Yuusha-Ou GaoGaiGar
English title: King of Braves GaoGaiGar
Japanese title: 勇者王ガオガイガー
Alternative titles: GaoGaiGar, GaoGaiGar TV, Yuusha Ou GaoGaiGar, Brave King GaoGaiGar, Yuusha-Oh GaoGaiGar
Type: TV
Source: Original
Episodes: 49
Status: Finished Airing
Aired: Feb 1, 1997 to Jan 31, 1998
Broadcast: Saturdays at 17:00 (JST)
Duration: 24 min per ep
Rating: PG-13 - Teens 13 or older
Studios: Sunrise
Producers: Victor Entertainment, Nagoya Broadcasting Network, Tokyu Agency
Licensors: Media Blasters, Discotek Media
Genres: Action, Adventure, Sci-Fi
Themes: Mecha, Super Power

In the year 2005, a race of alien monsters called Zonders emerge from underground and launch a series of attacks on the city of Tokyo. The only defense against these creatures is the secret agency known as the Gutsy Geoid Guard (or 3G) and their ultimate weapon, the awesome giant robot GaoGaiGar. GaoGaiGar's pilot, Guy Shishio, is a former astronaut who was nearly killed two years before when the Zonders first crashed to earth. Guy's life was spared when a mysterious robot lion called Galeon pulled him from the burning shuttle and brought him to Earth. Guy's father, Leo, then used Galeon's technology to rebuild his shattered son as a cyborg, in the hopes that he could stop the aliens when they appear. Now, with Galeon as its core, GaoGaiGar fights to protect Earth. He is aided by a team of transforming robots and by a young boy named Mamoru, who has the power to purify the Zonders' cores, and seems to be connected to the mysterious Galeon. 

(Source: ANN)