Swalot [SM - Celestial Storm]

[1] Amnesia (30)
Choose 1 of your opponent's Active Pokémon's attacks. That Pokémon can't use that attack during your opponent's next turn.

[2P] Swallow Up (40+)
If, before doing damage, your opponent's Active Pokémon has less remaining HP than this Pokémon, this attack does 80 more damage.