The
Kun-Lai Runt is, without doubt, a pet KILLER. As the name implies, you can find them in the Kun-Lai Summit in Pandaria. Look in the mountains in the southwest. One would think, by looking at the
Kun-Lai Runt that it would be a beast, but it is humanoid! Humanoids are naturally resistant to attacks by critters and this humanoid's default attacks are beast abilities, which dishes out additional attack damage against any unlucky critter it encounters.
I would suggest you begin your encounter with
Mangle. It is a Damage Over Time (DOT) ability that causes up to 48 damage at level 25 against one foe for 10 rounds. But if you are encountering a particularly powerful creature, you might skip the DOT and go right for the muscle, the
Rampage ability. It acts like a channeled spell only you can't stop the channeling once started. The spell lasts over 3 rounds and delivers up to 406 damage at level 25 each turn plus any critical strike damage, enough to clean out the energy of even the most stout opponents. If your opponent still is not dead after those first rounds, use the
Thrash ability which strikes 2-3 times per round at up to 162 damage per strike at level 25 plus any critical strike damage. You only get a third strike if your pet is faster than the opposing pet, which is not likely unless you replace
Mangle with the
Frost Shock ability reduces your foe's speed by 25% for 4 rounds. With 1465 health and strong defenses against critters, it's extremely unlikely that your critter foe will survive your critter-killing attacks.
There are a couple hidden advantages to this pet, more specifically applicable in pvp where certain abilities such as stunning and weather can play a more significant role and should impact your choices in creating teams. Teamed with a pet like
Tundra Penguin with the
Slippery Ice ability, which increases the foe's chance to miss by 25% and persists through pet swaps, the
Kun-Lai Runt's
Deep Freeze ability increases the odds of stunning the foe from 25% to 100%! If you happen to be able to stun your foe, it's
Takedown ability will double it's normal damage of 292 at level 25; add a critical strike to that and you have a devastating blow!