These kinds of moves are fun against human trainers on Smeargle. Something like,
Spore, and use Mind Reader, the human opponent will switch, Pursuit on the switch. Fun, fun, fun. Next turn you do the same, Spore, and then Mind Reader, the opponent thinks he won't fall for the trick again and doesn't switch, Sheer Cold. OHKO. Fun, fun, fun. Just use Pusuit and Sheer Cold randomly after Mind Reader after this.
Master balls are the cheapest thing ever invented. It's more fun catching everything with balls that can fail. 'caught Latios in the wild without master ball ftw'