G-On Riders

G-On Riders (G-onらいだーす) is a Japanese magical girl parody anime series produced by TNK and Shaft, and aired from July to October 2002.

Plot
In the near future, most of the Earth has been conquered by aliens. However, a small region in Japan has successfully repelled them thanks to the development of "G-On" technology by the Grand Reflect Armored (GRA). This technology involves a band of girls who channel energy through special glasses. In this way, they are able to destroy the giant mechanized "Fancy Beasts", sent by the aliens.