A seed is planted on the opponent. It steals some HP from the opponent every turn.
Effect[]
In battle[]
A seed is planted on the target. In Generation I, the seed drains the target of its HP by up to the amount of HP that makes up 1/16 of its max HP, then transfers it to the user. As of Generation II, the seed drains the target of its HP by up to the amount of HP that makes up 1/8 of its max HP, then transfers it to the user. The target will continue to be drained on every turn until it faints or it switches out. In a Double Battle, Leech Seed can target any Pokémon around the user. In a Triple Battle, Leech Seed can only target a Pokémon that's adjacent to the user. Leech Seed will fail if used on grass-type Pokémon or Pokémon that are already seeded.