Memento is a stat-lowering Dark-type move.
Memento causes the user to faint and in return lowers the Attack and Special Attack stat of the target by two stages each.
The user will not faint if Memento fails, such as when blocked by Protect or Substitute or if it has no target. However, the user will faint even if the target does not have its stats lowered, such as if the target has the Ability Clear Body or is protected by Mist.
Pokémon that learn Memento
By leveling up