...anyways, i have came up with a potential idea of doing this. By making CT for mk7 wich maybe could work. Now, after i have looked in at creating CT, i noticed a few things:
1: a 3DS indeed doesn’t rely on resolution, but trisses and polygons.
2: A 3DS can only handle up to 4000 poly’s and 10000 trisses at once (though, its recommend to use up to 5000 (i have asked the CTGP-7 community))
3: this must be possible since mario kart ds deluxe can do this (now i know that MKDSDX is not the best rom hack, but this shows off something)
so, indeed, you guys were right about almost everything, i just didn’t understand shit when i started this thread (i should have researched a bit before, im an idiot), atleast, im working on this now, and i am gonna try finishing this. (Ofcourse this is not easy, but im gonna try my very best), i hope i can share it one day.