Oogway became fascinated by this energy and learned from the pandas how to use it by giving Chi to others, but Kai was only interested in increasing his own power with this energy and learned from the pandas' teachings how to use it by taking Chi from others rather than give it.
In Po's first memory in , Po's mother was seen abandoning him, which caused Po to begin questioning his past.
Later in the battle, Storming Ox and Croc joined in, along with Shifu, who had traveled to the city after sensing Po's near-death-experience.