Originally Posted by Fat ΩDonut
It will activate part-way through, yes. Showdown is bugged in that regard.
Alakapimp just found out that if you Encore a Tormented Pokemon into using the same move it used last turn, it will NOT fail and work as normal.
Have you tested this the other way round, i.e. if a pokemon is encored and then tormented, what will happen? It's just that if I recall correctly (and this may or may not be relevant) on shoddy battle in gen 4, it would work one way round but not the other.