I'm not sure if this was brought to attention, but I didn't see it in the OP; Knock Off doesn't remove the opponent's item if the user faints. For example: My Landorus-T uses Knock Off on a Ferrothorn who is holding a Rocky Helmet. My Lando faints because of all the damage done by Iron Barbs and the Rocky Helmet, but it doesn't remove the item from Ferro. If this mechanic (if I can call it that) works the same if one would faint trying to remove hazards, disregard this. Or at least it should be mentioned in the OP.