A three-issue miniseries that featured the "TMNT Supermutants" Turtle toys that were on sale at the time. The first volume of the anime miniseries followed this storyline.

When the Teenage Mutant Ninja Turtles acquire Mutastones from Crys-Mu, the spirit of light, they acquire the ability to enhance themselves into Super Turtles for a duration of three minutes. Meanwhile, the evil Shredder and his minions Bebop and Rocksteady stumble upon the Dark Mutastone, which transforms them into Devil Shredder, Supermutant Bebop and Supermutant Rocksteady, respectively. But the Turtles have one more trick up their shells: all four of them can combine into their ultimate form - Turtle Saint.
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(Source: Anime News Network)

There have been a number of TMNT manga published in Japan which have never been released in the West.<br><br>
Mutant Turtles Gaiden is a collection of short stories drawn and written by Hiroshi Kanno and published by Dengeki Comics.

Ordinary schoolkid Urashimada Taro serves as the unwilling caretaker of the wacky and off-the-wall turtles, who are mistaken for foreign exchange students.

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