Shadow Fiend was a competitor in the Series 2 Lightweight Championship of Robot Wars. Broadcast during The Grudge Matches, little is known about Shadow Fiend or its only battle. Shadow Fiend was only visible on the televised show in a wide shot for less than a second, as the various light weight categories were only briefly shown on screen during a summary.
Shadow Fiend faced Rosebud, Damacles, Slippery Strana, an unidentified robot, and Spartacus in the lightweight battle. All five competitors began very sluggishly, slowly approaching one another to try and push, but lacked the necessary aggression. The house robots very quickly entered the arena from the PPZs to attack the competitors, with Slippery Strana and Spartacus baring most of the attacks. Shadow Fiend was shoved around by Sergeant Bash in particular, but still showed signs of movement. Cease was soon called, with all five competitors just about still moving. The judges asked the roboteers to move around to show how the robots were after the battle. Shadow Fiend was still mobile, but Slippery Strana was able to move much more freely and flamboyantly, so the judges awarded Slippery Strana the win.