>>54875087SV DOES have a regional mark, you fucking numpty, it's the Tera symbol. they don't seem to use region marks to exclude pokés from VGC any more though, hence your confusion.
And in case you forgot, there's been a lot of kids born and grew into pokémon in time for SV's launch. They have no legendary collections, why wouldn't Game Freak add them to the rehash replacement, when they've always added them into the last game of a Generation or last core gameplay game (in the case of USM) for kids to collect them?