"It dances a mysterious rhythm. It makes the opponent copy & makes both of their abilities the same."
It makes your opponent have the same ability as you. But these are the only pokemon that can learn it so far:
Buneary (Run Away/Klutz/Limber)
Lopunny (Cute Charm/Klutz/Limber)
Tabunne (Healing Heart/Regeneration/Klutz
Hahakurimo (Swarm/Chlorophyll/Dust Proof)
Churine (Chlorophyll/Own Tempo/Leaf Guard)
-Doredia (Chlorophyll/Own Tempo/Leaf Guard)
using it with Aianto sounds pretty promising if it has truant though. You could Give your opponent's entire team Truant just to be a jerk. But I'm not sure if it's like skill swap or synchronize in that its effect still applies after your opponent switches.