The Mask of Doom: Part 2 - S1-E9
Revealing mistake: When the young violinist is handing Victor Von Doom a sack full of money, the sack passes through Doom's fingers. (00:09:52)
The Mask of Doom: Part 2 - S1-E9
Revealing mistake: When the ski patrol is firing at young Victor Von Doom and his father, the tree they hit appears out of thin air. (00:07:20)
Answer: Gleaned from the Internet: Much of the negative reaction was due to the poor, simplistic, and outdated quality of the animation where the characters moved stiffly and clumsily through scenes. There were also some obvious animation compositing gaffs. The animation colors were also criticized as being overly bright and cheery and out of character to the established story's darker tone. The broad humor of the first season was replaced by a more mature narrative between the characters.
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