Really, a battle. Your not getting this do you. Even if you capture me all your doing is getting a Pokemon. That will never listen to you (no matter how many badges you have) and dooming my sister to a life of loneliness and starvation.
Sure... There's tons of Pokemon out there. Just not me. Look, I have a hatred for humans and that's not going to change. And I have my sister to take care of so I can't just leave her. Me coming with you willingly is never going to happen