Other mistake: When the elder Tongzing and Tenzing walk through the bushes, they simply pass through them, the bushes don't react to them moving through. (00:18:50)
Other mistake: When we see Betty being surrounded by the ninjas reflected in the pupil of Bruce's eye, the reflection is not reversed. (00:02:08)
Answer: I believe it was mentioned in an issue of Wizard Magazine that the show was cancelled because of low ratings, and reportedly the show's creative shift in the second season had a part to play in the low ratings, as the changes alienated fans.
Phaneron ★