After the army had been informed of the decision to leave this dimension and those that didn't want this left, Robin started bringing his plan to life. With the help of Giratina, a large portal appeared above each island, taking a few chunks of land from each of them to the distortion world. While having flying types safely escort those that remained on those chunks safely back to the ground, of course. Robin also sent a few newly recruited Volcarona in to take turns at being the sun of this world.
This will cause some panic... But it's definitely for the best.
"If you can find money to kill people, you can find money to help people." Tony Benn