By enraging the target, the afflicted will not be able to use the same move twice in a row. The Japanese name for this move is “Falsely Accuse”, which would also enrage the target because it’s another way of tormenting. Perhaps this move is a self-defence move that prevents the user from being totally helpless from a certain attack or status move an enemy might use.
Once this move hits, the effect stays until the afflicted switches out. It’s a surprisingly effective move if given to the right Pokémon, because a Pokémon that relies on a specific attack to hit the user hard will find it harder to get to them. Also, when used on a Pokémon under the effect of Encore or a Choice item, they will Struggle if they are supposed to use the same attack they can’t use. While this move is effective at neutering certain Pokémon, the drawback of switching would make it harder to take advantage of. Still, the ability to hit a switch-in with this move still makes it useful to inflict another Pokémon with it.
One of the most notable users of this move is Skarmory
, who can use it to great effect on a hard-hitter like Electivire
, and while the opponent is forced to use another attack, you can use Roost to heal the damage real quick. Liepard is another notable user if coupled with Prankster, because it is the only Prankster Pokémon with both Encore and Torment. Should the opponent stay in, they will find themselves not being able to hit Liepard effectively, because it might create a Substitute if the opponent can attack freely. Fast users who are bulky (and can heal) are quite decent users. I could say Serperior
, but as of now, it didn’t have Synthesis (there is an event Snivy
with this move along with Aromatherapy, but it has a Hardy nature). It might work with Leech Seed, though.
Overall, Torment is a useful move that isn’t really useful due to the environment that favours switching, but if used on an opponent that doesn’t like to be inflicted by it, the advantage is yours.