Grass-Whistle is a Grass-type move with no power and 55% accuracy. It induces sleep on the target, making it a valuable move for disabling opponents despite its relatively low accuracy. Grass-Whistle is often used strategically to create opportunities for setup or to interrupt an opponent's momentum. Its effectiveness can be boosted by the Ability "Serene Grace" or the use of the item "Wide Lens" to improve accuracy. However, due to its low accuracy, it is generally considered a high-risk, high-reward move in competitive play.