I love this question. It happens at two places. It happens at the International Dateline, in a sense. At the dateline, it is ALWAYS one day on one side, and another day on the other side. It also happens at "midnight", as midnight moves across the planet's surface each day.
That doesn't necessarily happen. Temperatures can change from one day to another, and sometimes there can be a big change.
air masses
It is the movement of air masses.
air masses
air masses
not, you have to wait until the next day to change the swarming Pokemon and its route.
air masses
air masses
air masses
air masses
air
air masses