Yes, they are popular. People who have no skills and want easy wins love using pranksterswag- literally just win by luck. Seriously, fuck pranksterswag. The team can become really balanced, as people above me have mentioned: put in a Ditto, use Attract on the pranksters, and watch your opponent struggle to hit you with less than god knows how many percent chance.Are they really that popular as to make sure you always have to consider it when building a team? I guess we should see if klefki/liepard/sableye usage has gone up this month. I don't think is THAT popular.
You bet I'm angry, I just met three prankster swag teams in a row and that dropped my hard earned ranking points by a hundred. If this keeps going I'm going to sac a member of my team just to put in Sylveon or Blissey. It's not good for my temper.