|The user faints when using this move. In return, this harshly lowers the target's Attack and Sp. Atk stats.|
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 if it has no target or is blocked by substitute), if the target is immune (such as due to being Dark-type when Memento is boosted by Prankster in Generation VII), or if it is blocked by a protection move. However, the user will faint even if Memento is unable to affect the target's stats (such as due to Clear Body or if both stats are already at -6).