- "Man, the awesome spinner of Humdrum, at 220 pounds. He's got two maces on a spinning drum, that you better stay out of the way of!"
- — Stefan Frank introduces Humdrum
Humdrum was a loanerbot that appeared in Nickelodeon Robot Wars. Humdrum competed in the House Robot Rebellion, operated by Team Robot Dojo, but lost after it and Squirmin Vermin were severely damaged by the House Robots. The robot had previously competed in Extreme Warriors Season 1 under the name Joker with a different team.
Humdrum was a tall, silver robot with a cylindrically-shaped shell, which functioned as a full-body spinner. The shell featured two maces attached to the rim with chains, as well as several pictures depicting a juggling jester. The spinner was relatively capable, landing a heavy hit on Shunt and previously immobilised Spawn Again in one hit under its previous identity as Joker, although the weapon tended to break after carrying out a number of attacks. The armour was also relatively thin like other loanerbots, and Humdrum lacked a firm baseplate.
Humdrum got its full-body spinner up to speed, ricocheting off Shunt when the House Robot approached it. However, Humdrum had trouble getting its weapon spinning again, and Shunt punctured its top armor. Shunt then hit the pit release button, and pushed Humdrum around the arena. Dead Metal grabbed Humdrum with his pincers, easily slicing through Humdrum's body several times with its saw. Sir K then entered the arena, dumping Squirmin Vermin out of the arena before picking up the immobilized Humdrum and crumpling its shell. Humdrum was finally put on the Drop Zone, where it had a pile of scrap metal dropped onto it.
|HUMDRUM - RESULTS|
|House Robot Rebellion|
Competing with Squirmin Vermin, Lost
|House Robot Rebellion||vs. Shunt & Dead Metal (later joined by Sir K)||Lost|
- Wins: 0
- Losses: 1
|US Series||Humdrum Series Record|
|Season 1||Did not enter|
|Season 2||Entered with Diskotek and Propeller-Head|
|Nickelodeon||House Robot Rebellion|
Entered with Diskotek and Propeller-Head
NOTE: The loanerbot Humdrum competed in the first season of Extreme Warriors as Joker
- Humdrum and Squirmin Vermin are the only robots which debuted outside of the first two UK series to compete on the show without battling another competitor robot, although both of their previous identities did.
- A clip of Humdrum being attacked by the House Robots was used in the show's opening in Series 6, 7, Extreme 2, Dutch Robot Wars: Series 2 and Nickelodeon Robot Wars.