BfA Pet Battles: Unbreakable

The pet battle is located in The Wailing Tideway, Tiragarde Sound (88:80) and defeating him is part of the achievement Battle on Zandalar and Kul Tiras.

In this fight you need to defeat Chitara.  Chitara is a beast pet with a buff called Unbreakable Shell. With this buff Chitara's shell grows more brittle every time it takes damage.  Damage taken is reduced by 100% until 5 attacks are made against it.  Chitara is good against critter and poor against flying. 

The team I used for this is:
          Ikky (1,1,1)

          Clockwork Gnome (1,2,1)

          Olive Tail Hare (2,2,2)

Battle: Start with Ikky and use (2) Black Claw and then (3) Flock before swapping to the Clockwork Gnome.  Use (3) Build Turret on cooldown and (1) Metal Fist as filler until the gnome is dead. Switch back to Ikky and use (3) Flock until Chitara is dead.  The Third pet was not needed.

After checking chat many people defeated this pet battle using a three moth technique with Moth Balls as the soul attack. Anything with a multi attack like Flock, Moth Balls and Flurry will dispatch the shell quite quickly and after that Chitara has fairly low health.