If the user faints, the user’s grudge fully depletes the PP of the opponent’s move that knocked it out.
Effect
If the user is knocked out by an opponent's direct attack (i.e. not by something like poison damage or hail damage) before it uses a different move, Grudge disables the move that the opponent used to knock out the user. The move takes on a "Grudged" status that remains until the end of the battle; even switching the affected Pokémon out will not restore use of the move.
