Warning: Spoilers for Teenage Mutant Ninja Turtles x Naruto #1 Master Splinter is already a martial arts powerhouse in Teenage Mutant Ninja Turtles' main continuity, but the version of him in the ...

and are mentored in the art of ninja combat by the wise rat Splinter. When the evil Shredder attempts to take over the world, the turtles set out to stop him.