The year is now 2041 AD. A new enemy called Zeravire suddenly appears in the solar system, destroying all military installations it comes across. However, a wealthy man named Klein Sandman is already aware of this planned invasion and had been secretly preparing his army for battle. His trump card is Gravion, a giant robot that utilizes gravity as its source of energy. Meanwhile a young man named Eiji secretly enters Sandman's base in search for his missing sister. It is there that he meets another young man by the name of Toga... These two must now fight together with four other individuals aboard the super robot, Gravion to fend off the Zeravire threat.

Alternative title:

• Choujuushin Gravion (Japanese)
• Super Heavy God Gravion

Gravion 1 :

• 1. The Castle of the Slumbering Giant God
• 2. Gravitational Vocation
• 3. The Labyrinth
• 4. The Princess in the Tower
• 5. A Girl Who Doesn't Smile
• 6. Touga's Holiday
• 7. Drill Girl on the Beach
• 8. Super Heavy Battlefield
• 9. Distant Embrace
• 10. Crack
• 11. Parting with Myself
• 12. Because You Are
• 13. Silver Fangs

• 1. Super Heavy God, Second Coming
• 2.Elegant Reunion
• 3. Passionate Fight! Gravi Onsen!!
• 4. From the Bottom of the Wave
• 5. The Dream Solitary Isle
• 6. Lamenting Rosario
• 7. The Shattered Goddess
• 8. When Gravity Becomes Weak
• 9. The Crimson Fang
• 10. The Sun's Flames
• 11. Creation Star Machine
• 12. The Spirital Song of Victory