Fads aren't the point, there's tons of later TMNT series up to today that prove it's still relevant (even though it'll never be as big as it was in the 80s-early 90s). In comparison as a lot have pointed out, only Woody has managed to stay relevant out of the 3 in the ad (in places like Brazil.

Also may as well post the YT link to Uncle Duck YTP i made a while, since i forgot to even tho it's garnered quite a bit of attention on it's own already.
www.youtube.com/watch?v=-r39...

Definitely the last one on them.