Shinkai Gattai Mosa Emperor

Shinkai Gattai Mosa Emperor (深海合海獣モサックスエンペラー, Deep Sea Union Mosa Emperor) is the movie robo for ''Shinkai Sentai Akuareiger. ''It is themed to a Mosasaur and is considered a 1/2 robo.

History
A Mosasaur died many moons ago and over time was covered by the land that would become Atlantis. When the city sank and later moved, the complete skeleton was dragged behind and later gained nutrients from living things and the pollution of Totalitarian Government Dark Horizon.

In the present, a team of Aqua Raiders discovered the partially exposed "mummified" Mosasaur, only to find that it was starting to wake up from a long slumber. The rangers fought tirelessly to defend their new mecha from control of Dark Horizon. It was about to consume Shin Mosa and Shin Plesio when they were grown. It was able to defeat Shin Mosa while Shin Plesio was defeated with Battalion Mars.

Some time later, a band of villains arrived from the 8th dimension along with two raven-themed monsters, Shin and Sombra. When the monsters united and grew into Twa Corbie, it was called upon and was able to drag Twa Corbie back to the ground to be stabbed by Battalion Mars.