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When the wielder attacks a Pokemon with a contact move, there is a 30% chance of the target becoming poisoned. Poison Touch is considered a secondary effect for the purposes of Shield Dust and is prevented by Safeguard and Substitute.
Can be useful for Muk, but Seismitoad and Toxicroak have better options. Low effect chance makes it very shaky, and the effect is only regular poison as opposed to Toxic poison, making Poison Touch an inferior choice of ability.
Found in Dream World