Zhu Bajie (literally "Pig of the Eight Prohibitions") is also known as Zhu Wuneng ("Pig Awakened to Ability"), and given the name Pigsy, Monk Pig or just simply Pig in English.
Once an immortal who was the Marshal of the Heavenly Canopy commanding 100,000 naval soldiers of the Milky Way, he drank too much during a celebration of gods and attempted to flirt with the moon goddess Chang'e, resulting in his banishment into the mortal world. He was supposed to be reborn as a human, but ends up in the womb of a female boar due to an error at the Reincarnation Wheel, which turns him into a half-man half-pig monster. Zhu Bajie was very greedy, and could not survive without eating ravenously. Staying within the Yunzhan Dong ("cloud-pathway cave"), he was commissioned by Guanyin to accompany Xuanzang to India and given the new name Zhu Wuneng.
However, Zhu Bajie's indulgence in women led him to the Gao Family Village, where he posed as a normal being and wedded a maiden. Later, when the villagers discovered that he was a monster, Zhu Bajie hid the girl away, and the girl wailed bitterly every night. At this point, Xuanzang and Sun Wukong arrived at the Gao Family Village and helped defeat him. Renamed Zhu Bajie by Xuanzang, he consequently joined the pilgrimage to the West.
His weapon of choice is the jiuchidingpa ("nine-tooth iron rake"). He is also capable of 36 transformations (as compared to Sun Wukong's 72), and can travel on clouds, but not as fast as Sun. However, Zhu is noted for his fighting skills in water, which he used to combat Sha Wujing, who later joined them on the journey. He is the second strongest member of the team.
Read more about this topic: Journey To The West, Main Characters