiering system, and thus the Magic Paintbrush should be deemed to be at
Multi-Solar System level. Mario has been shown to
take hits from the Magic Paintbrush itself. His durability in this game can be equalised to his attack potency too, such as how
Gooper Blooper's tentacles can harm him and yet he can
overpower them and rip them off, and how Petey Piranha, who can harm Mario, doesn't hurt himself when
swinging his head or
spinning his arms, but
Mario can attack with enough force to do damage to him. Therefore, we can safely say that Mario is
Multi-Solar System level. This feat applies to Mario's base as there is no proof that Shine Sprites, the collectable of the game, are able to boost the user. They are
distinctly different to Power Stars and serve a completely different purpose, and so there is no reason for this feat to not apply to base Mario.
(Also, a sunset appears in one of the Secrets, I forgot to mention that, so we can know for sure they're big enough to fit stars in them)
And how a few queries:
For the dimensions created by King Boo, the links seem to just show some areas and not actually any proof that King Boo created them. What exactly is the basis of the claim?
The World of Nothing explicitly has space (i.e. spatial dimensions have persisted), as we can see roofs and gates of the Sammer Kingdom's former glory, and can even bump into/interact with them, as well as a lesser form of the Pure Heart (whilst, yes, Pure Hearts can exist in Dimenion D, which arguably doesn't exist due to not falling under The Void's radar, but this was a lesser form, so that trait might not carry over). I also believe some time based items work here (I don't see why they wouldn't, and they could probably be used in the battle against Mr L). Not to mention numerous scenes occur here, such as a battle with Mr L, Mr L's demise at the hands of Dimetio, etc, so it feels like there should be time.... not to mention if space still exists, why wouldn't time? So, I don't think this claim has much merit to it, personally. We see the Void is growing throughout the game, and it doesn't affect All World as it should until it reaches its full potential (we see multiple worlds being affected at once when Super Dimentio is born), so this was more so a lesser version of The Void that destroyed the Sammer Kingdom, hence why it wasn't destroying space-time like it should have. So... I don't quite agree with that point.
Everything else seems more or less fair, but I might go into more deph on each point when I get a chance. Nice CRT over all.