Master Bear's village was attacked by Kai's jombies, so he, along with Masters Croc and Chicken, went to investigate to a deserted river bed. They were soon joined by Masters Crane and Mantis. The group approached Kai and battled him, but were defeated and had their chi stolen, turning them into jombies.
Later, as a jombie, Bear attacked the panda village, but was held back by Po and the other pandas.
Along with all other living masters, Bear was freed from his enslavement once Kai had been vanquished. Following his release, he, along with Masters Croc and Chicken, learned how to give chi, taught by Po.