Knock Off is an offensive Dark-type move.
If this move is used on a Pokémon that is holding an item that can be lost, it will deal 50% more damage. Knock Off will not remove a held item if the user faints due to Rough Skin, and cannot remove a Mega Stone.
As of 1.1, it can be taught by the Physical Move Tutor in Tsukinami Village Hotel at a price of four Red Shards. Prior to 1.0.4, it could be taught by the Ultimate Move Tutor in Tsukinami Village, at a cost of 4 of each type of shard.
Pokémon that learn Knock Off
By leveling up