Corruption (Ability)

Corruption is an Ability. It is the signature ability of Forbeden, and original to Pokémon Beryl.

Effect
Corruption changes Forbeden's form. Its default form is the Pure Form (high defenses), and when it is struck by a move that makes contact, it will shift to its Sinful Form in rage. In Sinful Form, Forbeden exchanges high defenses for higher offensive stats, in addition to obtaining the Dark-type.