A Banjunx was a giant, green-skinned humanoid native to the Isop Galaxy.

One Banjunx was cast as a monster in a hyperfilm directed by Zemm Foolini on Woldyhool. However, the casting people brought the actor's infant son onto the set instead, and it began eating the extras and the security force. The Tenth Doctor, who had come to Woldyhool in search of Cal MacNannovich, realised from the monster's lack of spikes that it was an infant, and used the studio lights to put on a shadow puppet show, calming it down. The Banjunx then spit up the people it had put in its mouth, as it hadn't eaten them and was merely tasting them. The real actor turned up and was reunited with his little boy. (COMIC: Hyperstar Rising)