2. First off, as we know, the Marioverse has mentioned and stated that it runs off of String Theory in Wario: Master of Disguise, what with
String Theory Soup. I feel as though this item is very important and trustworthy for many reasons... one, it was stated by a third-person
omniscient narrator, meaning it's a solid fact. Two, it's definitely canon since it's canon in the game's story that Wario steals and keeps all the treasures he stole. And finally, because it is implied to have been
extremely important in the game. Not only was it hidden away in museums, locked in a puzzle-locked treasure chest, and that security was patrolling it at all times... I mean, between those three things, I personally feel it's extremely reliable. And yes, while the Marioverse does not commonly dabble in any dimensions aside from 2-D, 3-D, and 4-D, we can't deny that the Marioverse has dabbled in such a topic to begin with. Which proves, at least a little bit, that such a thing can realistically exist in Mario.
It states that the secrets of the Marioverse can be obtained by drinking this soup--and, as you can see, these secrets relate to String Theory due to its name.
And while some would argue that Super Paper Mario's highly controversial, "And in the end, it will consume all existence... All worlds, all dimensions." refers to the common synonym universe for dimension, there is plenty pointing otherwise. Dimension D is the piece of evidence to say they mean universe. What says it means space? Well, Merlon stating that The Void is a hole in the dimensional fabric of space, Bestovius being referred to as a dimensional governor that gives out the dimensional technique, said dimensional technique being one that flips the user between spatial dimensions, and, well, sense itself. Why? "And in the end, it will consume all existence... All universes, all universes..." < I'm sorry, but that just doesn't make sense. And besides, it consumes
all existence and
all dimensions. So, as long as dimensions mathematical dimensions exist within Mario, they'd be erased. And we see that it has mathematical dimensions because of String Theory Soup.
To show you The Void's consumption statement: The Void
consumes all worlds, all dimensions, all timelines (by making it as if those worlds and dimensions never existed at all) and possibilities (erases the future, allowing (Super) Dimentio to create his own).
Here's some direct quotes to show they're talking about mathematical dimensions:
Now, please recall that
Merloo wrote the Light Prognosticus. And he is saying that not even he can stop this prophecy. Of course, he controls dimensions--so Super Dimentio clearly has to be beyond his reach of power--a twelfth dimensional being.
Believe it or not, this is actually backed up by something else. And that something else is backed up be a quote from a page on this very wiki.
Death Manipulation"] The death of the manipulation, as a concept, open wide opportunities. With this, you can
instantly both kill an object and on the contrary,
make it immortal, depriving it of the concept of death. In addition, you can kill even conceptually immortal beings,
if your concept is stronger than the concept of a target. [/quote]
So... Queen Jaydes. Gotta love her, right?
Now, I'm proposing that Queen Jaydes has power over the concepts of life and death, and I'll be matching what she's done to our definition of the manipulation of life and death concepts.
Not only can she instantly kill Paper Mario in a game over (the one I'm proposing is 11-D), but she can also
bring Luvbi back during the post-game, even though such a Nimbi never existed, and was merely a persona of the Pure Heart. And while I do believe it's PIS she could do this,
she still restored life to the Pure Heart.
So, she has the power to both instantly kill a target and, on the contrary, make it immortal.
Now, she stands no chance against Super Dimentio--according to our page itself, in order to not be able to kill someone, they simply must have a
stronger concept.
And what's a stronger concept than higher dimensionality? Merloo supports it, and Jaydes supports Merloo. Heck, the Pure Hearts support it, as they
have infinite power when in comparison to normal characters. This is all very consistent--and, it provides great reasoning for why the Chaos Heart and Pure Hearts were needed. Everything just... adds up.
Finally, to finish why 11-D base Paper Mario characters is valid.
As we know,
Paper Mario tanked The Void. Of course, that thing was consuming all eleven dimensions.
But, that's not all that's important here. Mainly, look at Paper Mario's condition
after The Void.

As you can tell, Paper Mario has been blown back to Flipside--another world, and is temporarily unconscious.
Now, let's take a look at his condition after Dimentio blew him away--to the Underwhere.

And here, Dimentio has blown Paper Mario to the Underwhere--another world, and he is temporarily unconscious.
The similarities between said feats cannot be ignored--Dimentio clearly matched The Void's power, for what it's worth. All four of the heroes can do battle with Dimentio equally, thus, they all scale to The Void; this is why they're
High 1-C in base form. And with their hearts, they're
Low 1-B.
Everything is supported and cleanly backed up. I would also say that, since The Void consumes all dimensions and that there's eleven, then the Paper Mario characters should get
Immeasurable speed as well--for both their base forms and with their hearts, and also because... you know, they're naturally transcendental to a normal space-time.
Finally, to address why I believe String Theory makes it 11-D rather than 10-D or 26-D.
String Theory is divided into different theories. None are referred to simply as "String Theory." Allow me: Prior to 1995, theorists believed that there were five consistent versions of Superstring Theory (type I, type IIA, type IIB, and two versions of heterotic string theory). This understanding changed in 1995 when Edward Witten suggested that the five theories were just special limiting cases of an eleven-dimensional theory called M-Theory (the name behind it is for "membrane," or "mother of all string theories." Any version of string theory, by default, runs with M-theory). Thus, there are five versions of String Theory, all of which are connected to M-Theory. In Bosonic String Theory, space-time is 26-dimensional, while in Superstring Theory it is 10-dimensional, and in M-Theory it is 11-dimensional. Between these three, so we don't wank and so we don't downplay, M-Theory is the safest (and most likely) case the game had been referring to. And considering it didn't specify, simply calling it "String Theory," we would go by the safest and most likely case. In this case, M-Theory. Not to mention that Superstring Theory goes off of M-Theory either way, so we'd need specific statements to call it 10-D instead of 11-D. Which we do not have, unfortunately. This is why I place Mario characters at 11-dimensional rather than 10-dimensional or 26-dimensional.
Finally, I have one more thing to say. Even if we deny String Theory, then The Void is still 2-B. Thus, base characters are 2-B, and thus, Super Dimentio and those who scale are 2-A. The "infinite power" Pure Hearts are backed up by the Prophecies themselves saying that Merloo and Jaydes, two who have supreme powers in this verse, are powerless to stop it.
Also, a lot of Dimentio's powers and backstory is not on his profile. Do you mind if I post that, too?
3. I'm unsure of what you mean by maintain, unless you mean it needs to be consistent? Also,
here's my Star Rod profile, if you need to see it. Should I post the evidence of why I believe the Dream Depot is 2-A?