I'm just going to open this thread temporarily to give my thoughts on it so this won't be brought up again. Alot of these feats and claims are borderline speculation and doesn't not support the tier that was propose. Many of them are based from the aesthetics change of the background or opening a rift, neither which are a valid or supports that the characters are tier 2. I'm going to address these games one at a time to get this cleared:
SMG games: The worlds in SMG2 are not universes. They are different sections of the universe. I already addressed this in the calculation of Grand Star-powered Bowser and Starship Mario's speed. And just because the Grand Star can open portals of time and space, does not mean they are Multi-Universal. Everything in thoses games are Low 2-C because everything takes place in a single universe. Period.
SMRPG: Destroying Star Road =/= Universe . Exor did not effect the moon or tens of stars. He simply destroyed Star Road in order to prevent the wishes from the world from reaching the area, thus making wishes never coming true. And I had this discussion about Culex with a senior member of this wiki. It's agreed that the statements on his powers, official and self-stated alike, were not enough to make him Low 2-C. I didn't think so at first but that's how it is considering other characters in this wiki faced a similar situation.
Luigi's Mansion: Dark Moon: No. This has been the only time King Boo has performed such as feat in his long history in the series and it's out of the blue. The tier should be limited to the ability and not the character or those who fought him. The only change I'm willing to make is the Paranormal Portal being Low 2-C rather than 3-A since the paranormality is affect the reality of their dimension.
Mario and Luigi: Dream Team and Paper Jam: Bowser never fought Antasma and the latter never had the dream stone. None of these ratings will be applied to them. Simply opening portals and rifts does not make a person Universal. The only valid point you brought up was Antasma's flipping the entire Dream World upside-down(Not time/space) during the fight against him. I may need to think about that one. But for now, the stats remains unchanged. And the backgroung in Paper Jam's final battle is pure aesthetics only. It has nothing to do with Shiny RoboBowser or the plot of the game whatsoever. Even if it did, there's nothing supporting that the entire universe was affected. For all we know, it's only the sky and nothing else. This is pure speculation and a very weak one at that.
Mario and Rabbids: Kingdom Battle: I already discussed this with Metal about this. I'll copy and paste what I said: I seen a decent among of cutscenes of the game and I don't recall two universes being merged at all. It seems more of the case that only Mario's universe is affected as the game is solely focused on making things back to normal in his world and nobody is concerned about wether other dimensions are affected. In fact, when the Rabbids travelled to Mario's world, their world after they left seems fine. If anything, it's a Low 2-C feat and not 2-C.
So after all this, the only change of the existing pages that will be taking place is the Paranormal Portal ability being changed from possibly 3-A to Low 2-C. King Boo, however, will not scale to the feat itself. And I already explained the Rabbids + Kingdom Battle in other threads before commenting on this one.
So please, enough of these ridiculous threads that amounts to nothing. If I have to be honest, all it does is make everyone believe that the people who support this franchise are full of wankers and at this point, I don't blame them for thinking such. I'm getting tired of people trying to upgrade the characters of this verse through absurd means or simply trying to make them what they never were or intended to be just because we highly favor this franchise. Truth to be said, this verse was never meant to show-off how strong the characters are. It's not all "In your face" like other verses are. The prority of the franchise and it's means of entertainment is gameplay and innovation above everything else. It just so happens that after 30-years of Nintendo building the world and expanding it's lore, it ended up to be a surprsingly powerful series thanks to certian games in the franchise. So let's stop boosting this verse into what it is not and I wish to never visit this again. Also, and this goes for everyone involved, I would like to ask to drop the excessive amount of match-up threads involving these characters and the verse as a whole. Seriously, they are getting boarderline ridiculous and I know some people on this wiki are tired of constantly seeing them in their activities list. I'm not into match-ups in the slightest but I know when there's too much of them when I see it. Let's stop overhyping this franchise please. It's just unintentionally going to diminish it's rather consistent quality.