Pengpeng

Pengpeng was Kelsang's flying bison.

History
When Yun was believed to be the Avatar, Kelsang took Yun around the world on the back of Pengpeng.

Yun travelled to the Fifth Nation's headquarters on Pengpeng's back, bringing Kyoshi and Rangi along with him.

When Jianzhu orchestrated a contest to find out whether Kyoshi or Yun was the true Avatar, he stole Pengpeng, forcing Kelsang to travel by his airbender staff.