Chouseishin Gransazer (2003)

The Chou Sei Shin Series (Ultra Star God Series) is a trilogy of tokusatsu shows aired from 2003-2006. Created by Toho (who famously produced the Godzilla movies) and Konami, it was their attempt to break into the Henshin Hero market that was - at the time - dominated by Toei and their two major franchises, Super Sentai and Kamen Rider, with Tsuburaya's Ultra Series for good measure. The shows revolve around the title Ultra Star Gods: Humongous Mecha that are used by the protagonists to protect the Earth from an extraterrestrial threat. This is the first entry was Chou Sei Shin Gransazer, that aired in 2003. The Earth was once a highly advanced civilization until it was attacked by the Alien Alliance. The Earth built giant mecha known as Ultra Star Gods to defend themselves, but even with their power the Earth was eventually defeated. Millions of years later, the Lost Technology of that ancient civilization is stirring, awakening the ancient DNA lying dormant in twelve chosen warriors that calls them to fight a new alien threat once more. The twelve heroes- the Gransazer- were each named after a star sign and arranged into four elemental Tribes: Fire, Wind, Earth and Water. The main protagonists are the Fire Tribe, and the three other Tribes originally enter as antagonists to them, either directly or indirectly. When all three members of a Tribe gather, they can awaken and summon their respective Ultra Star Gods.