A Japanese exclusive two-episode anime OVA series was made in 1996, titled Teenage Mutant Ninja Turtles: Legend of the Supermutants (ミュータント・タートルズ超人伝説偏, Myūtanto Tātoruzu: Chōjin Densetsu Hen^?). The OVA was similar in tone to the humorous 1987 TV series and uses the same voices from the Japanese dub of the 1987 TV series.

The first episode was made to advertise the TMNT Supermutants toys. It featured the Turtles as superheroes, who gained costumes and super powers with the use of Mutastones, while Shredder, Bebop and Rocksteady gained super-villain powers with the use of a Dark Mutastone. As with the Super Sentai and Power Rangers franchises, the four Turtles can combine to form the giant Turtle Saint.

The second episode was created to advertise the Metal Mutants toys in which the characters gain Saint Seiya-esque mystical metal armor that can transform into beasts. The seven Japanese Mutanite stones encased in a magic mirror that control the Metal Beasts are based on the sun, moon, and the Five Elements