Gravion Zwei is a tV series anime that premiered in winter 2004, produced by GONZO.

About the production: the story comes from an original script, there are 12 episodes of about 20 minutes and its current status is "finished".

Its main genres are adventure, comedy, mecha and sci-fi, with themes such as Super Robot, Male Protagonist, Primarily Female Cast and Aliens.

On AniList, Gravion Zwei has an average score of 64%, an average score, and appears on 2,661 users' lists.

The franchise continues in or follows from: Choujuushin Gravion.

After Gravion was able to use its ultimate attack, the Zeravire threat seemed to have temporary stopped. However when it rises back up all of a sudden, the Earth Gult and its trump card, the super robot Gravion, is needed to defend this world again. All this while, the EFA is planning to create their own weapons to counter the Zeravire, the Grand Trooper. Now as they attempt to fend off the Zeravire, the people of the Earth Gult and EFA must protect their future as well as confront their pasts, and unveil the mysteries of the Zeravire. (Source: Anime News Network)

Official synopsis from AniList.