|“||Prepare to feel the wrath of...the Toiletnator!||”|
The Toiletnator (real name Louis "Lou" Pottingsworth III) is a recurring villain of the Kids Next Door, and the self-proclaimed arch-nemesis of Numbuh 4. He is an adult who wears a yellow plumber's outfit including rubberized boots, toilet paper rolls as a cowl and gauntlets, a toilet seat to secure his cape, and completes the ensemble with an arsenal of toilet-themed weapons. He is largely considered the lamest adult villain between kids and adults alike, and is terrified of Planet Fusion.
In FusionFall, the Toiletnator can be found at Camp Kidney handing out missions for other villains. He mainly serves as the link between the adults and the Kids Next Door. His signature weapon is the Plunger of Doom. Toiletnator wants to prove himself by helping in the fight against Fuse, especially after letting Fusion Bloo inside of Foster's Home. His efforts usually end up failing or causing more trouble for the heroes.
- The Toiletnator's real name references the British slang for the toilet, "Loo".