Avenger Penguins was an animated series produced by Cosgrove Hall Films in 1993, it was animated by Alfonso Productions, a Spanish based animation studio also responsible for bringing Cosgrove's previous show Fantomcat to life. It aired largely on Children's ITV. It has the distinction of being the last Cosgrove Hall cartoon to be animated using freely hand painted cells; it was originally to be called "Hell's Penguins".
The story revolves around three bike riding Penguins that inhabit Big City, uniting to protect it and its citizens from the evil Caractacus P. Doom, an insane and reclusive criminal scientist. The Penguins attempt to prevent Doom's schemes but find themselves often hampered by their own miscommunicating and occasional scraps with other biker gangs infesting Big City, such as The Stink Brothers, a rodent squad of Hell's Angels The series poked fun at the popular concepts of having creatures performing inhuman action feats and stunts in an animated medium, made popular by the then enormously successful Teenage Mutant Ninja Turtles franchise, at its core the show's themes heavily rung of Biker Mice From Mars. The cast, like DangerMouse and Count Duckula had with David Jason, boasted a star talent in a major role, this time in the form of Michael McShane as the Penguin's un-coordinated but brash leader Marlon. To show how the series was mocking the often rushed animation style of the original TMNT series, two supporting characters known as "The Badly Drawn Brothers" were always left with the design construction lines still showing out of deliberate neglect.