Complex sentence: My Goddess The Movie premired in 2000 is the 100 minute movie with a main plot a canon of its own however many of the plot elements and side-events are based heavily on elements from a wide variety of chapters from Kousuke Fujishima's original manga.
Split into simpler sentences: My Goddess The Movie premiered in 2000 is the 100 minute movie with a main plot a canon of its own. However many of the plot elements and side-events are based heavily on elements from a wide variety of chapters from Kousuke Fujishima's original manga.