Bazin B9 is a humanoid Mechanical Beast with a dome piece covering the head. It also possesses a pair of antenna on its shoulders. There appears to be a face or brain of some sort behind the dome helmet, but it is difficult to view from a distance.
Bazin B9 was with Bamaras Y1 as Baron Ashura came into their hangar. Baron Ashura planned to use them both for his plans to fight the Mazinger Z. When Baron Ashura's plan to assassinate Koji Kabuto failed and Koji docked the real Mazinger to fight Ashura's copy, Bazin and Bamaras came to assist him/her. While the Mazinger managed to counter Bamaras' tentacles, Bazin B9 created an electrical field that even managed to negate gravity. As soon as the field wore off, the Mazinger plummeted which gave Koji a massive shock from the fall. As the Mechanical Beasts attacked again, Mazinger destroyed the Bamaras' antenna and made a comeback destroying both Mechanical Beasts.