When used from theBag on awild Pokémon, it drastically increases itscatch rate. The effect wears off if and when the wild Pokémon breaks out of a thrownPoké Ball.
The Golden Razz Berry was added toPokémon GO on June 22, 2017. It can be used to makewild Pokémon significantly more likely to be caught, adding a ×2.5 multiplier to thecatch rate. The Berry's effect lasts until the Pokémon breaks out of a thrown Poké Ball.
If a Golden Razz Berry is fed to aGym defender, it will completely fill a Pokémon's motivation, regardless of how many Berries it has already eaten.