Leech Seed is a Grass-type move introduced in the Pokémon series. When used, it attaches a seed to the target, draining their health over time. The user recovers half of the damage dealt, making it a strategic choice in battles for sustaining health. This move can be particularly effective against opponents with high health or those that rely on physical attacks. Leech Seed can also be used to weaken opponents while providing support to the user's team. It is commonly associated with Pokémon like Bulbasaur and Gloom, which can learn this move early in their development.