While the Power Rangers franchise's most popular and utilized season theme is dinosaurs, they've had other themes in the past that have been popular and brought to screen multiple times—enough to make them popular staples of the series like the dinosaur theme is. The second-most-popular, next to the obvious, is most certainly the theme of Ninja Power Rangers. The idea of Ninja Power Rangers first spawned from Season 3 of Mighty Morphin Power Rangers, where the original team utilized ninja power after the destruction of the Thunderzords.
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