The series follows six teens chosen by the wise sage Zordon to become "Power Rangers" and stop the evil Rita Repulsa and Lord Zedd from taking over the planet Earth. Season three picks up directly where season two left off, with the Rangers facing off against the evil team of Rita Repulsa and Lord Zedd. The season premiere features a crossover between the Power Rangers and Masked Rider. This season introduces Rito Revolto, Rita's brother, who aids Zedd and Rita in destroying the Rangers' ThunderZords, causing the Rangers to search and obtain Ninja Powers from, Ninjor, the original creator of the Power Coins. Katherine Hillard, originally under a spell cast by Rita, becomes a new friend of the Rangers and the new Pink Ranger, as Kimberly decides to move to Florida with a professional gymnastics coach to train for the Pan Global Games.