>>32337871Sneak up, hit with something to knock him out, steal the Pokemon, throw him into a river to get rid of the body.
If he sees me sneaking up, just go back out and try again a while later. I would be wearing a mask or something to cover my face, so the Pokemon doesn't think of me as a bad guy when he sees me. Lie to Pokemon that his faggot was attacked by some robber or something, and keep him with me from that point onward, taking care of him as his Trainer.