Ke Ke Ke Pokemon GO Grunt is one of several Team GO Rocket Grunts that trainers will encounter on the map.
When Niantic Labs introduced Team GO Rocket into Pokemon GO, trainers were greeted with a brand new set of missions, challenges, and enemies. The most common of these enemies are the Team GO Rocket Grunts. They are often involved in freeing PokeStops, rescuing Shadow Pokemon, and inadvertently helping trainers find and battle their bosses.
Fortunately, thanks to their uncanny taunts before battle, beating back these Grunts is a simple affair.
Ke Ke Ke Pokemon GO Grunt: How to Defeat the Team Rocket Member
The "Ke Ke Ke" Pokemon GO Grunt's battle team will largely consist of Ghost-type Pokemon. As a result, your team should have at least one strong Dark-type on it. Other Ghost-types are alright as long as they're well-trained and powered-up.
This Grunt's first Pokemon will be Sableye, Shuppet, or Duskull. Their second Pokemon will be Sableye, Banette or Dusclops. Their third and final Pokemon will be Sableye, Banette, or Dusknoir.
Your best counters to this team would be Darkrai, Gengar, or even a partial Ice-type like Weavile. Umbreon works well here, too, as well as Houndoom. Each of these should have at least one move of their specific type. Additionally, trainers should steer clear of Psychic-types for this battle. Ghost-types tend to hit harder against Psychic-types.