Geraldine Shannon Warthog is Principal Pixiefrog's assistant; she does all of the filing and is, obviously, a warthog. Ironically, she never works and rarely speaks. In The Big Field Trip, Mrs. Warthog was the bus driver. Completely fed up with her job and her employer, she always has an air of complete exasperation about her. Her voice is identical to that of Nurse Gazelle. In That Darn Platypus, it is revealed that she spends most of her time playing computer solitaire and gets very agitated when she is unable to play. It is shown in Little Mermonkey that she enjoys fishing, since it's "hardly work". Portrayed by Grey DeLisle.
- She is a speaking warthog, like Pumbaa from The Lion King.