You can unlock it in Training Camp (tutorial)
Single target, meele troop with moderate hitpoints.
He can be used to take down buildings very fast if it’s not being attacked.
Combination with Giant is great because the take oncoming hits and the Mini P.E.K.K.A. can deals damage.
Take cover before lower hitpoints units like Goblins or Skeletons. You can also use them to counter Mini P.E.K.K.A.
Pair him with a Valkyrie. She can cover him before low units and him will cover her before high hitpoints units.