I remember seeing trailers for The Forbidden Kingdom and as I recall they were all about "together for the first time — Jet Li and Jackie Chan!". I don't remember a single thing being mentioned about "a wimpy time-traveling white teenager!"
The parts of this movie that are a Chinese action movie are a pretty good mystical Chinese action movie. The parts that an American teenager having a coming-of-age are pretty standard for that genre, which is to say, pretty lame.
FuzzyCo grade: C+