As the battle rages on, the Power Rangers are forced to go on a quest to seek out the fabled master ninja, Ninjor. Ninjor teaches them the art of Ninja, giving them new powers and abilities, as well as joining the team himself. Assisted by their new Ninjazords, the superheroes are ready to do battle with Lord Zedd and Rita . . . but the forces of evil are also reinforced as Rita's brother Rito Revolto and her father Master Vile arrive on the Moon!