>>38330332Partially the juxtaposition of well-written moments to evoke certain emotions along with the innocence of pokemon in general.
Consider rescue team, at the point where you are forced to flee as refugees. That moment in game when you realize that you can't do anything to stop them from coming after you is a perfect example of evoking betrayal, disgrace, and indignation in the player, watching his old friends and allies preparing to more or less kill him to save the world. You then go through more and more desolate areas until you're in a frozen wasteland, the epitome of the loneliness and abandonment, only further exacerbating the emotions from before.
You can also consider explorer's ending as a brilliantly done evocation of bitter nostalgia, being forced to watch your partner return home after you die, seeing all the cutscenes in reverse but without you, then all the flashbacks to key moments of growth in your adventure while your partner's on the beach where he found you. The jaunty, "adventure continues" music of the credits then takes on a completely different affect than it would if it were listen to out of context - instead of being a call to adventure, its like a farewell to the adventures you had, a final sending off to your passing.
And all this shit is happening to fucking pokemon on top of it all