Knock Off is a highly valuable Dark-type utility move that removes an opponent's held item upon contact, significantly disrupting their strategy. This item removal is especially potent against bulky Pokémon relying on passive recovery items like Leftovers or Sitrus Berry, as it directly hinders their sustainability and longevity on the field. By denying continuous healing, Knock Off indirectly limits an opponent's ability to set up boosts or maintain defensive presence over many turns, effectively shortening the duration of setup wars. While this utility is broadly applicable, remember Knock Off cannot remove items from Mega Pokémon. Its strategic advantage in item control often makes it a preferred option over purely damaging alternatives, even for STAB or critical hit synergy.