| Type | Power | Accuracy | PP |
| Poison | 40 | 100 | 30 |
| Target | Contact | TM/HM | |
| Both foes | No | -- | |
After damage is dealt, Acid has a 10% chance of lowering the opponent's Defense stat by 1 step on the Stat growth scale.
Also, like all damaging moves that strike both opposing pokemon in a Double Battle, each individual pokemon takes 1/2 the damage they would if Acid was used during a normal battle. This makes the attack's power effectively 20 during a Double Battle.
Acid is affected by Brightpowder when the opposing pokémon is equipped with it.