Kyle
You hold out your Pokeball for the Gengar, and he gives you a decidedly unfriendly look. Undeterred, you tell him that you could really use a Pokemon like him on your team. The unfriendly look persists. Finally, he says something: "Okay, look, guy, I won't just go with any old trainer who wanders down this way with a Pokeball. I'm a pretty big fish around these parts, and if you want to have the privilege of travelling with me, you gotta beat me first." He adopts a fighting stance. What do you do?