Peng was rumored to have haled from a valley over from the Valley of Peace, where he spent much of his life learning pottery from his family. At some point in his life, however, he grew more interested in Kung Fu and became a big fan of it, but since he had no formal training, he eventually leaned the martial art for himself. By the time he was a teenager, Peng left his hometown in search of his uncle Tai Lung, though it was unknown of how much he knows of his uncle or if he was aware of his atrocity against the Valley of Peace.
The Kung Fu Kid
When Peng arrived in the Valley of Peace, he signed himself up to partake in the Peace Jubilee. Someone proposed that he should fight Jing Mei, the nephew of Temutai, who was one of the masters hosting the celebration. Peng was at first hesitant until Jing Mei knocked down his pottery cart, and agreed to the fight. He introduced himself to Master Shifu and assure the Dragon Warrior, Po, that he wanted to fight. When the match began, Peng first evaded Jing Mei's attacks but then countered one and finished the fight with three airborne spin-kicks, easily winning the match. But before he could take his leave, both Po and Temutai tried to convince him almost turning into a fight until Shifu declared it was Peng's choice. The young snow leopard decided to train with Po at the Jade Palace, but on their way there, he was mobbed by a group of children who became his new fans and signed autographs before at last he was taken to the Training Hall. There, he met and was complimented by the Furious Five, who offered him a run through the training course, which he traversed in seconds flat. At dinner, Peng sat at the head of the table (where Po was supposed to be sitting as host) and told some jokes, succeeding in making Tigress laugh.
Later, he met up with Po in the Training Hall again, where the Dragon Warrior haltingly told Peng that Shifu had dismissed the young potter's skills as a warrior. This outraged Peng, who declared he'd prove Shifu wrong before running off. He sought out Temutai and told him what happened before picking up a sword, proclaiming he would defeat the Qidan Clan leader and show Shifu what real strength was. The fight continued outside and before long, everyone (the Furious Five, the Qidan Warriors, and the villagers) were all fighting and squabbling until Po shouted for everyone to stop. It was there that the panda confessed that it was he who wanted Peng gone, not Shifu, because he got jealous of the leopard cub's popularity, and sincerely apologized. Though shaken, Peng found it in his heart to forgive Po, and partook in the closing ceremony with Po and Temutai by performing tai chi. When the Jubilee was over, Po invited Peng back to the Jade Palace, but Peng politely declined as he wanted to continue his travels, giving an example of his objectives out of his search for his uncle. When Po asked what Peng knew about his uncle, the young leopard answered that whoever his family left his uncle to be adopted by named him "Tai Lung", giving his new panda friend a shock.
Master and the Panda
Kung Fu Club
Peng is polite, even-tempered, noble, gentle, patient, extroverted, nice, great-hearted, protective, empathetic, no-nonsense, genuine, mature, responsible, trustworthy, clever, shrewd, kind-hearted, obedient and relaxed.