i have seen it too! and the movie is awesome.
It's not a cartoon though it's anime. The difference is that japan has a long history in anime and has advanced them way more than the typical cartoons that most country have.
The stories are better, as well as the animation most of the times and a lot of them are for a more mature audience that's why you can see smarter plots, fighting, killings, blood etc etc
Imagine that there so many anime and each season they introduce to the public at least 20-30 new ones :P
Yes animes! I stand corrected, thanks a lot, its good to see you back, how was your little holiday?
There are actually a bunch i havent even seen so much lol
if you start watching you gonna get addicted :P