Originally Posted by Fat jonathanrp
You could usually lead with a Dragon Tail 'mon
usually BP people ragequit the instant ninjask's recipient gets dtail'd out
That's not foolproof against a good BP team though. You basically need a Dragon with >120 base Attack or offensive Groudon to be guaranteed to break a 252/252+ Ninjask's sub. Plus, if Ninjask just spams Sub+Protect, there's a ~40% chance at least one of five Dragon Tails misses.
Outside of Haze or Perish Song, the best bet is to have a mon with something like Roar or Taunt that also has the potential to take out Espeon if they choose to switch it in.