It's the Tournament of Elements! The evil Master Wu has returned to team up with Master Chen in an effort to defeat Sensei Garmadon and his team of ninja. It's girls against boys in this epic face-off as secrets are revealed, loyalties are tested, and new bonds are formed. But remember: Only one can remain. Dark Sides is a Role Reversal AU series in which Wu was bitten by the Great Devourer instead of Garmadon. Wu still ends up training Kai, Jay, Zane, and Cole as his students. In response, Sensei Garmadon trains Nya, Pixal, Seliel, and Skylor (all elemental masters), and both sides are pitted against each other.

Master Chen is on the loose, and the two teams of ninja have formed a tentative alliance in order to hunt him down. With the help of the other Elemental Masters, they just might stand a chance. However, as the stakes grow higher and lines between the ninja are blurred, the question remains of who will be left standing at the end of it all? Dark Sides is a Role Reversal AU series in which Wu was bitten by the Great Devourer instead of Garmadon. Wu still ends up training Kai, Jay, Zane, and Cole as his students. In response, Sensei Garmadon trains Nya, Pixal, Seliel, and Skylor (all elemental masters), and both sides are pitted against each other.