In his early appearances, Shredder was presented as extremely cunning and was described by Splinter himself as the most dangerous adversary he ever faced. Shredder's intelligence persevered throughout his various portrayals, and in several instances, it is claimed that Shredder has an IQ of 300. As the 1987 cartoon series was more light-hearted than the comics, Shredder was later depicted as evil but a villain that always fails rather than the dire and lethal ninja he was originally shown to be. He and Krang are constantly bickering about tactics and often take pleasure in the other's failings (and sometimes intentionally sabotage each other). His two henchmen Bebop and Rocksteady are especially incompetent and fail miserably at everything they do. They were mostly used for comic relief in the show; however, the Turtles certainly consider them to be formidable (despite their inane stupidity) in combat due to their great strength and endurance, and as such, often use their intelligence to outwit them.