During the years that Shang Tsung sponsored the Mortal Kombat tournaments on Earth, the Outworld master Bo' Rai Cho was secretly training warriors for competition. It was even speculated that it was he who brought the fighting style of Drunken Boxing to Earthrealm. After many years, he finally discovered the Shaolin monk Liu Kang and taught him the martial arts moves he needed to defeat Shang Tsung. Later, with the tournament securely in the hands of the Shaolin, his teachings were no longer needed and he returned to Outworld.

Bo' Rai Cho looked gruff, but beamed inwardly. With their victory over the Deadly Alliance complete, he and Kung Lao had liberated Outworld from its latest threat. Despite the years that had passed since training his last student, his skills had proven useful once more. He was elated, but it would be most inappropriate to express such emotions in front of his newest apprentice. Kung Lao invited his master to return with him to Earthrealm, to teach more warriors at the Wu Shi Academy. The success of his apprentice gave him renewed confidence in his training skills and, for the first time, a clear purpose in life. Bo' Rai Cho offered only token resistence. He accepted the offer because the defenders of Earthrealm could certainly use his help. But more importantly, because Earthrealm's rice wine put Outworlds liquor to shame.