Choujyu Sentai Liveman
It was the first Super Sentai series to have a female Blue Ranger as well as the first Super Sentai series that introduced animal-based mecha. It was also the first Super Sentai series that introduced a super-combined robot (that is 2 or more robots put together); the first Super Sentai series to have three members from the start, with two additional members joining later on; it was the last Super Sentai series that had its mechas transported to the battle through a flying fortress on a regular basis, which could not occur again until Bakuryū Sentai Abaranger; and it was the first Super Sentai series to have both a Green Ranger and a Black Ranger in the main five, as opposed to interchanging one with another. This did not occur again until Engine Sentai Go-onger.