Scumbug is a mutated exterminator. He is constantly trying to exterminate the Turtles. He first appeared in Teenage Mutant Ninja Turtles Adventures issue 10, in which he fought the Turtles in the sewers and was later confronted by Wyrm (a mutant flatworm). As Scumbug and Wyrm fought knee-deep in sewer water, they accidentally got electrocuted by nearby power lines. However they would both return in a future issue, and were slated to return in the final story arc of the series, before its cancellation.