Gangster of the Sea, Pirate Glossom!

Synopsis

Underwater Mechanical Beast Grossom X2 began sinking ships one after another with its giant scissors. Among the passengers who suffered were Dr. Gordon, a scientist heading to Japan by invitation from the Photon Power Laboratory, and his wife and child. The rescued Dr. Gordon, to appease the spirits of those who died, begins modifying Mazinger Z with his daughter Risa to enable it to move freely underwater. Their idea is to attach Photonic Rocket thrusters to its legs.