A boss found in Sea Polluter, has large amount of health, medium damage, and level 12 shockwaves.
To defeat Kory, it is recommended that the player tackles it with very strong and tanky cats such as Baby Cat. Bahamut Cat will not help much as he is easily knocked back; however if you are lucky you he might land a hit and severely damage Kory. Decent range attackers such as Dragon Cat also help, especially when stacked. Spamming weaker cats will not work because they will be killed in the process simultaneously by the shockwaves that also kill your attacking cats faster. Tanky but weak attacking cats (Kotatsu Cat, Tank Cat) will be a burden as they only make Kory create more shockwaves, killing your other cats behind them.
It is easier to deal with the Kory with Dragon Cat stacking when first encountered in Flame Caldera, but it becomes increasingly deadly when backed up by other strong enemies such as Bun Bun Black in Labyrinth of Hades. The Cat Combo, Moby Dick, can really help because Island Cat (or Whale Cat) and Crazed Whale Cat can tank many hits while doing massive damage to Kory; Another good idea is Li'l Lion Cat, since it is immune to shockwaves.