The Gerbil Jogger 2000 as it appeared in Captain Underpants and the Perilous Plot of Professor Poopypants.
The Gerbil Jogger 2000 was one of Professor Poopypants' (later renamed Tippy Tinkletrousers) early inventions.
Appearance
The Gerbil Jogger 2000 has two red Ps together on a lightning bolt. It has a glass screen so the gerbil inside it can be seen. When Professor Poopypants used the Goosy-Grow 4000 to enlarge the jogger, it grew to the size of a large building.
