The Inventor appeared in the episode "Totally Busted". He was a mad scientist who created the SUDS to turn regular people into spy-ssassins, who would then assassinate spies across the world. He also invented several other weapons, which were also created to execute spies.
- Acid Venom Spy-der (robot)
- Laser Vision Spy-bulb (laser sunglasses)
- Spy Fly (robot)
- Spy-ra (virus)
- Spy-raser (rocket launcher)
- Spy-strictor (force field generator)
- Spy-vy (fast growing ivy)
- SUDS (Simple minded Users Destroy Spies)
- The Inventor's WOOHP prisoner number is M101.
- Is a perfect example of the Mad Scientist trope right down to having "crazy hair".