@Antvasima
Ok than , again , I can provide episode numbers and time stamps should they be required.
@Pokemon Trainer
Real Solid Vision can produce real effects , Yuya's is no different. The best feat for Yuya's monsters in particular is probably the 4 dragons tearing through the Original Dimension's military while shrugging off attempts at a counterattack-an attribute of Real Solid Vision constructs in general (this took place while they were under Zarc's control but they're still the same cards being materialized by the same tech made by the same man) as well as the stuff Raging Dragon pulled (melting through metal , pillars etc with his wings , blasting through the Academia outer wall alongside the interior wall of the Doktor's lab which was made of metal if I recall correctly etc)
@Sans
All these points have already been covered , just look at the posts above in this very thread. To recap briefly the word universe is repeatedly used (including in it's pural form of universes) , Dark World's sky is filled with stars , Yubel says she'll destroy everything , and the human universe (which is essentially based in part on our own since locations such as Venice are present) is clearly affected by the whole process.
Misawa never said the 12 dimensions used to be one world , his exact quote is "This world has been divided into 12 dimensions" (no where is a continuity of events where there was originally one dimension that was split into 12 at a later point indicated) , it's akin to Yubel's own quote So I than made up my mind. I would try and fill the whole universe , which is split into 12 dimensions , with my love towards you , Judai.
Furthermore , as I pointed out above , the word "world" doesn't necessarily indicate a single dimension , it can indicate anything from a planet to a dimension to multiple dimensions depending on the context of it's use. The context here (all of the above , as well as the point in the very next paragraph) makes makes it clear a single dimension split into 12 pieces is not what we're talking about.
This is the sole new point that I can see. The 12 Dimension's spacetime is almost definitely separate as: a) they operate based on quantum mechanics , their representation on Dr.Zweinstein's machinery is 12 separate squares as opposed to a single big one and c) you need a dimensional distortion to travel between the dimensions ,in fact Dr.Zweinstein says the following:
GX Episode 126 15:42-15:56
Misawa: But how are you sending this transmission ?
Dr.Zweinstein: In the gap between our dimension and the dimension you're all in , we've found a distortion. I'm sending this transmission to you through that distortion.
There's some more pertinent stuff afterwards about how the distortion is small and needs to be widened for Rainbow Dragon (the key to returning Academia to the human world) to be sent through , but the above should sufice. Transportation between the dimensions , or even communication , takes dimensional distortions/portals , it is not something that can be achieved the same way that you would travel to space or communicate with someone who is there. Furthermore , the dimensions can't be the same whole as there is a gap between them.
Finally , as I said to Starkiller/Ender , I don't know japanese so I can't help with gauging translation accuracy (all I can confirm is that the word universe was used repeatedly because the japanese word used is "uchou"). I'm going off the assumption the translated text is , in the least , for the most part accurate and doesn't contain gross inaccuracies that would alter the basics of the plot.
That said . while I personally find the possibility of there being mistranslations gross enough to distort the very basics of the plot rather unlikely (these translations have been around for over 10 years now and have shaped the discussions about GX for as long , the dub agrees with them and it's not like we're talking about some side-episode here , the merging of the 12 dimensions is literally the main plot point of the climax of season 3 ,if the translations were wrong to this extent someone would have noticed) , more detailed understanding of the source material is always a good thing.
@Antvasima
Are there any people on the site reliably good in japanese that we could talk to about this ?