>>31346346(F)ocus Sash + (E)ndeavor + Quick (A)ttack + (R)attata. Basically you use a level 1 shitmon with a focus sash, endeavor and quick attack.
The idea is that the opponent attacks you and you hang on to the focus sash, you then use endeavor to reduce your opponent's pokemon to 1 HP, then kill it with Quick Attack. This strategy however doesn't account for billions of situations that break it and it's mostly noob bait