- Gold/Silver/Crystal: Boosts Attack but causes confusion.
How To Obtain
• This item cannot be bought in shops in-game on any generations and game cartridges.
• This item can be traded between Gold, Silver, and Crystal games, provided the Pokémon being traded is holding the Berserk Gene as its item and both game cartridges can trade back and forth.
- Gold/Silver/Crystal: The Berserk Gene can be found in Cerulean City where the entrance to Cerulean Cave would have been. It is found in the lake near the cave.