Ms. Frizzle's pet lizard. She is seen in a lot of the episodes and has sometimes been the focus of one.
- She bears a heavy resemblance to a Jackson's Chameleon.
- She talks in three computer games.
- She is the most seen pet in The Magic School Bus.
- In In a Pickle, her full name is mentioned to be Liz Ard.
- In Spins a Web, the class refers to her as a female.
- She was the main focus of the episode Cold Feet.
- Liz is shown to know how to operate the bus' key in "Revving Up".