Houndoom KO's Gengar, Metagross, and Scizor, and with the right moves Swampert. Infernape could KO Porygon2, Togekiss, Metagross, and Scizor. Grass type like Venusaur or Breloom could ko Metagross, Swampert, Porygon2. As you can see it can be devestated with three Pokemon