Second point, not necessarily. Puzzle Bobble has more boots than a lot of other MVS carts.
True, that's probably the most often faked MVS game, along with SVC Chaos. I just meant for genuine carts that if it has an original label saying "PUZZLE BOBBLE" that it can't be a NA version. If it's real but has a fake label, then it's basically impossible to tell where it came from.