|Shows off the Pokémon's appeal about as well as the move used just before it.|
|The user drains the target's energy with its horns. The user's HP is restored by half the damage taken by the target.|
Horn Leech does damage to the target, then restores the user's HP by up to half the damage dealt to the target. In a Double Battle, Horn Leech can target any Pokémon around the user. In a Triple Battle, Horn Leech can only target a Pokémon that's adjacent to the user.
By leveling up
|Trevenant||ghost/grass||1, 62||1, 54|
| Bold indicates this Pokémon receives STAB from this move.|
Italic indicates an evolved or alternate form of this Pokémon receives STAB from this move.