Humdrum was a loanerbot that appeared in Season 1 of Robot Wars: Extreme Warriors and Nickelodeon Robot Wars. In Extreme Warriors, it was known as Joker and lent to the Sylvan Lake Robot Warriors team after their robot, also called Joker, was lost in transit to England before filming began. It won one battle in the Extreme Warriors War of Independence against regular UK competitor Spawn Again, but lost in the second round. Under its original name, Humdrum also competed in the Nickelodeon Robot Rebellion, operated by Team Robot Dojo, but lost after it and Squirmin Vermin were destroyed by the House Robots.