List of Engine Sentai Go-onger characters

Engine Sentai Go-onger (炎神戦隊ゴーオンジャー) is a Japanese tokusatsu series that serves as the 32nd installment in the Super Sentai franchise and the 20th entry in the Heisei era. The series follows the titular team in their battles against the Gaiark Clan, who have conquered several Braneworlds and now seek to do the same to the Human World.

Go-ongers
The eponymous Go-ongers are a team of five humans partnered with inhabitants of the Braneworld of Machine World called Engines based in an RV called the Ginjiro-go (ギンジロー号) who utilize Change Soul (チェンジソウル) microchips in order to transform. While transformed, they each carry a Mantan Gun and wield unique Go-on Gear (ゴーオンギア) weapons. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, after losing their Engine Souls, the Go-ongers learn the Engine Fist (炎神拳) fighting style to compensate for the brief loss of their partners and gain the ability to perform the Super-Super Special Highway Buster (超超スペシャルハイウェイバスター) finisher.

The primary members composed of Sōsuke, Renn, and Saki utilize blue-colored Change Souls in conjunction with the Go-Phone (ゴーフォン) in order to transform. With the Bridge Axe, Cowl Laser, and two Rocket Daggers, they can perform the Go-on Bond Spirits (ゴーオンキズナスピリッツ) finisher.

Inversely, the secondary members composed of Hanto and Gunpei utilize green-colored Change Souls in conjunction with the Shift Changer (シフトチェンジャー) brace in order to transform.

Sōsuke Esumi
Sōsuke Esumi (江角 走輔), nicknamed the "Speed King", was a former race car driver who possesses a sunny disposition and was known amongst his racing team as "Miracle Esumi" for his belief in miracles. Unyielding to the point of obstinacy and confident to a fault, he confronts all obstacles without hesitation and is highly protective of his teammates. After defeating the Gaiark Clan, he returns to racing, albeit as a go-kart driver.

Sōsuke can transform into Go-on Red (ゴーオンレッド). While transformed, he can perform the Go-on Thrust (ゴーオンスラスト) and Spin Rod Crash (スピンロッドクラッシュ) attacks via the Mantan Gun in Rod Mode. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, he learns the Engine Fist moves Geki Speedor Saber Straight (ゲキスピードルサーベルストレート) and Drrr-Drrr Bullet (ドルドル弾). With Geki Red and Rio, he can perform the Geki-Rin Engine Bullet (激臨炎神弾) attack.

During the events of the crossover film Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, Sōsuke utilizes Shinken Red's Dinosaur Disk in conjunction with the Mantan Gun to transform into Hyper Go-on Red (ハイパーゴーオンレッド), granting the aforementioned sidearm in Rod Mode similar capabilities as the Kyoryumaru.

Sōsuke Esumi is portrayed by Yasuhisa Furuhara (古原 靖久). As a child, he is portrayed by Hiroto Terui (照井 宙斗).

Renn Kōsaka
Renn Kōsaka (香坂 連), nicknamed the "Cyclopedia" for his attention to the smallest detail and "mother" (オカン) for his doting personality and cooking expertise, is the Go-ongers' talkative second-in-command and chief technician who formerly worked as a bus driver. Over the course of the series, he builds or fine-tunes many of the Go-ongers' weaponry and helps the Engines combine into stronger forms. Following the Gaiark's defeat, Renn becomes Sōsuke's mechanic in the go-kart racing circuit.

Renn can transform into Go-on Blue (ゴーオンブルー). While transformed, he can perform the Go-on Drift (ゴーオンドリフト) and Sniper Shoot (スナイパーシュート) attacks via the Mantan Gun in Rod and Gun Mode respectively. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, he learns the Engine Fist move On-on Bullet (オンオン弾).

Renn Kōsaka is portrayed by Shinwa Kataoka (片岡 信和). As a child, he is portrayed by Shunpei Ijuin (伊集院 竣平).

Saki Rōyama
Saki Rōyama (楼山 早輝), nicknamed the "Sweet Angel", was a concessions vendor who worked the stands of the Twin Ring Motegi racetrack and is known for cheerful, eager personality, which stemmed from an encounter with a woodland spirit who taught her to always "smile, smile". Amidst the Go-ongers' fight with the Gaiark, Saki briefly breaks off from her teammates to form the G3 Princess (G３プリンセス) and Go-on Princess (ゴーオンプリンセス) idol groups in order to defeat a separate foe on two separate occasions. Following the Gaiark's defeat, Saki goes on to fulfill her dream of opening a cake shop.

Saki can transform into Go-on Yellow (ゴーオンイエロー). While transformed, she can perform the Go-on Spin (ゴーオンスピン) and Machinegun Shoot (マシンガンシュート) attacks via the Mantan Gun in Rod and Gun Mode respectively. With Go-on Silver, she can perform the Flower Cannonball (フラワーキャノンボール) finisher. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, she learns the Engine Fist move V-V Bullet (ブイブイ弾).

With her fellow G3 Princess members, Saki can perform the G3 Triangle (G３トライアングル) attack and the Princess Cannonball (プリンセスキャノンボール) finisher. With her fellow Go-on Princess members, she can perform the Princess Triple Attack (プリンセストリプルアタック) and the Princess Triple Punch (プリンセストリプルパンチ) attack.

Saki Rōyama is portrayed by Rina Aizawa (逢沢 りな) as an adult and by Asumi Kikuchi (菊池 和澄) as a child.

Hanto Jō
Hanto Jō (城 範人), nicknamed the "Vagabond", is an enthusiastic, kind-hearted, but immature freeter working part-time at the Doki Doki Pizzeria who became a Go-onger after helping Gunpei Ishihara return the original Go-ongers' Engine Casts.

Hanto can transform into Go-on Green (ゴーオングリーン). While transformed, he can perform the Cycle Punch (サイクルパンチ) attack. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, he learns the Engine Fist move Bir-Bir Bullet (バルバル弾).

Hanto Jō is portrayed by Masahiro Usui (碓井 将大).

Gunpei Ishihara
Gunpei Ishihara (石原 軍平), nicknamed the "Chaser", is an insecure and buffoonish former police officer with excellent marksmanship and a passion for justice who tries to put on a cool and serious front. After witnessing the original Go-ongers during their initial battles with Gaiark, Gunpei quits the police force after they refuse to help. Upon discovering the Go-ongers' identities, he goes to extreme lengths to join them, going so far as to kidnap their ally, Bomper, and steal their Engine Casts. Upon learning of how they were chosen, Gunpei returns the casts and becomes a Go-onger. Following the Gaiark's defeat, Gunpei returns to the police force and becomes a detective.

Gunpei can transform into Go-on Black (ゴーオンブラック). During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, he learns the Engine Fist move Ganga Ganga Bullet (ガンガガンガ弾).

Gunpei Ishihara is portrayed by Kenji Ebisawa (海老澤 健次).

Go-on Wings
The Go-on Wings (ゴーオンウイングス) are an elite two-man fighting force composed of the Sutō siblings, who came from a Plutocratic lifestyle. They were chosen by the Wing Clan Engines because of their esper abilities and brought to Machine World to become the Go-on Wings under Engine Jum-bowhale's guidance before the Go-ongers came to be. Due to their training however, they initially view the Go-ongers as too inexperienced to protect Earth until Jum-bowhale teaches the pair about what truly makes the Go-ongers, leading to the Go-on Wings becoming their allies. After defeating the Gaiark Clan, they resume their familial duties as members of high class society, though Hiroto was reluctant to do so. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, it is revealed that the Go-on Wings learned the Geki Jūken Beast Arts fighting style from Gorie Yen.

Unlike the primary or secondary Go-ongers, the Sutō siblings utilize red-colored Change Souls in conjunction with the Wing Trigger in order to transform. While transformed, they each wield a Rocket Dagger, which allows them to fly via the Jet Dagger (ジェットダガー) function and perform a variety of elemental-powered attacks. Additionally, they can combine their Wing Triggers and Rocket Daggers to form the Wing Booster, which allows them to perform the Hyper Cannonball (ハイパーキャノンボール) finisher alongside the Go-ongers.

Hiroto Sutō
Hiroto Sutō (須塔 大翔), nicknamed the "Philosopher", is the cool and aloof leader of the Go-on Wings who is proficient in combat. He trains extensively in boxing and kickboxing, and possesses an esper ability that allows him to sense nearby danger. Despite his cold exterior, he possesses a fiery passion and a willingness to put his life on the line to protect those he cares about. Due to this, he became known as the Go-ongers' father figure.

Hiroto can transform into Go-on Gold (ゴーオンゴールド).

Hiroto Sutō is portrayed by Hidenori Tokuyama (徳山 秀典) as an adult and by Shogo Ehara (江原 省吾) as a child.

Miu Sutō
Miu Sutō (須塔 美羽), nicknamed the "Lovely Sensation", is Hiroto's younger sister with a "princessy" attitude, skill in aikido, and an esper ability that allows her to see things through the flowers she tends to. She displays an over-dependence on her brother, who she refers to as "ani", along with a desire to improve those she perceives as lesser than her. Over the course of the series, she develops a close friendship with Saki Rōyama and a hesitant crush on Sōsuke Esumi. Additionally, she temporarily breaks off from Hiroto to form the G3 Princess and Go-on Princess idol groups to defeat a separate foe on two separate occasions.

Miu can transform into Go-on Silver (ゴーオンシルバー). With Go-on Yellow, she can perform the Flower Cannonball.

Miu Sutō is portrayed by Yumi Sugimoto (杉本 有美) as an adult and by Airi Yoshida (吉田 愛里) as a child.

Arsenal
The Go-ongers' technology revolves around the Engine Souls (炎神ソウル), which hold the Engines' souls, along with other types of Souls.


 * Mantan Gun (マンタンガン): The Go-ongers' gas pump dispenser-like sidearm that has a Gun Mode (ガンモード) for performing the Go-on Cannonball (ゴーオンキャノンボール) finisher and a Rod Mode (ロッドモード) for performing the Go-on Screw (ゴーオンスクリュー) finisher.
 * Highway Buster (ハイウェイバスター): The combined form of Go-on Red, Blue, and Yellow's Go-on Gears.
 * Road Saber (ロードサーベル): The personal weapon of Go-on Red, with which he can perform the Saber Straight (サーベルストレート) attack. With the Road Saber and a Rocket Dagger, he can perform the Saber Straight: Go-on Rendezvous (サーベルストレート・ゴーオンランデブー) and the Saber Spin Crash (サーベルスピンクラッシュ) attacks.
 * Garage Launcher (ガレージランチャー): The personal weapon of Go-on Blue, with which he can perform the Launcher Starter (ランチャースターター) attack and its Jumping Attack (ジャンピングアタック) variation.
 * Racing Bullet (レーシングバレット): The personal weapon of Go-on Yellow, with which she can perform the Bullet Crash (バレットクラッシュ) attack.
 * Junction Rifle (ジャンクションライフル): The combined form of Go-on Green and Black's Go-on Gears.
 * Bridge Axe (ブリッジアックス): The personal weapon of Go-on Green, with which he can perform the Axe Tooling (アックスツーリング) attack.
 * Cowl Laser (カウルレーザー): The personal weapon of Go-on Black, with which he can perform the Laser Highbeam (レーザーハイビーム) attack.
 * Super Highway Buster (スーパーハイウェイバスター): The combined form of all five Go-ongers' Go-on Gears.
 * Handle Blaster (ハンドルブラスター): A steering wheel-like weapon that has a Handle Mode (ハンドルモード) for the Go-ongers to operate EngineOh G6, G9, and G12 and a Blaster Mode (ブラスターモード) for performing finishers via the Blaster Soul (ブラスターソウル).
 * Wing Booster (ウイングブースター): The combined form of the Go-on Wings' Wing Triggers and Rocket Daggers.
 * Wing Trigger (ウイングトリガー): The Go-on Wings' transformation device which also serve as joysticks for piloting their Engines and SeikuOh.
 * Rocket Dagger (ロケットダガー): The Go-on Wings' sidearm that is capable of performing the Burning Dagger (バーニングダガー), Freezing Dagger (フリージングダガー), Lightning Dagger (ライトニングダガー) Shining Dagger (シャイニングダガー), Shooting Dagger (シューティングダガー), Jumping Dagger (ジャンピングダガー), and Dagger Acrobat (ダガーアクロバット) attacks.
 * Armored Wheel Go-Roader GT (装甲車輪ゴローダーGＴ): A wheel-like robot that Hiroto and Jum-bowhale invented. Starting out in a palm-sized Wheel Mode (ホイールモード), it can enlarge and transform into the humanoid Action Mode (アクションモード) via the Tokon Soul (トーコンソウル), which Renn developed. In Action Mode, it can perform the Go-Roader Kick (ゴローダーキック) and the Go-Roader Strike (ゴローダーストライク) attacks. In a human-sized Wheel Mode, it can perform the Go-Roader Attack (ゴローダーアタック) finisher. Additionally, the Engines' Souls are compatible with the Go-Roader GT, allowing them to effectively assume a humanoid form.
 * Kankanbar (カンカンバー): A crossing gate-like weapon developed by Renn Kōsaka to utilize the ancient Engines' power that can switch between Rod Mode and Gun Mode as well as hold two Engine Souls at once. With T-Line and K-Line's Souls, it can perform the Crossing Stopper (クロッシングストッパー) finisher on its own and the Double Cross Stopper (ダブルクロスストッパー) attack alongside the Mantan Gun with Kishamoth's Soul.
 * Kankan Mantan Gun (カンカンマンタンガン): The combined form of the Mantan Gun and Kankanbar that can utilize three Engine Souls to perform the Kankan Kong Express (カンカンカンエクスプレス) finisher via the ancient Engines' Souls as well as a Speedor Version (スピードルバージョン) with Speedor, Bus-on, and BearRV's Souls.

Engines
The Go-ongers' mecha are the Engines (炎神), denizens of Machine World who pursued the Gaiark Clan to the Human World. Due to being unable to maintain their true giant sizes for longer than ten minutes without suffering from fatal rusting, they are forced to separate their Engine Souls from their Engine Casts (炎神キャスト) and choose the Go-ongers to assist them in keeping both safe. Through their bonds with their partners, the Engines are able to combine into stronger humanoid mecha forms.

With the Shinkengers' Origami, the Engines can perform the Modikara Cannonball (モヂカラキャノンボール) attack.
 * 1) Engine Speedor (炎神スピードル): Go-on Red's partner who resembles a race car and a condor. While in his true size, he can perform the Speedor Burst (スピードルバースト) attack, possesses incredible speed, and assume "Accel Full Throttle" mode, which allows him to glide and utilize his talons. Speedor is voiced by Daisuke Namikawa (浪川 大輔).
 * 2) Engine Bus-on (炎神バスオン): Go-on Blue's partner who resembles a bus and a lion. While in his true size, he possesses incredible strength and Bus-on Missiles (バスオンミサイル). Bus-on is voiced by Hisao Egawa (江川 央生).
 * 3) Engine BearRV (炎神ベアールＶ（ブイ）): Go-on Yellow's gutsy and spunky partner who resembles a four-wheel drive and a bear. While in her true size, she possesses V V Missiles (ブイブイミサイル) and can perform the BearR Attack (ベアールアタック) and the BearR Press (ベアールプレス) attack. As a member of Go-on Princess, she can perform the Princess Triple Attack or Princess Triple Punch alongside her fellow members. BearRV is voiced by Miki Inoue (井上 美紀).
 * 4) Engine Birca (炎神バルカ): Go-on Green's easy-going partner who resembles a motorcycle and an orca and displays a fondness for foreign words, having used Spanish, Italian, French, English, and Mandarin Chinese terms throughout the series. While in his true size, he wields the Bircutter (バルカッター) tail. Birca is voiced by Sōichirō Hoshi (保志 総一朗).
 * 5) Engine Gunpherd (炎神ガンパード): Go-on Black's justice seeking partner who resembles a police car and a German Shepherd. While in his true size, he possesses the Gunpherd Gun (ガンパードガン) nose and expert marksmanship. Gunpherd is voiced by Kenji Hamada (浜田 賢二).
 * 6) Engine Carrigator (炎神キャリゲーター): A member of the powerful Gian Race (ジャイアン族) of Engines who resembles a semi-trailer truck and an alligator and displays a samurai-esque personality. While in his true size, he can carry two Engines on his back and does not require a partner, though he requires the most time to recharge his Engine Soul. Carrigator is voiced by Kyousei Tsukui (津久井 教生).
 * 7) Engine Toripter (炎神トリプター): Go-on Gold's lively partner and a member of the rarely seen Wing Race (ウイング族) of Engines who resembles a helicopter and a chicken. While in his true size, he possesses rotors and turrets armed with an infinite supply of energy bullets that allow him to perform the Toripter Batariot (トリプターバタリオット) attack. Toripter is voiced by Shizuka Ishikawa (石川 静).
 * 8) Engine Jetras (炎神ジェットラス): Go-on Silver's calm partner and a member of the Wing Race who resembles a fighter jet and a tiger. While in his true size, he possesses Jetras Torahawk (ジェットラストラホーク) cruise missiles and can perform the Jetras Phantom (ジェットラスファントム) attack. Jetras is voiced by Kiyotaka Furushima (古島 清孝).
 * 9) Engine Jum-bowhale (炎神ジャン・ボエール): A veteran member of the Wing Race and the leader of the Wing Engines who resembles a Boeing 747 and a baleen whale. While in his true size, he can perform the Bowhale Beam (ボエールビーム) attack and assume a flying wing-like Jet Mode (ジェットモード) for increased speed. Jum-bowhale is voiced by Tomomichi Nishimura (西村 知道).
 * 10) Engine Kishamoth (炎神キシャモス): A peaceful member of the Ancient Engines (古代炎神) who resembles a steam locomotive and a mammoth and is incapable of speaking human languages due to arriving in the Human World, then called Dino World (ダイナワールド), during the Mesozoic to battle the Horonderthal before going into hibernation and reawakening in the present. While in his true size, he can perform the Ice Age Express (アイスエイジエクスプレス) attack.
 * 11) Engine T-line (炎神ティライン): A primitive member of the Ancient Engines who resembles a Shinkansen and a Tyrannosaurus, is also incapable of speaking human languages, and displays an intense hatred for the Savage Machine Clans.
 * 12) Engine K-line (炎神ケライン): A member of the Ancient Engines who resembles a Shinkansen and a Triceratops, is also incapable of speaking human languages, and specializes in breaking through enemy defenses with his horns.

Engine Combinations
The Engines can be assembled into larger mecha via Engine Combination (炎神合体). Together, they can perform the Go-on Kick (ゴーオンキック) and Go-on Punch (ゴーオンパンチ) attacks.


 * EngineOh (エンジンオー): The Go-ongers' first giant robot and the combination of Engines Speedor, Bus-on, and BearRV that is nicknamed the "Giant King of Engines" (巨大なる炎神の王). It is armed with the Go-on Sword (ゴーオンソード) and the V Shield (Vシールド) and can perform the Go-on Grand Prix (ゴーオングランプリ) finisher. With GunBirOh and SeikuOh, EngineOh can perform the Go-onger Storm (ゴーオンジャーストーム), Triple Punch (トリプルパンチ), and the Grand Prix Festival (グランプリフェスティバル) finishers. Additionally, EngineOh can combine with other Engines through Engine Armaments (炎神武装), which are as follows:
 * EngineOh Birca (エンジンオーバルカ): The combination of EngineOh and Engine Birca that can perform the Bircutter Slash (バルカッタースラッシュ) finisher.
 * EngineOh Gunpherd (エンジンオーガンパード): The combination of EngineOh and Engine Gunpherd that can perform the Gunpherd Gunfire (ガンパードガンファイヤー) finisher.
 * EngineOh Jetripter (エンジンオージェットリプター): The combination of EngineOh and Engines Toripter and Jetras that is equipped with the Toripter Rotor (トリプターローター) attack and Jetras Bow (ジェットラスボウ) and can perform the Jetori Bullseye (ジェットリブルズアイ) finisher.
 * EngineOh Jetras (エンジンオージェットラス): The combination of EngineOh and Engine Jetras that can perform the Go-On Bullseye (ゴーオンブルズアイ) finisher.
 * GunBirOh (ガンバルオー): The Go-ongers' second giant robot and the combination of Engines Birca, Gunpherd, and Carrigator that is nicknamed "Another King of Engines" (さらなる炎神の王). It can perform the Bircutter Storm (バルカッターストーム), Bircutter Wrist Return (バルカッター小手返し), Gunpherd Gunfire, and Bircutter Slash attacks, and the GunBir Grand Prix (ガンバルグランプリ) finisher. Like EngineOh, GunBirOh can also combine with other Engines through Engine Armaments, which are as follows:
 * GunBirOh Toripter (ガンバルオートリプター): The combination of Engines Gunpherd, Carrigator, and Toripter that can perform the Toripgun Batariot (トリプガンバタリオット) finisher.
 * GunBirOh Jetras (ガンバルオージェットラス): The combination of Engines Birca, Carrigator, and Jetras that can perform the Trabircutter Slash (トラバルカッタースラッシュ) finisher.
 * EngineOh G6 (エンジンオーG6): The combination of EngineOh and GunBirOh that can perform the G6 Kick (G６キック) attack and the G6 Grand Prix (G６グランプリ) finisher.
 * SeikuOh (セイクウオー): The Go-on Wings' personal giant robot that is nicknamed the "Sky Punching Aerial King" (空を制する天空の王). It can perform the Toripcutter (トリプカッター), Jetras Boomerang (ジェットラスブーメラン), Jetori Turbulence (ジェットリタービュランス), and Seiku Sonic (セイクウソニック) attacks and the Seiku Impulse (セイクウインパルス) finisher. Like EngineOh and GunBirOh, SeikuOh can combine with other Engines through Engine Armaments, which are as follows:
 * SeikuOh Birca (セイクウオーバルカ): The combination of Engines Birca, Jetras, and Jum-bowhale that can perform the Birtras Torahawk (バルトラストラホーク) finisher.
 * SeikuOh Gunpherd (セイクウオーガンパード): The combination of Engines Gunpherd, Toripter, and Jum-bowhale that can perform the Guntori Gunfire (ガントリーガンファイヤー) finisher.
 * EngineOh G9 (エンジンオーG9): The combination of EngineOh, GunBirOh and SeikuOh that can perform the G9 Grand Prix (G９グランプリ) finisher.
 * KyoretsuOh (キョウレツオー): The Go-ongers' third giant robot and the combination of the Ancient Engines that is piloted by Go-on Red and nicknamed the "Powerful King of Trains" (強大な列車の王). It can perform the Railway Chop (電車道チョップ), Dinosaur Kick (ダイナソーキック), Kyoretsu Dino Bite (キョウレツダイナバイト), and KishamoSteam (キシャモスチーム) attacks and the Kyoretsu Express (キョウレツエクスプレス) finisher.
 * EngineOh G12 (エンジンオーG12): The combination of all 12 Engines that is nicknamed the "Ultimate King Who Triumphs Over Evil" (全ての悪を制する究極の王). It can perform the G12 Punch (G12パンチ) and G12 Kick (G12キック) attacks and perform the G12 Grand Prix (G12グランプリ) and the G12 Final Grand Prix (G12ファイナルグランプリ) finishers. During the events of the crossover film Engine Sentai Go-onger vs. Gekiranger, EngineOh G12 can perform the Engine Beast Grand Prix (炎神ビーストグランプリ) finisher alongside the Gekirangers' mecha, SaiDaiGekiRinTohja.
 * Samurai Formation 23 (サムライフォーメーション23): The combination of EngineOh G12 and the Shinkengers' mecha SamuraiHaOh that can perform the Samurai Engine Super Grand Release (侍・炎神・スーパー大開砲) finisher and appears exclusively in the crossover film Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!
 * EngineOh G7 (エンジンオーG7): The Miracle Engine Combination (ミラクル炎神合体) of the Go-ongers and Go-on Wings' personal partners that can perform the 10 Years Grand Prix (10 Years グランプリ) finisher. This formation appears exclusively in the anniversary film Engine Sentai Go-onger: 10 Years Grand Prix.

Bomper
Bomper (ボンパー), short for "Born-to Outerdimension and Mechanic × Pitcrew-type ENGINE-support Robot", is a pink radar robot from Machine World who was created by Jum-bowhale and supports the Go-ongers by creating their arsenal and performing maintenance on the Engines.

Bomper is voiced by Akiko Nakagawa (中川 亜紀子).

Gaiark
The Barbaric Machine Clan Gaiark (蛮機族ガイアーク), are machine-men from the Machine World who seek to pollute the Braneworlds and whose numbers were scattered during their war with the Engines.

Pollution Ministers
Originally thought to be the last of the Gaiark, the three Pollution Ministers end up on Earth to pollute it to serve as an ideal paradise for them and based themselves at Hellgailles Palace (ヘルガイユ宮殿), which is powered by the Deus Haguru Magear (デウス・ハグル・マギア), an inexhaustible energy source that Yogostein brought with him from Machine World. Amidst their battle with Yogoshimacritein, the Go-ongers destroy the gear, causing Hellgailles Palace to self-destruct. During the events of the crossover film Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, the Pollution Ministers are rebuilt, but choose not to continue the Gaiark Clan's plans and run off to the bottom of the Sanzu River. As of the events of the anniversary film Engine Sentai Go-onger: 10 Years Grand Prix, the ministers settle down in Junk World, but accidentally give rise to the Zontark Clan and join forces with the Go-ongers to stop them.

Yogostein
Land Pollution Minister Yogostein (害地大臣ヨゴシュタイン), short for Baron Yogorex de Stein (バロン・ヨゴレックス・ド・シュタイン), is a serious-minded general who leads the Gaiark's Land Pollution Barbaric Machine Beasts and wields the Yogospear (ヨゴシュピア). After suffering a string of failures amidst his battles against the Go-ongers and losing his vice-minister, Hiramechimedes, whom he had total faith in, Yogostein goes into self-imposed exile to mourn and find himself before returning to personally seek violent revenge against the Go-ongers. Desiring the Horonderthal Clan's power, he awakens one of its members, lets the Go-ongers scrap it, and uses its parts to upgrade himself into the Horonderthal King in a failed attempt to kill Go-on Red and rust all of Japan. Despite his newfound power, he is weakened by EngineOh G12 and scrapped by Go-on Red in a final duel.

Yogostein is voiced by Kiyoyuki Yanada (梁田 清之), who also voices Yogoshimacritein.

Kitaneydas
Air Pollution Minister Kitaneydas (害気大臣キタネイダス) is the leader of the Gaiark's Air Pollution Barbaric Machine Beasts who wields the Kitaneybar (キタネイバー), can transform into smog, and perform the Air Pollution Attack (害気アタック). Amidst the Gaiark's war with the Engines, he experimented with Bikkurium's potent properties before using it on the Barbaric Machine Beasts. He arrives in the Human World with Yogostein and Kegalesia, but following the former's death, Yogoshimacritein's arrival, and being reduced to a living shield, a frustrated Kitaneydas and Kegalesia destroy the Bottomless Wastebin to weaken Yogoshimacritein, who scraps them in retaliation.

Kitaneydas is voiced by Mitsuaki Madono (真殿 光昭).

Kegalesia
Water Pollution Minister Kegalesia (害水大臣ケガレシア) is the leader of the Water Pollution Barbaric Machine Beasts who is armed with the Kegastick (ケガスティック), possesses regenerating artificial human-like skin, and can shoot steam from pipes on her back whenever she gets angry, which can cause her to enlarge if excess steam is produced. Amidst the Gaiark's fight with the Go-ongers, Kegalesia briefly breaks off from her fellow ministers to form the G3 Princess idol group to defeat a separate foe. Following Yogostein's death and Yogoshimacritein reducing her to a living shield, Kegalesia leads the Go-ongers to the Deus Haguru Magear before helping Kitaneydas destroy the Bottomless Wastebin to weaken Yogoshimacritein, who scraps them in retaliation.

Due to her nature as a Water Pollution branch member, she can perform the Water Pollution Fusion (害水合身) technique with any member of the same branch in order to boost both parties' power.

During the events of Engine Sentai Go-onger: 10 Years Grand Prix, amidst the Pollution Ministers' efforts to stop the Zontark Clan, Kegalesia borrows Go-on Yellow's transformation equipment and briefly transforms into Kega Yellow (ケガイエロー).

Kegalesia is portrayed by Nao Oikawa (及川 奈央).

Hiramechimedes
Land Pollution Vice-Minister Hiramechimedes (害地副大臣ヒラメキメデス) is Yogostein's subordinate and the Gaiark's top tactical genius. Originally a second-rate inventor who developed much of the Gaiark's arsenal, he plotted to assassinate Yogostein and take his position. However, the latter recognized the former's brilliance and awarded him with the yardstick-like Hacalibur (ハカリバー) sword and promoted him to Vice-Minister. This caused Hiramechimedes to loyally devote himself to Yogostein's cause and he would go on to inspire fear in the Engines after achieving numerous victories.

On the day the Gaiark were expelled from Machine World, Hiramechimedes disappeared to mount a failed attack on the Wing Clan Engines before resurfacing in the Human World months later to serve under Yogostein once more. When the Wing Engines pursue him and gain help from the Go-on Wings, Hiramechimedes stages his banishment from the Gaiark in a plot to deceive the Go-ongers and kill Go-on Gold. When the heroes foil him, an ashamed Hiramechimedes refuses to return to Yogostein and spends several days calculating a new plan to kill the Go-ongers. Eventually concluding he needs raw power instead of his intellect, he sneaks back into the Hellgailles Palace and infuses himself with one hundred times the Bikkurium required for a regular Barbaric Machine Beast to undergo an Industrial Revolution. However, the stress of his upgrade breaks his mind as he undergoes a "Big Industrial Revolution" and transforms into the insane Detaramedes (デタラメデス). He overpowers the Go-ongers, but is eventually scrapped by Go-on Red.

Despite this, his grudge against the Go-ongers keeps him from passing on. Unable to retake physical form and referring to himself as Urameshimedes (ウラメシメデス), he travels to the Braneworld of Samurai World, possesses a monstrous inhabitant named Bakki, and transforms further into Hirameki Bakki (ヒラメキ伐鬼) to take revenge on the Go-ongers, only to be exorcised by them.

Hiramechimedes is voiced by Kazuya Nakai.

Yogoshimacritein
Crime Minister Yogoshimacritein (総裏大臣ヨゴシマクリタイン) is the Gaiark's Insurgent Highness (デンカノボウトウ) and Yogostein's father who wields a two-headed Kanabō-like weapon. As the most ruthless member of the Gaiark Clan, he desired to rule over all of the Braneworlds, having oversaw the near-extinction of the Engines' Gian Race and the destruction of three Braneworlds. After Kireizky arrives in the Human World, Yogoshimacritein uses the former's Bottomless Wastebin to enter the Human World himself and use it to power his Justice Dissolution (正義解散) attack, which can convert targets into wavelengths so long as the Deus Haguru Magear is active. When he uses his Puppet Regime (傀儡傀儡政権) ability to turn Kitaneydas and Kegalesia into his puppets and reveals his willingness to sacrifice them, the Pollution Ministers assist the Go-ongers in destroying the Bottomless Wastebin and the Deus Haguru Magear to weaken Yogoshimacritein. He destroys his traitorous subordinates and utilizes the Third Industrial Revolution (第三次産業革命) ability to enlarge himself, but is scrapped by EngineOh G12.

Yogoshimacritein is voiced by Kiyoyuki Yanada, who also voices Yogostein.

Other members

 * Barbaric Machine Clan Arelunbra Family (蛮機族アレルンブラ家): Preceding the Gaiark as the Engines' mortal enemies, the Arelunbra Family were sea-based androids who terrorized Machine World with their Water Pollution Machine Knights (害水機士) before their leader Nigorl left for the Human World and the Arelunbra faded into legend.
 * Water Pollution Machine Knight Uzumaquixote (害水機士ウズマキホーテ): A servant of Nigorl who is armed with a jousting lance and shield with the ability to consume anything. After arriving in the Human World with Nigorl, Uzumaquixote became exposed to its clean surroundings, miniaturized, and trapped as a stone statue that a young Renn Kōsaka would find, assuming it to be a Ksitigarbha (地蔵) statue. In the present, the Gaiark and Go-on Wings discover and fight over the statue until Kegalesia revives Uzumaquixote and has him attack the Go-ongers. After ingesting Bikkurium and enlarging himself, Uzumaquixote is scrapped by SeikuOh, GunBirOh, and EngineOh. Uzumaquixote is voiced by Naomi Kusumi (楠見 尚己).
 * Water Pollution Prince Nigorl zo Arelunbra (害水王子ニゴール・ゾ・アレルンブラ): The prince of the Arelunbra who wields the Nigorl Rapier (ニゴールレイピア), possesses mastery in fencing, and the ability to summon rain clouds. Unlike other Gaiark members, he displays a liking towards things he considers beautiful. After pining for and being spurned by Kegalesia, he arrived in the Human World, but entered suspended animation. The Gaiark revive Nigorl in the present, who turns his affections towards BearRV and attempts to marry her. Using his Water Pollution Fusion ability, he enlarges himself without Bikkurium and forcibly interfaces with Kegalesia to transform into Mix Kegalegorl (ミックス・ケガレゴール), with Kegalesia as a battery to increase his power. Despite this, he is defeated by the Go-ongers and left to die by Kegalesia. Nigorl is voiced by Kenji Nojima (野島 健児).
 * Barbaric Machine Clan Horonderthal (蛮機族ホロンデルタール): A clan of ancient, giant clockwork Savage Machine Beasts that caused the extinction of the dinosaurs on Earth 65 million years ago with their violence-inducing Horonden Wave (ホロンデン波) attack. The Ancient Engines battled the Horonderthal until they and an individual clan member were fossilized within a mountain. In the present, Yogostein seeks out the Horonderthal and eventually succeeds despite freeing the Ancient Engines as well. After Yogostein upgrades the Horonderthal with modern Gaiark technology, it defeats the Ancient Engines, but is scrapped by EngineOh G12 while Yogostein claims the Horonderthal's power for himself.
 * Cleaning Minister Kireizky (掃治大臣キレイズキー): A Gaiark minister who "cleans" the slate of Braneworlds he has visited in order to acquire a special form of energy called Dokkirium (ドッキリウム). He is armed with Seven Cleaning Tools (オソウジ七つ道具): the Duster Blade (ハタキブレード), the Broom Shotgun (ホウキショットガン), the Anti-Soul Rag (アンチソウルゾーキン), which can be wrung out into the Rag Grenade (ゾウキングレネード), the Dustpan Shield (チリトリシールド), the Cotton Swab Kunai (メンボークナイ), the Bottomless Wastebin (ムゲンゴミバコ), and the Bucket Bazooka (バケツバズーカ). After destroying the Braneworlds of Sound World, Magic World, and Prism World (プリズムワールド) as part of his quest, he arrives in the Human World to battle the Go-ongers until he loses his Wastebin. He ingests the Dokkirium he had collected and undergoes a Super Industrial Revolution (超産業革命) to overpower the Go-ongers and Engines, but they form EngineOh G12 to defeat Kireizky. However, the Wastebin would later allow Yogoshimacritein to enter the Human World. Kireizky is voiced by Eiji Takemoto (竹本 英史).
 * Danger Cabinet-Director Chirakasonne (危官房長官チラカソーネ): Yogoshimacritein's boiler-themed right-hand and practitioner of the Natural Litter Constitution Kenpō (天地羅苛死憲法) fighting style. Chirakasonne ingests Dokkirium and enlarges, but is scrapped by GunBirOh. Chirakasonne is voiced by Bin Shimada (島田 敏).

Arsenal

 * Barbaric Machine Soldiers Ugatz (蛮機兵ウガッツ): Android foot soldiers built to support the Barbaric Machine Beasts and pilot the Barbaric Dohmas. Additionally, Nigorl possesses a feminine variant called Beauty Ugatz (ビューティウガッツ), which are stronger than regular Ugatz. During the events of the crossover film Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!, Batcheed utilizes Ugatz capable of transforming into motorcycles.
 * Barbaric Dohma (蛮ドーマ): Cave cricket-like jet fighters invented by Hiramechimedes that can assume a frog-like walking mode.
 * Barbaric Dohma SP (Special) (蛮ドーマSP): Cave cricket and mantis-like jet fighters that serve as Hiramechimedes and the Pollution Minsters' personal transports that are each able to carry up to four Barbaric Dohma.

Barbaric Machine Beasts
The Barbaric Machine Beasts (蛮機獣) are monsters created by the Pollution Ministers to pollute the Earth and are, as such, usually divided into four types: Order Land Pollution (害地目), Order Water Pollution (害水目), Order Air Pollution (害気目), and Order Land/Water/Air Special (害地水気スペシャル目). The Barbaric Machine Beasts are infused with a special energy called Bikkurium (ビックリウム) that is capable of enlarging them in a process called Industrial Revolution (産業革命) and are based on machines or inventions that were present at the turn of the twentieth century. If they are scrapped, the dead Barbaric Machine Beasts shrink back to normal size and end up at the Barbaric Machine Beast Graveyard. In the film Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!, Yogostein takes advantage of this by developing the Barbaric Machine Beast program to utilize Ugatz souls to reanimate the Barbaric Machine Beasts into the Recycled Barbaric Machine Beast Army (リサイクル蛮機獣軍団), only for them to be re-scrapped by the Engines due to being much weaker than they used to be.

Land Pollution Barbaric Machine Beasts

 * Scoop Banki (スコップバンキ): A shovel-themed Barbaric Machine Beast equipped with shovel-like gauntlets. He is sent by Yogostein to attack Neo Tokyo Hills, only to be defeated by the Go-ongers. Scoop Banki enlarges, but is scrapped by EngineOh. Scoop Banki is voiced by Tamotsu Nishiwaki (西脇 保).
 * Jishaku Banki (ジシャクバンキ): A magnet-themed Barbaric Machine Beast capable of manipulating electromagnetic forces. He is sent by Yogostein to attack the Go-ongers, who manage to defeat him. Following this, Jishaku Banki is upgraded into the electromagnet-themed Denjishaku Banki (デンジシャクバンキ) and uses his increased power to overwhelm the Go-ongers until Go-on Green destroys his power source. Denjishaku Banki enlarges, but is scrapped by EngineOh Birca. Jishaku and Denjishaku Banki are voiced by Toshiharu Sakurai (桜井 敏治).
 * Boring Banki (ボーリングバンキ): A boring machine-themed Barbaric Machine Beast sent by Yogostein to destroy Japan by extracting magma, only to be defeated by the Go-ongers. Boring Banki enlarges, but is scrapped by EngineOh and GunBirOh. Boring Banki is voiced by Naoki Imamura (今村 直樹).
 * Hatsuden Banki (ハツデンバンキ): An electric generator-themed Barbaric Machine Beast who possesses electrokinesis. Following a mishap wherein he accidentally switches bodies with Go-on Red before the Go-ongers reverse the process, Hatsuden Banki enlarges, but is weakened by a cold that Go-on Red was suffering from and scrapped by EngineOh G6. Hatsuden Banki is voiced by Nobuyuki Hiyama (檜山 修之).
 * Happa Banki (ハッパバンキ): A dynamite-themed Barbaric Machine Beast and Yogostein's "number one hooligan" with destructive capabilities. Yogostein sends him to destroy the city, but is foiled by the Go-on Wings. Despite receiving help from Yogostein and Hiramechimedes, Happa Banki is scrapped by Go-on Gold, who takes his Bikkurium to prevent him from enlarging. Happa Banki is voiced by Masaharu Satō (佐藤 正治).
 * Nokogiri Banki (ノコギリバンキ): A saw-themed Barbaric Machine Beast equipped with a saw blade arm capable of cutting through any material. He is sent by Yogostein to attack the city, but he focuses on attacking objects that are taller than him instead until the Go-ongers exploit the loose bolt holding his saw arm together. Nokogiri Banki enlarges, but is scrapped by EngineOh G6. Following this, Hiramechimedes collects his remains, rebuilds him into the stronger Chainsaw Banki (チェーンソーバンキ) to remove his weaknesses, and tasks him with attacking the Go-ongers and Go-on Wings while polluting the skies. However, Jum-bowhale thwarts Chainsaw Banki's plans. The latter enlarges, but is scrapped by SeikuOh. Nokogiri and Chainsaw Banki are voiced by Takayuki Godai (五代 高之).
 * Bōseki Banki (ボーセキバンキ): A spinning mule-themed Barbaric Machine Beast capable of firing streams of yarn to immobilize targets. She is tasked by Yogostein with aiding Hiramechimedes in staging a false attempt on his life. After undergoing an "Original Industrial Revolution" (元祖産業革命) however, she is scrapped by EngineOh G9. Bōseki Banki is voiced by Rica Matsumoto (松本 梨香).
 * Hammer Banki (ハンマーバンキ): A namesake-themed Barbaric Machine Beast that Yogostein infused with his hatred. As a result, the former is compelled to destroy everything in sight, to the point of disobeying Yogostein. Hammer Banki enlarges, but is scrapped by EngineOh G9 and the Go-Roader GT. Hammer Banki is voiced by Riki Kitazawa (北沢 力).
 * Drill Banki (ドリルバンキ): A namesake-themed Barbaric Machine Beast and the strongest of the Savage Land models armed with a drill horn. He is sent by Yogostein to locate the Horonderthal, only to accidentally awaken the Ancient Engines. Drill Banki enlarges, but is scrapped by KyoretsuOh. Drill Banki is voiced by Chihiro Suzuki (鈴木 千尋).

Air Pollution Barbaric Machine Beasts

 * Shoukyaku Banki (ショウキャクバンキ): An incinerator-themed Barbaric Machine Beast capable of placing objects in his forehead furnace and converting it into smog for use in his attacks, with flowers and any objects he considers pretty improving the smog's toxicity. He is sent by Kitaneydas to use his abilities on Japan, but is foiled by the Go-ongers, forcibly enlarged by the Pollution Ministers, and scrapped by EngineOh. Shoukyaku Banki is voiced by Takashi Nagasako (長嶝 高士).
 * Speaker Banki (スピーカーバンキ): A namesake-themed Barbaric Machine Beast capable of converting beautiful sound waves into noise pollution with his microphone spear before producing the resulting sound waves from his speakers. After receiving an upgrade that allows him to generate a sound barrier capable of blocking most attacks, Speaker Banki enlarges, only to be scrapped by EngineOh Gunpherd. Speaker Banki is voiced by Issei Futamata (二又 一成).
 * Lens Banki (レンズバンキ): A camera lens-themed Barbaric Machine Beast capable of teleporting targets to the Braneworld of Junk World and utilizing the Braneworld's ability to mechanize people. Kitaneydas creates Lens Banki to assist in his plan to create new Ugatz. Despite enlarging and being scrapped by EngineOh and GunBirOh, Lens Banki takes pictures of the mecha, which the Pollution Ministers incorporate into Kagami Banki. Lens Banki is voiced by Kōichi Tōchika (遠近 孝一).
 * Antenna Banki (アンテナバンキ): A namesake-themed Barbaric Machine Beast capable of firing lasers and interfering with television signals and replacing them with his own hypnotic signals capable of forcing people to pollute their surroundings. He is sent by Kitaneydas to drive the Go-ongers apart, only to be thwarted by the latter. Antenna Banki enlarges, but is scrapped by GunBirOh. Antenna Banki is voiced by Hideaki Kusaka (日下 秀昭).
 * Vacuum Banki (バキュームバンキ): A vacuum cleaner-themed Barbaric Machine Beast. He is sent by Kitaneydas to kill the Go-on Wings, only to be defeated by them and Go-on Red. Vacuum Banki enlarges, but is scrapped by EngineOh Jetripter. Vacuum Banki is voiced by Taiki Matsuno (松野 太紀).
 * Fūsen Banki (フーセンバンキ): A balloon-themed Barbaric Machine Beast nicknamed the "Tiger of Balloons" who possesses a rubbery body that makes him immune to physical attacks, the ability to inflate targets, and weaponized smog-filled balloons. He is sent by Kitaneydas to distribute his balloons to children, but the Go-on Wings foil his plot. Fūsen Banki enlarges, but is scrapped by SeikuOh. Fūsen Banki is voiced by Ippei Hara (原 一平).
 * Dowsing Banki (ダウジングバンキ): A dowsing rod-themed Barbaric Machine Beast who wields a pair of tonfa that double as dowsing rods. She is sent by Kitaneydas to locate an object that landed in the mountains and distract the Go-ongers while he uses the object to bury the Human World in trash. She enlarges, but is scrapped by EngineOh G9. Dowsing Banki is voiced by Harumi Edo (エド・はるみ).
 * Heater Banki (ヒーターバンキ): A namesake-themed Barbaric Machine Beast who wields the Burning Coil (灼熱コイル) batons. He is sent by Kitaneydas to cause heat waves and target Japan's gas tanks, only to be foiled by the Go-ongers. Heater Banki enlarges, but is scrapped by KyoretsuOh. Heater Banki is voiced by Atsushi Imaruoka (伊丸岡 篤).
 * Engine Banki (エンジンバンキ): A giant namesake/truck-themed Barbaric Machine Beast created to resemble EngineOh who possesses a trucker-esque personality and the ability to transform into a gas guzzling dekotora. He is sent by Kitaneydas to avenge Yogostein by polluting the Human World with his exhaust fumes. However, Engine Banki is shrunk by Go-on Gold via the Kankanbar and scrapped by Go-on Red via the Kankan Mantan Gun. Engine Banki is voiced by Tetsu Inada (稲田 徹).
 * Yatai Banki (ヤタイバンキ): A namesake-themed Barbaric Machine Beast that Kitaneydas tasks with capturing children for the latter's plot to subjugate the world to endless festive fun before tasking him with capturing two boys from the Braneworld of Samurai World instead. Yatai Banki enlarges, but is scrapped by EngineOh, GunBirOh, and SeikuOh. Yatai Banki is voiced by Kōichi Sakaguchi (坂口 候一).
 * Dumbbell Banki (ダンベルバンキ): A namesake-themed Barbaric Machine Beast built to be the strongest of the Savage Sky models capable of polluting the air with carbon dioxide through his heavy breathing and aided by a pair of Ugatz who remotely operate his arms, which he cannot lift by himself. He enlarges, but is scrapped by SeikuOh and the Go-Roader GT. Dumbbell Banki is voiced by Yūji Kishi (岸 祐二).

Water Pollution Barbaric Machine Beasts

 * Pipe Banki (パイプバンキ): A drainage pipe-themed Barbaric Machine Beast capable of producing sludge from his pipework body. Kegalesia sends him to test his powers at a dam before he enlarges to pollute Shindaiba, only for the latter to be scrapped by EngineOh. Pipe Banki is voiced by Takayuki Kondō (近藤 孝行).
 * Spray Banki (スプレーバンキ): A clumsy yet overeager spray bottle-themed Barbaric Machine Beast capable of shooting acid from his mouth. He is sent by Kegalesia to steal Birca's Engine Cast, only to be wounded by his target and Gunpherd. Spray Banki enlarges, but is scrapped by EngineOh. Spray Banki is voiced by Antoki no Inoki (アントキの猪木).
 * Bombe Banki (ボンベバンキ): A gas cylinder-themed Barbaric Machine Beast capable of firing a Red Rust Beam. Kegalesia sends him to eliminate EngineOh, but is thwarted by Carrigator. Refusing to give up, he allows himself to be defeated in order to enlarge and try again, only to be scrapped by GunBirOh. Bombe Banki is voiced by Masato Hirano (平野 正人).
 * Hikigane Banki (ヒキガネバンキ): A trigger-themed Barbaric Machine Beast who is reputed to be the Gaiark Clan's top sniper. Kegalesia sends him to capture an alien girl named Būkorin and bring her back to her father Gego in exchange for weapons, only to be defeated by the Go-ongers. Hikigane Banki enlarges, but is scrapped by EngineOh G6. Hikigane Banki is voiced by Yasuaki Takumi (内匠 靖明).
 * Kama Banki (カマバンキ): A bath heater-themed Barbaric Machine Beast capable of shrinking and teleporting people to the miniature hot springs on his head via mist emitted from his nostrils. He is sent by Kegalesia to remove any interference to the Gaiark Clan's operations, during which he gains increased power after attaining enlightenment. Despite this, he is defeated by a love-filled Go-on Green. Kama Banki enlarges, but is scrapped by EngineOh G6. Kama Banki is voiced by Tamio Ōki (大木 民夫).
 * Oil Banki (オイルバンキ): A namesake-themed Barbaric Machine Beast capable of producing slippery oil slick that can incapacitate normal vehicles and the land-based Engines. After being defeated by Toripter and Jetras, Hiramechimedes gives Oil Banki wings in order to combat them. Despite enlarging, EngineOh and GunBirOh use giant mops to scrap Oil Banki. Oil Banki is voiced by Taketora (武虎).
 * Manhole Banki (マンホールバンキ): A manhole cover-themed Barbaric Machine Beast capable of moving at superhuman speed and shooting manhole covers. Kegalesia sends him to kidnap pen spinners as part of Kitaneydas' plan to power his Destructive Sound Machine and destroy the city. Manhole Banki enlarges, but is scrapped by EngineOh G9. Manhole Banki is voiced by Kentarō Itō (伊藤 健太郎).
 * Straw Banki (ストローバンキ): A drinking straw-themed Barbaric Machine Beast capable of forcing targets to breathe out poisonous gas and three bottles that grant the ability to produce explosive soap bubbles, a smokescreen, and a bubble prison. Kegalesia develops a drink capable of enhancing his abilities and evil tendencies, but Straw Banki is defeated by Go-on Red and Speedor via the Go-Roader GT. Straw Banki enlarges, but is scrapped by BearRV, Bus-on, SeikuOh, and GunBirOh. Straw Banki is voiced by Yasuhiro Takato (高戸 靖広).
 * Shower Banki (シャワーバンキ): A namesake-themed Barbaric Machine Beast created by Kegalesia with the intention of producing acid rain, only to temporarily freeze men and sentient male organisms instead. Upon realizing what happened, Kegalesia gives Shower Banki "Super Ultra Gorgeous Acid Rain" and tasks her with killing the male Go-ongers, only for the latter to be defeated by Go-on Yellow and Silver and BearRV via the Go-Roader GT. Shower Banki enlarges, but is scrapped by GunBirOh Jetras and SeikuOh Gunpherd. Shower Banki is voiced by Hiromi Tsuru (鶴 ひろみ).
 * Bin Banki (ビンバンキ): A weak bottle-themed Barbaric Machine Beast who can produce hot water. In light of his weakness, Kegalesia manipulates Manabu Yushima into upgrading Bin Banki into the magic-capable, thermos-themed Mahōbin Banki (マホービンバンキ). After being depowered and enlarging however, Mahōbin Banki is scrapped by KyoretsuOh. Bin and Mahōbin Banki are voiced by Wataru Takagi (高木 渉).

Land/Water/Air Special Barbaric Machine Beasts

 * Kagami Banki (カガミバンキ): A mirror-themed Barbaric Machine Beast created by all three Pollution Ministers who is capable of reflecting the Engines' attacks via Lens Banki's pictures. After being upgraded with extra Bikkurium and enlarging, Kagami Banki is scrapped by EngineOh G6. Kagami Banki is voiced by Junpei Morita (森田 順平).
 * Kettei Banki (ケッテイバンキ): A draconic, chimeric Barbaric Machine Beast that Kitaneydas and Kegalesia modeled after all of its Barbaric Machine Beast predecessors, whose powers Kettei Banki is capable of utilizing. Kettei Banki enlarges, but is scrapped by EngineOh, KyoretsuOh, and SeikuOh. Kettei Banki is voiced by Daisuke Gōri (郷里 大輔).

Other Barbaric Machine Beasts

 * Mic Banki (マイクバンキ): A microphone-themed Air Pollution Barbaric Machine Beast who is scrapped by EngineOh and appears exclusively in the special drama sessions of the first Engine Sentai Go-onger soundtrack.
 * Hedoro Banki (ヘドロバンキ): A sludge-themed Water Pollution Barbaric Machine Beast who is scrapped by EngineOh and GunBirOh and appears exclusively in the special drama sessions of the first Engine Sentai Go-onger soundtrack.
 * Kussaku Banki (クッサクバンキ): An excavator-themed Land Pollution Barbaric Machine Beast who is scrapped by EngineOh G6 and appears exclusively in the Engine Sentai Go-onger tie-in manga.
 * Okunote Banki (オクノテバンキ): A Barbaric Machine Beast who appears exclusively in the stage show Aerial Warriors! The Go-on Wings Appear!! (天空の戦士！ゴーオンウイングス登場！！).
 * Nunchaku Banki (ヌンチャクバンキ): A namesake-themed Land/Water/Air Special Barbaric Machine Beast created by Rin Jūken Akugata engineer Meka capable of performing Ringi fighting techniques. After receiving the Dōkokugan Soul, Nunchaku Banki gains increased power until he is defeated by Go-on Red and Geki Red and possessed by Long. Nunchaku Banki is voiced by Takahiro Yoshimizu (吉水 孝宏).

Guest characters

 * Samurai World (サムライワールド): A Braneworld that resembles Feudal Japan and was under the dictatorship of Empress Maki and her Yōma until the Go-ongers end up in the Braneworld by accident and help overthrow her during the events of the film Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!. The Go-ongers would later learn that Samurai World contains doppelgangers of Human World inhabitants, with the corresponding pairs' souls being linked to each other.
 * Bakki (伐鬼（ばっき）): A deforestation-themed Yōma recruited by the spectral Urameshimedes to help him kill the Go-ongers in exchange for being allowed to destroy Human World's forests. Urameshimedes later possesses Bakki to fulfill his revenge, but the latter is killed by EngineOh G9.
 * Rairaiken (雷々剱) and Gokugokumaru (獄々丸): A pair of crimson Yōma and Maki's servants, the former a leonine monster who wields a kusarigama/kusarifundo-like weapon and the latter an ursine monster who wields sharp claws and a large shuriken. Following Maki's death, they pursue a pair of brothers from their world to the Human World to steal the Engine Sword and use Engine Dai-Shogun for evil. After the Go-ongers foil their plan, the Yōma ingest Bikkurium to perform their Fukoku Kyohei (富国強兵) enlargement technique, only to be killed by Engine Dai-Shogun. Rairaiken and Gokugokumaru are voiced by Naoya Uchida (内田 直哉) and Masaya Matsukaze (松風 雅也) respectively.
 * Harunosuke (晴之助) and Akinosuke (昭之助): Young brothers who came to the Human World to protect the Engine Sword. Harunosuke and Akinosuke are portrayed by Shohei Yamauchi (山内 翔平) and Hiroto Araki (荒木 博斗) respectively.
 * Osen (オーセン): A tech-sorceress from Junk World (ジャンクワールド), a Braneworld that resembles a junkyard due to an invention of Osen's that can multiply garbage and turns any organic into scrap metal. She travels to the Human World and assumes a human form after being deceived by Kitaneydas into thinking that her Braneworld was in danger of an invasion from the Human World and use her machine to give the Gaiark Clan an advantage. After meeting Hanto Jō and seeing his kindness however, she reverses her machine's polarity and helps the Go-ongers defeat the Gaiark before returning to Junk World. Osen is portrayed by Hana Kino (木野 花).
 * Lumbiaco (ロムビアコ): A monster from the Braneworld of Sound World (サウンドワールド) who comes to the Human World to feed on its noises, growing in size in the process. Due to the threat of it becoming large enough to crush Earth, the Go-ongers and Gaiark make repeated attempts to shrink it via a beautiful sound, only to fail until Saki Rōyama, Miu Sutō, and Kegalesia form the G3 Princess idol group in order to destroy Lumbiaco.
 * Wameikle (ワメイクル): An amphibian from Stormy World (ストーミーワールド), a Braneworld bombarded by endless wind storms. After ending up in the Human World due to the Gaiark Clan's influence, Hiroto Sutō finds a Wameikle egg, with the hatching creature imprinting on him. Due to Gaiark attacks, the baby immediately grows into its adult form and goes on a rampage before using its high-pitched sonic cries to break the dimensional barrier between the Human World and Stormy World. Once Hiroto calms it down, Wameikle returns to its native Braneworld. Wameikle is voiced by Chika Sakamoto (坂本 千夏).
 * Manabu Yushima (湯島 学): An intelligent high school student who by chance found a Mage's Wand (魔法の杖) and its accompanying spell book, both of which came from Magic World (マジックワールド), a Braneworld that was home to many sorcerers until Kireizky destroyed it. After using his laptop to decipher the spell book and falling in love with Miu Sutō, Yushima attempts to win her over by magically infusing Bin Banki with magical powers. While working with Miu to de-power Bin Banki however, Yushima accidentally destroys his laptop. Manabu Yushima is portrayed by Ren Mori (森廉).
 * Santa Claus (サンタクロース): A being from Christmas World (クリスマスワールド), a Braneworld where the holiday season is endless, everyone dresses like Santa, and are able to travel to other Braneworlds by train. Using the Different Dimension Present Bag (異次元プレゼント袋) he carries with him, Santa can take out presents from Christmas World and bring them into other Braneworlds. Santa Claus is portrayed by Kinzo Sakura (桜 金造).

Spin-off exclusive characters

 * Empress Maki (女帝・魔姫): The heartless ruler of Samurai World who commands of army of Yōma to terrorize her Braneworld and appears exclusively in the film Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!. She attained her power after tricking the Honōshū into separating themselves from their Engine Casts, which she used to purge herself and Samurai World's denizens of all feelings except for rage and violence. However, the Go-ongers stumble onto her tyranny, with Go-on Red joining forces with the Honōshū to defeat her. In retaliation, she fuses herself with Retsu-Taka's cast to transform into a giant centipede-headed hydra until Go-on Red recovers the cast, forcing Maki into her true form before she is killed by Engine Dai-Shogun. Empress Maki is portrayed by Sonim (ソニン).
 * Raiken (雷剱) and Gokumaru (獄丸): Two of Maki's strongest Yōma who were created from Shishi-no-Shin and Tsuki-no-Wa's respective Engine Casts and can assume vehicle forms as a result. Individually, Raiken is a blue leonine monster who wields a kusarigama/kusarifundo-like weapon while Gokumaru is a golden ursine monster who wields sharp claws and a large shuriken. The pair assist Maki in her tyranny until they are killed by Go-on Blue, Yellow, Green, and Black and the Go-on Wings. Raiken and Gokumaru are voiced by Naoya Uchida (内田 直哉) and Masaya Matsukaze (松風 雅也) respectively.
 * Wandering Engines (流れ炎神): Three Samurai World Engines and the counterparts of Engines Speedor, Bus-on, and BearRV who lost their Engine Casts and hearts to Maki's magic and appear exclusively in the film Engine Sentai Go-onger: Boom Boom! Bang Bang! GekijōBang!!. In an attempt to gain the strength needed to fight back and restore themselves, their souls assumed human forms called Honōshū (炎衆). After encountering the Go-ongers, the Honōshū successfully regain their casts and utilize the "Engine Entering Soul" (炎神入魂) technique to merge into the Samurai World equivalent of the Go-ongers' EngineOh, Engine Dai-Shogun (炎神大将軍), which wields the flaming Engine Sword (炎神剣). After defeating Maki however, the trio exhaust their energy, causing their souls to fade away while their casts turn to stone.
 * Retsu-Taka (烈鷹): A young samurai and the leader of the Honōshū whose true form is Engine Retsu-Taka (炎神烈鷹), Speedor's Samurai World counterpart. Prior to forming Engine Dai-Shogun, he transferred part of his soul into the Engine Sword and entrusted it to two brothers to ensure his Engine Cast can never be used for evil. Retsu-Taka is portrayed by Kento Handa (半田 健人).
 * Shishi-no-Shin (獅子之進): An older samurai who wields a naginata and whose true form is Engine Shishi-no-Shin (炎神獅子之進), Bus-on's Samurai World counterpart. Shishi-no-Shin is portrayed by Jyunichi Haruta (春田 純一).
 * Tsuki-no-Wa (月之輪): A young kunoichi whose true form is Engine Tsuki-no-Wa (炎神月ノ輪), BearRV's Samurai World counterpart. Tsuki-no-Wa is portrayed by Mika Kikuchi (菊地 美香).
 * Kokorootomedes (ココロオトメデス): Hiramechimedes' effeminate, flamboyant, cross dressing, older brother who wields the Kiradecolibur (キラデコリバー) and appears exclusively in the DVD-exclusive special It's a Seminar! Everyone GO-ON!!. He challenges Go-On Red in an attempt to avenge his younger brother. After being defeated however, Kokorootomedes upgrades himself into a berserker form with a Yakuza-inspired personality that allows him to utilize a dirty fighting style, only to be scrapped by Go-on Red via the Kankan Mantan Gun. Kokorootomedes is voiced by Kazuya Nakai, who also voices Hiramechimedes.
 * Pollution President Batcheed (害統領バッチード): The new leader of Gaiark who appears exclusively in the crossover film Samurai Sentai Shinkenger vs. Go-onger: GinmakuBang!!. While conquering the Western-themed Braneworld of Gunman World (ガンマンワールド), he encounters and battles the Go-ongers before using a dimensional rift to enter the Human World, where he joins forces with the Gedoushu so he can use their Sanzu River's water to complete his Batchrium Plant (バッチリウムプラント) and pollute all of the Braneworlds. After enlarging himself and combining with the Batchrium Plant, he is scrapped by the Go-ongers and Shinkengers' Samurai Formation 23. Batcheed is voiced by Banjō Ginga (銀河 万丈).
 * Eleki Clan Zontark (エレ機族ゾンターク): A clan born from Junk World's electronic waste and the revived Gaiark Pollution Ministers who had conquered the Braneworld three years prior to the events of Engine Sentai Go-onger: 10 Years Grand Prix.
 * Noizun (ノイーズン): The leader of Zontark who assumes a human form called Shinichiro Noizumi (野泉 進一郎), Japan's Minister of Defense. In an attempt to conquer the Human World, he isolates it with the Country-Closing Barrier (鎖国バリア) and gives out N Chips (Nチップ) to turn people into his servants, Noizumi Children (野泉チルドレン). However, the Go-ongers foil his schemes and, after he enlarges, scrap him with EngineOh G7. Noizun is voiced by Satoshi Jinbo (神保 悟志), who also portrays his human form.
 * Grayzky (グレイズキー): The deputy leader of Zontark who assumes a human form called Taku Kurei (暮井 拓), the leader of a special police force. He is scrapped by Go-on Green and Black. Grayzky is voiced by Yuu Kamio (神尾 佑), who also portrays his human form.