Tilling the soil, the user makes it easier for plants to grow. This raises the Attack and Sp. Atk stats of Grass-type Pokémon.
Rototiller raises the Attack and Special Attack stats of all grounded Grass-type Pokémon on the field by one stage, except those that are in the semi-invulnerable turn of a move such as Fly or Dig. Rototiller fails if there are no eligible Grass-type Pokémon.