Gluttony

Gluttony allows the user to consume a Berry earlier than usual. Instead of waiting until its HP is low, the Pokémon will consume the held Berry when its HP drops to 50% or less.

That being said, a Pokémon holding a Lum Berry with Gluttony will consume it at 50% HP or less to cure any status condition, rather than waiting until it is fully paralyzed, burned, or poisoned. This isn't particularly useful since Lum Berry should only be used on a status condition! Duh.