The Petaya Berry is a rare berry. If held by a Pokémon, the berry will raise the holder's Special Attack by one level when the holder's HP reaches 1/3 or lower. You can obtain the Petaya Berry at the following events: Tanabata 2004 (Held by Jirachi) Tanabata 2005 (Held by Jirachi) Nintendo of Korea (Held by Deoxys) Pikachu Cafe (Held by Tangrowth)