Giant Evil Zombie Nerds are the byproduct of people drinking Super-Evil Zombie Nerd Juice
Zorx, Klax, and Jennifer infiltrate Jerome Horwitz Elementary School as lunch ladies and serve the entire school Zombie Nerd Milkshakes with the Zombie Nerd Juice. They all obeyed the aliens' command and attacked George Beard, Harold Hutchins, and Captain Underpants. The three climbed up a latter to the school roof and escaped them. After, fighting the aliens and The Dandelion of Doom, they used Anti Zombie Nerd Juice to turn everyone back to normal.
- Jerome Horwitz Elementary School
Mr. Krupp is the only known school worker who did not become a zombie.
- Captain Underpants Saga
- Captain Underpants & The Invasion Of The Incredibly Naughty Cafeteria Ladies From Outer-Space (& The Equal Assult Of The Evil, Lunch-Room Zombie Nerds
- Captain Underpants & The Terrifying Re-Turn Of Tippy Tinkletrousers (Zombie Nerd Harold & Zombie Nerd George Only).
- Captain Underpants & The Revolting Revenge Of The Radioactive Robo-Boxers (Still, George & Harold).