Xeno Fly was a little golden statue of a fat fly with red eyes and a big open mouth.
It could turn the user into fly. The user had also the ability to change other people into flies with the Shen Gong Wu.
It was used by Omi and Ping Pong when Omi trained Ping Pong in the forest. Omi wagered the Wu in a showdown against Shadow and won. It was used also when the Xiaolin Monks wanted to save Ping Pong and entered inside his head.