The title of this series comes from the common misconception that the Toei series is a "season 0" to the NAS Yu-Gi-Oh! series, which was not dubbed.
It has been stated that the main reason that LittleKuriboh has not made any more episodes is the fact that the footage is rare to find 'raw.' As the series was never made in a language other than Japanese, it can be found on the Internet with subtitles to allow non-Japanese speakers to understand it. 'Raw' footage would be this footage, but without any subtitles.