Grass Knot is a Grass-type move with variable power and 100% accuracy. Its power depends on the weight of the target Pokémon; heavier targets receive more damage, ranging from 20 to 120 base power. Grass Knot is especially effective against heavy Pokémon like Snorlax or Groudon. This move does not affect Grass-type Pokémon in key generations, and it deals physical damage but is classified as a Special move. Grass Knot is popular in competitive play for its strategic use against bulky, heavy opponents.