The MSZ-006-3B Zeta Gundam 3B Type (also "Gray Zeta") is a variant of the MSZ-006 Zeta Gundam piloted by former Zeon ace Shin Matsunaga (codename "Gray Wolf"), who calls it "Buster", and appears in the Gundam Evolve 9 CGI episode where it engages in battle with the QRX-006 Geminus, assisted by two other Zeta units.