Panda originally belonged to Tom when he was writing about his travels with Iris Wildthyme. After Iris returned to Earth, Panda and Tom joined her in her travels around the multiverse. (AUDIO: Wildthyme at Large)
Several times, Panda got lost at the end of the universe (PROSE: Iris Wildthyme and the Celestial Omnibus), completely changed in size (PROSE: The Shape of Things) and was killed (PROSE: The Panda Book of Horror).
Panda sacrificed himself to save the multiverse from being invaded by his alternative selves by jumping into a rift in the Time Vortex while holding a bottle of whisky. (AUDIO: The Panda Invasion) Panda did not die as he had expected. He was saved by Iris Wildthyme and Santa. (AUDIO: The Claws of Santa)
One of Iris' future incarnations starred in a successful television series as well as several films. Panda only appeared in the pilot episode of the series before he was replaced by a kangaroo named Hoppy. (AUDIO: The Iris Wildthyme Appreciation Society)
Panda was usually bad-tempered. He took offence at being called a toy. Like Iris, Panda drank heavily, and always carried a hip flask of whisky with him, as he felt that it kept him safe through dark times. (AUDIO: The Two Irises) Panda resented being described as a bear and threatened to punch those whom he had felt insulted him "right up the hooter." (AUDIO: Wildthyme at Large, et. al)