Mondo is a demonic magician from Mondo Magic. At first he seems to be a normal human magician, but is revealed to be a hideous monster wearing a human costume. He entraps Eustace in his television, and causes Muriel to slowly turn into the same monster so he can have a lover just like him. In order to save her Courage steals Mondo's bag of magic after distracting him with his own magic act then changes Muriel back to normal and transforms Mondo into a rabbit.
- He also made a cameo in Family Business as one of Courage's transformations.