From Bulbapedia, the community-driven Pokémon encyclopedia.
Drash Berry (Japanese: ブーカのみ Būka Berry) is a Berry exclusive to Generation III. It could only be acquired by scanning in the correct e-Reader card in Pokémon Ruby and Sapphire, and if transferred forward to Generation IV will become an Enigma Berry.
In Pokémon Ruby and Sapphire, the trainer will not be permitted to enter the Pokémon Cable Club Trade Center if a Pokémon in his or her party is holding this berry. A Pokémon holding this berry cannot be traded to Pokémon Colosseum or Pokémon XD: Gale of Darkness, nor can it be stored in Pokémon Box Ruby & Sapphire.
Growth and harvest
A Drash Berry will mature from a planted seed to a full-grown, fruit-bearing tree in 72 hours, with 18 hours per stage. A Drash tree will yield 2-3 berries.