| Type | Power | Accuracy | PP |
| Steel | 85 | 40 | |
| Target | Contact | TM/HM | |
| Any one target | No | -- | |
Metal Sound will lower the opponent's Special Defense by 2 steps on the Stat growth scale.
Metal Sound will always fail if it has already been used 3 times on the same pokemon, without a move that raises Special Defense being used by or against the pokemon affected by Metal Sound. This is due to the fact that a stat may only be lowered by a maximum of 6 steps, until it is reset by the use of Haze or the pokemon is switched out normally. The maximum is the limit of how many decreases can be applied to a stat. If another move decreases the Special Defense stat of the pokemon that Metal Sound is used against, the number of steps that it decreases the Special Defense stat by will count toward the 6 step limit. This will not reduce the number of times that Metal Sound can be used unless the decrease is by at least 2 steps. The decrease will still max at 6 steps, so Metal Sound will only provide a 1 step decrease if there are already 5 steps of decrease in effect.
Metal Sound is affected by Brightpowder when the opposing pokémon is equipped with it.