Grass/Poison is a dual-type Pokémon classification that combines the characteristics of both Grass and Poison types. Pokémon with this type often have abilities related to nature, such as healing or manipulating plants, while also possessing toxic traits that can inflict status conditions like poisoning on opponents. This type is particularly effective against Water, Rock, and Ground types, but it is weak against Fire, Flying, Psychic, and Bug types. Trainers often use Grass/Poison Pokémon for their versatility in battles, as they can provide both offensive and defensive strategies.