First of all, I am starting to see points in the painting world examples. All of them are definitely alternate world/dimensions and are clearly bodies of space. And I'm also glad to see some legit Japanese sources. While having starry skies or suns aren't enough to prove they're universes, and the dimensions being described as "Worldwide" seem rather hyperbolic. And using a dictionary definition doesn't really help much, it is clear that they all take place with their different flows of time. The fact that Mushroom Kingdom was clearly daytime throughout the entire game, while other dimensions do have day and night cycles indicate that. Although, it might be seen as just different planets having their own day and night cycles. And there are a multitude of "Infinite sized" statements. Those do indicate universal shenanigans, but I don't really like taking "Bottomless pit" statements literally. I'm fine with the sand one though. Also, we don't quite know how many power stars were used to create each dimension, but they were clearly shown. And starry skies make them 4-A sized at bare minimum. But here are some drawn conclusions for this.
The painting stuff is irrelevant to the thread, DDM, as using scans and statements from the Nintendo Power Guide is not acceptable for a Japanese Game. You can't ignore the entire discourse around this.
Wario World is clearly Universal. It's an official Nintendo of Europe statement and Japanese texts apparently consider that an accurate translation based on what I heard. But it's overall better to find Japanese texts and human translators.
Wario World is an outlier for Wario at best, and not something that scales to the Black Jewel's AP at worse.
The Super Mario Galaxy Grand Stars clearly have 2 Low 2-C feats based on both endings. But let me go over each and every one of the 12 boss fights.
They don't scale to the cast for reasons I went over.
1. Bowser is harmed by merely touching the Grand Star reactor. A tiny portion of the energy supposedly empowering him is enough to burn his tail hot, meaning he does not scale to the full might of the Grand Stars much less the Reactor Collapse which destroys the universe.
2. Peach and Bowser were going to be killed in the destruction of the universe and were shielded by Rosalina.
3. Bowser was reset alongside the rest of the universe and didn't tank anything.
Super Paper Mario feats are clearly Universal. Between Count Bleck tanking his own Universe, Dimentio possibly surviving. And Mario's party surviving the destruction of World 6. They are Universes since World 4 is a Universe and they're shown to be different times and spaces. So it's Low 2-C. ISL would be applicable for 3-A, but you cannot divide infinity by a finite number. So this is clearly Low 2-C durability. Although, I'm super iffy about scaling the Ancients creations to the universal creations. But Dimentio is a Ancient Tribe member, but he often toys with the party. So iffy about him scaling to anyone.
The heroes surviving the destruction of World 6 is possibly universal, but the Ancients are a super sketchy argument that has no justification to scale to AP much less the Mario Cast. They created worlds with lost magic-technology over an unknown period of time.
King Olly does enfold the very Fabric of Reality; which seems like a cut and dry universal feat. And we know he's effecting more than just the Mushroom Kingdom; he's effecting the stars above as well. And literally "All reality" implies the Universe they're in. This is another Universal feat. And it does scale to physical stats since Olly is physically folding the very fabric of the Universe like a sheet of origami paper.
This isn't a Low 2-C feat. All Olly says is that he is folding the fabric of reality, not that he is folding the fabric of reality on a universal scale.
He was going to fold the paper world into an Origami world, that's all he was doing.
Olly was using an Amp to do it and it's Reality Warping / Spatial Manipulation either way.
There are no seven solid Low 2-C feats, I am sorry DDM.