Berserk Gene

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Berserk Gene
Destructive Gene
Bag None Sprite.png
Berserk Gene
Pokémon Global Link artwork
Introduced in Generation II
Generation II Bag Items pocket icon.png Items

The Berserk Gene (Japanese: はかいのいでんし Destructive Gene) is a type of consumable held item exclusive to the Generation II games.

In the core series games


Games Cost Sell price
GSC N/A PokémonDollar.png100


151Mew.png This move effect may be in need of research.
Reason: How long it confuses the holder in Stadium 2.
Does the confused Pokémon replacement glitch occur in Stadium 2

You can discuss this on the talk page.

Confuses the holder for a duration of 256 turns and raises its Attack by 2 stages as soon as it enters battle. It is consumed upon use.

The Berserk Gene is consumed even if the holder is already confused or already has +6 Attack stages when it enters battle (due to Baton Pass). If a confused Pokémon is switched out and replaced by a Pokémon holding a Berserk Gene, the holder will be confused for the remaining duration of the first Pokémon's confusion, rather than for 256 turns.


Games Description
GSC Boosts Attack but causes confusion.


Games Finite methods Repeatable methods
GSC Cerulean City (former Cerulean Cave entrance)

In spin-off games

Detective Pikachu

Spoiler warning: this article may contain major plot or ending details.

In Detective Pikachu, the Berserk Gene is referenced several times as part of the drug known as R, which can momentarily make Pokémon more powerful, but also causes them to become berserk. Its effects derive from Mewtwo's cells and the Berserk Gene within them.

201 Spoilers end here. 201


  • In the game data of Pokémon Gold, Silver, and Crystal, Mewtwo is defined to always hold a Berserk Gene when encountered in the wild. However, Mewtwo cannot be encountered in the wild in these games, so this data is unused.
    • Even if Mewtwo could be encountered in the wild, the Berserk Gene would be consumed immediately, so the player would not be able to obtain a Berserk Gene from wild Mewtwo.

In other languages

Language Title
Chinese Cantonese 破壞基因 Powaaih Gēiyān *
破壞性的遺傳因子 Powaaih-sing dīk Wàihchyùhn Yānjí *
Mandarin 破壞基因 / 破坏基因 Pòhuài Jīyīn *
破壞性的遺傳因子 Pòhuài-xìng de Yíchuán Yīnzǐ *
France Flag.png French ADN Berzerk
Germany Flag.png German Berserk-Gen
Italy Flag.png Italian GenefuriosoGSC
Geni della distruzione*
South Korea Flag.png Korean 파괴의유전자 Pagoe-ui Yujeonja
Spain Flag.png Spanish Gen Loco

External links

Project ItemDex logo.png This item article is part of Project ItemDex, a Bulbapedia project that aims to write comprehensive articles on all items.