Villains' might be a bit strong - they’re mostly minor nuisances that either slow down gameplay or give you something to do a couple of times a day, thanks to Team Go Rocket Balloons.
The Team GO Rocket takeover event is back, which means the Team Go Rocket Leaders Arlo, Cliff and Sierra are invading PokéStops in Pokémon Go with a whole new line-up of Shadow Pokémon.