Gluttony (ability)

Effect

A Pokémon with Gluttony will use a pinch berry when its HP drops to 50%, rather than the usual 25%.

Pinch berries are: Figy, Wiki, Mago, Aguav, Iapapa, Liechi, Ganlon, Salac, Petaya, Apicot, Lansat, Starf, Micle and Custap. (Their descriptions state that they work in a pinch.)

Game descriptions

Diamond​/​Pearl
Platinum
HeartGold​/​SoulSilver
Encourages the early use of a held Berry.
Black​/​White
Black 2​/​White 2
Encourages the early use of a held Berry.
X​/​Y
O.Ruby​/​A.Sapphire
Makes the Pokémon use a held Berry earlier than usual.
Sun​/​Moon
Ultra Sun​/​Ultra Moon
Makes the Pokémon eat a held Berry when its HP drops to half or less, which is sooner than usual.

Other languages

English Gluttony
Japanese くいしんぼう (Kuishinbō)
German Völlerei
French Gloutonnerie
Italian Voracità
Spanish Gula