would probably be better to link pokemon to climate region rather than a super general list
also some places seem to be special like University of California Berkeley where you can find like over half of the common/very common pokemon in just that one region. in fact, i dare say all the very common to uncommon (and maybe even rare) pokemon can be found there, from my experience wandering around the college campus, plus the pokemon that show up in the hotly contested gyms there.
could be because the maker is a UCB alumni so a bit of favoritism, perhaps.