King Koopa's Kool Kartoons is a local, American live-action children's television show broadcast in Southern California during the Autumn of 1989.

The show stars King Koopa, based on an animated version of Bowser, the central arch-villain from the Mario video game series.

The actor playing Koopa (originally Christopher Collins, later Patrick Pinney) performed the role with a gruff, gravel-voiced faux-malevolence that ultimately revealed a hesitantly nice personality.

Unlike any previous appearance, King Koopa was seen with a pet creature named Ratso that best resembled a mix of dog and weasel with the large ears of a bat.

In a "Viewers' View" column in the Los Angeles Times, a parent wrote that the show's portrayal of King Koopa was "frightening for small children", implying a mixed reception.