Ability₂₁₄-Seed Sower

When a Pokémon with Seed Sower is hit by an attack, it summons Grassy Terrain for five turns, unless Grassy Terrain is already present.
⚠️This can be extended to 8 turns if the Pokémon is holding a Terrain Extender.
⚠️If hit by a multi-strike move, the first strike will activate it.
⚠️Seed Sower activates before the effect of Steel Roller and Ice Spinner is triggered, thus removing the Grassy Terrain.
~Bulbapedia