The Gorillas are the muscle in Lord Shen's army. If his evil schemes require any heavy lifting, they'll be the ones doing it. Shen's personal guard is made up entirely of these powerful (and powerfully large) brutes, who are honor bound to their master. Two of the gorillas assisting in moving one of Shen's cannons.
In the film, the gorillas performed various duties such as transporting Shen's cannon and guarding Shen and the Soothsayer. During the Battle of the Fireworks Factory, it was a gorilla that battled Tigress one-on-one and prevented her from reaching Po in time to save him from being shot by Shen's largest cannon.
The Gorillas are familiar with kung fu and skilled with weaponry, but they rarely need either. So ferocious and intimidating, they strike such fear in opponents that a battle is often over before it begins. Impossibly strong and amazingly agile, the Gorillas are equally dexterous with both hands and feet and are extremely tough to take down.
- “Hey, on your feet! And wipe those stupid grins off your faces!”
- —A gorilla guard to two wolves knocked out by Po, Kung Fu Panda 2
As members of Shen's personal guard, the gorillas were higher in rank than the wolves, and sometimes led the wolves themselves when Boss Wolf wasn't around.
Even before encountering the Dragon Warrior in real life, the gorillas are noted to have always been legendary, fearsome fighters—so much so that Po had incorporated their likeness into his dream in the beginning sequences of Kung Fu Panda.
The Furious Five
As members of Shen's army, the gorillas were naturally the enemies of the Furious Five and fought them. The gorillas were noted to "pose a surprising challenge" particularly to Tigress, as during the Battle of the Fireworks Factory, a gorilla fought her one-on-one and put up a good fight.
 CG model of one of the gorillas
As the gorillas have little need for armor, their only clothing are armored pants and studded leather wristbands.