Engine Gattai GunBir-O

"Engine Fusion! GunBir-O Tune up! Go-on!"

Engine Combination GunBir-O (炎神合体ガンバルオー), referred to as "Another King of Engines", is formed when Gunpherd, Birca and Carrigator combine. Its finishing attack is the GunBir Grand Prix, a 3-fold shot combo from all 3 Engines' finishers, and Carrigator says for the GunBir Grand Prix, "Herculean Strength Unrestricted. Other attacks include Bircutter Storm, Gunpherd Gunfire and Bircutter Slash.

Engine-O G6
See also: Zenith Megazord

"G6 Formation - Engine Fusion! Engine-O G6 Tune up! Go-on!"

Engine Combination GunBir-O (炎神合体ガンバルオー, Enjin Gattai Ganbaruō), referred to as "Another King of Engines", is formed when Gunpherd, Birca and Carrigator combine. Its techniques include Bircutter Storm (バルカッターストーム, Barukattā Sutōmu) and Bircutter Wrist Return (バルカッター小手返し, Barukattā Kote Gaeshi). Its finishing attack is the GunBir Grand Prix (ガンバルグランプリ, Ganbaru Guran Puri), for which Carrigator says "Herculean Strength Unrestricted" (剛力無制限, Gōriki Museigen), then performs a 3-fold attack of its Engines. GunBir-O can also use the Gunpherd Gun and Bircutter Slash attacks. With Engine-O and SeiKuu-O, it can perform Go-onger Storm, Triple Punch, and Grand Prix Festival.

Ren also makes Blaster Souls to use with the Handle Blasters.

Other Combinations

 * RPM-ValveMax Megazord Falcon.png Toripter, GunBir-O becomes GunBir-O Toripter (ガンバルオートリプター, Ganbaruō Toriputā), using the Gunpherd Gun and Toripter's turrets in its Toripgun Batariot (トリプガンバタリオット, Toripugan Batariotto).
 * With Jetras, GunBir-O becomes GunBir-O Jetras (ガンバルオージェットラGunBir-OJetras.jpgス, Ganbaruō Jettorasu), using Jetras's wings and the Bircutter in its Trabircutter Slash (トラバルカッタースラッシュ, Torabarukattā Surasshu) attack.
 * Engine-O G6 combines with Engine Gattai SeiKuu-O to form Engine-O G9, and further with Engine Gattai Kyouretsu-O to form Engine-O G12.