The 1987 TMNT cartoon, of course, was a monumental success. Its popularity soared and created a fever pitch within new fans for more. Of course, the franchise spread overseas, but not without some complications. In the United Kingdom, media outlets deemed the word "ninja" to be too violent. The proposed change was to rename the show as Teenage Mutant Hero Turtles.
In addition to that, there were strict laws about the depiction of nunchucks. At the time, any media that featured nunchucks was immediately given a harsh rating. For instance, movies would immediately be rated 18 for adults. Around season five of the cartoon series, Michelangelo was given a grappling hook to replace his typical nunchucks. Confusingly, the katana, bo staff, and sais the other Turtles used were permitted to stay in the animated show.