me: ooh long grass yey!system: a wild weedle appeared.me: fck off weedle u suck!weedle: used poison sting.me: *used escape*me: *runs for a pokecentre thats miles away*system: your pokemon have fainted.me: FACK NOOO! THIS WEEDLE OP! D:lesson: never underestimate a wild weedle.
Gen IV and after outside combat poison doesn't faint the pokemon, it wears off and leaves pokemon at 1 HP...