Strength Sap

The user restores its own HP by the same amount as the target's Attack stat. It then lowers the target's Attack stat.

Lowers the target’s Attack by one stage. Heals the user by the target’s current Attack, including modifiers, but not including this move’s Attack-lowering effect. If the target’s Attack is already at -6, this move will fail. In any other situation that would prevent a stat modification, the healing will still succeed.