ah yes, one of the reasons i stopped visiting serebii's forums
they hardly ever work
where has it ever been stated that kalos was anywhere near the other regions? even in the anime ash had to get there by plane & we can only guess at how long that took.
lets go by what each region is based on
kanto, johto, hoenn & sinnoh are based on parts of japan.
unova is based on NYC
orre is based on phoenix, arizona
Lt surge clearly states he's a member of the united states army, so there probably a usa region with arizona & NYC not existing in it. well, either that or theres 52 regions linked together as a country or alliance of some sort that acts as a parallel to the real life usa.
and mew was first discovered in south america
so odds are there are some regions which have the same name as their real life parallel.
it's not like video games, anime & manga haven't done the same.
and finally kalos which is based on france & jersy.
france is no where near japan nor the usa in irl.
additionally, it takes 11 hours 45 mins to get from paris to tokyo
so i highly doubt any of the other regions are anywhere near kalos.
it was stated that Fantina is not from sinnoh, hoenn, johto, orre or kanto & was from a region that spoke french.
gen 6 was foreshadowed in gen 4.
odds are kalos & unova where planned years before their release. i wouldn't be surprised if ninteno already has a template for gen 8 laid out.
that's right, i said it: gen
eight. the pokedex number might reach a 1000 with that gen.