That didn't take long. Mere days after leaks hinted that Pokémon Go would get more monsters, Niantic and The Pokémon Company have rolled Ditto into the game. The critter is a shape-shifter that won't reveal its true form until you capture it -- in other words, the only reliable way to capture a Ditto is to keep playing until you find one at random. In the Gym, it'll assume the looks and abilities of the first creature it sees and stay that way throughout other battles.