A giant sea monster known as "Dragonsaurus" has emerged from out of nowhere, terrorizing the depths of the oceans. Great Mazinger, Grendizer and the Getter Robo G team join forces to combat the new threat. But their task becomes more complicated when Dragonsaurus swallows up Boss Borot and makes its way towards Tokyo.
| Name | Type | Role | |
|---|---|---|---|
| Susumu Takaku | Writer | ||
| Masayuki Akehi | Director |