Of course, in Japan, they made "Mutant Turtles" (no "teenage" or "ninja," so far as I know) even sillier. (I've mentioned it before; if you hit the "tmnt" tag, you should find it pretty quickly.)
(Hilariously, in the second episode of this OVA, when
And of course, in the UK they dropped all references to ninjas as well, calling them "hero" turtles. They also took away Michaelangelo's nunchucks in later seasons and replaced them with a rope, supposedly because 'chucks were too violent for the kiddies (like a kid is more likely to copy violence involving a relatively rare weapon than violence involving a rope?).