I saw that before, get a smeargle with belly drum and baton pass that to magikarp, get it to 1 hp with focus sash and then flail everything to death.
Okay back to rng stuff now! I decided to rng volcarona because I hadn't yet!
Flame Body|lvl. 70|Timid|HP Rock 70
Silver Wind|Quiver Dance|Heat Wave|Bug Buzz