You can unlock it in P.E.K.K.A. Playhouse (Arena 4)
Single target troop with high hitpoints and massive damage to one unit at a time.
Very powerful troop with destructive attack in the right place.
To destroy him you can use Skeleton Army or Minion Horde. He become outnumbered and destroyed.
To protect him you can use Arrows or other area damage units. Wizard or Bomber can help also.
He can attack only ground troops so be aware of flying troops. You can also use flying troops to destroy P.E.K.K.A.
Use the Rage Spell to boost P.E.K.K.A.’s movement speed. He can reach towers much faster.
Effective in destroy units like X-Bow.
Great counter for the P.E.K.K.A. is the Inferno Tower. Tower have ability t deal massive damage over time and can completely destroy the P.E.K.K.A.