Grass-type moves are a category of attacks in the Pokémon games that deal damage and have various effects based on the Grass element. These moves are particularly effective against Water, Ground, and Rock-type Pokémon, while they are weak against Fire, Flying, Bug, Poison, Ghost, and Steel types. Many Grass-type moves can also inflict additional effects, such as healing the user or causing status conditions like sleep or paralysis. Some popular examples include Solar Beam, which is a powerful attack that requires a turn to charge, and Giga Drain, which allows the user to recover health based on the damage dealt.