Well, yeah, there are lot of ways, Emotions can be spurted out, loneliness, then handling our behaviour pattern, and thingies,
you see it is a nice concept since when you are left alone in the world, and atleast in the pokemon world, with almost everyone insane and zombie type, then you'd be surviving every damn day to fend off the baddies and figure the cause, you wouldn't know what you're supposed to do as your daily activities and all that stuff.