Synopsis for "The Mega-Monsters from Beyond! Part II: Triax"
With the arrival of Triax on Earth, Robert in the Red Ronin and Godzilla team up to battle the monster; however, when Triax is overpowered, the Megans send down their other two monsters, Rhiahn and Krollar, to aid their fellow Mega-Monster.

As the battle rages on, the Megans attack the Betan's base on the moon while, and the SHIELD Godzilla squad tries to coordinate the military counter attack against the monsters. During the course of the battle, the Betan's dome is breached, exposing them to the vacuum of space, and the Megans charge their monsters with an energy beam that makes them stronger than ever.

To make matters worse, Rhiahn is able to chop off the head of the Red Ronin robot, deactivating it and knocking Robert unconscious, leaving Godzilla to battle the super-powered monsters alone.