| Type | Power | Accuracy | PP |
| Normal | 100 | 30 | |
| Target | Contact | TM/HM | |
| Both foes | No | -- | |
Leer will lower the opponent's Defense by 1 step on the Stat growth scale.
Leer will always fail if it has already been used 6 times on the same pokemon, without a move that raises Defense being used by or against the pokemon affected by Leer. 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 Defense stat of the pokemon that Leer is used against, the number of steps that it decreases the Defense stat by will count toward the 6 step limit, and reduce the number of times that Leer can be used appropriately.
Leer is affected by Brightpowder when the opposing pokémon is equipped with it.