- Birca- Go-On Green's Engine partner #4, an orca / bike, who forms GunBir Oh's left arm.
- Gunpherd- Go-On Black's Engine partner #5, a german shepherd / police car, who forms GunBir Oh's right arm.
- Carrigator- Engine #6, an alligator / car carrier, who forms GunBir Oh's head, body, and legs.
- Engine Oh G6- Combination of Engines 1-6, or Engine Oh and GunBir Oh.
- GunBirOh Toriptor- Go-On Gold's Engine partner #7, a chicken / helicopter, can attach to GunBir Oh's right arm.
- GunBirOh Jetras- Go-On Silver's Engine partner #8, a tiger / jet, can attach to GunBir Oh's right arm.
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