how about a gun that just freezes them. doesn't kill them, doesn't harm them, but you can shoot other weapons at them while theyre frozen and then kill them.

Credit to Ace Of Spades 117 for the Avy and pokemonruler for the sig.
Diamond FC: Scooter 0387 6037 1075Battle record with new team: 17-3Number of EV Trained pokemon: 47