Oh, I've known about it for a little while. I was just never able to find the whole thing.
Here's my comment for the movie as a whole: A must see for any die-hard Mario fan. You don't need to understand Japanese to enjoy this, as the characters' actions give us, as Toad said, a general idea of what's going on.
That's all I want to say. I don't want to spoil the movie anymore than I already have.