Galvanax Galvanax
The champion of the powerful Galaxy Warriors TV Show and now their leader. He is intent on retrieving the Ninja Nexus Star so he can absorb their power. When Dane Romero causes it to split into Six Power Stars, Galvanax realizes that he can't retrieve them from the Prism. Brody escapes with the Prism to Earth. Supporting no more that the Rangers get the upper hand over his warriors, Galvanax uses his magnet recently acquired to steal five Power Stars. He leaves Brody with a choice: either he gives him his star to complete his collection or the Rangers will be destroyed. Brody decides to destroy his Power Star with his father's sword. He sees the three Red Ninja Power Stars and tries to steal them by breaking the Nexus Prism with his lance but unsuccessfully. Galvanax fights the Rangers. While melting the ninja steel with his lance, then drinks all the Ninja Steel and uses his new powers to knock down the Rangers. Galvanax orders Cosmo to gigantify him and Galvanax is attacked by a magnetic beam sent from the Warrior Dome Ship, which pulls all the ninja steel he drank. When he asks who dares betray him and he will get them for this, he hears Madame Odius shouted at him that Ripcon wasn't a traitor but that it was her. Then the asteroid containing ninja steel attracted by the magnetic beam, destroys it by colliding the Warrior Dome Ship and sends it into space. He gets ready to crush them but the Rangers join the Nexus Prism to launch a final attack and Galvanax is finally destroyed by 8 Ninja Steel Rangers.

Ripcon Ripcon
Ripcon is one of Galvanax's Galaxy Warriors. Ripcon helped Galvanax make off with Brody as a child. Years later, Ripcon loses one of his horns thanks to Brody's attack. Ripcon later figured out Madame Odius' plot that involved the Gold Ranger. The Aiden Romero android has Ripcon help him cause havoc in Summer Cove so that he can find the Ninja Steel Rangers' base. Using the Ninja Fusion Star, Brody uses the Ninja Fusion Fury Final Attack to defeat Ripcon. Though Ripcon got away. Upon being given a final chance by Galvanax and being framed for being the one who held Levi Weston on his ship, Ripcon is made giant along with two Skullgators to help him. The Ninja Fusion Zord destroy Ripcon.

Madame Odius Madame Odius
Madame Odius pitched an idea to Galvanax in order to make new stars upon acquiring the Ninja Steel. Madame Odius plotted against him but she had successfully obtained the Gold Ninja Power Star. She begins by doing an experiment on it in a secret room on the ship with a civilian that she captured, a country singer named Levi Weston, whom Madame Odius captured in the same time after Levi pulled out the Gold Ninja Power Star from the Prism. However, the Astro Zord found and rescued Levi and escaped to Earth. Madame Odius later created the Aiden Romero android using Levi Weston's memories in order to get close to the Ninja Steel Rangers' base. Upon the robot's destruction, Madame Odius pinned the blame for its creation of Ripcon. Odius ropes in Victor and Monty into building the Mega-Magnet to help her in destroying the Rangers and Galvanax. Upon Galvanax being enlarged, Odius activated the Mega-Magnet to attract every Ninja Steel present including Galvanax as Odius reveals her motives. However, the Ninja Steel meteor is also attracted as it hit Galvanax' ship. Though Madame Odius survives at the unexpected meteor strike. She takes over command and is assisted by Badonna and Tynamon. Odius kidnaps Mick and orders him to get the Nexus Prism and make a mind control satellite. She steals the super steel and the prism. She then orders Mick to create a new star for her and orders Dane Romero (who was also under her control) to distract the Rangers. Hayley destroys the satellite but the Prism finishes the star allowing her to tap into her final form. The Rangers combined their ninja stars and tap into the Nexus power. To defeat her, they first combined their Star Blades to unleash the Ultimate Nexus Blast which she countered with her Dark Nexus Strike, Brody gave her a final chance to surrender but she refused. They ran towards each other, being face to face in a wall of energy which soon culminated in an explosion. The Rangers leaped into the skies and unleashed the Nexus Ninja Strike, Steel Slash on Odius' ultimate form. Fatally wounded, Odius cursed the Rangers shortly before reverting back to her normal form and exploding.

Cosmo Royale Cosmo Royale
Cosmo Royale is the energetic alien host of "Galaxy Warriors" who commentates on the fights that are seen on "Galaxy Warriors." Outside of unleashing the Buzzcams to record the fights from his top hat and keeping an eye on the ratings, Cosmo Royale is responsible for operating the Stage Machine where the blue button activates the Gigantify Ray that would be used on a defeated contestant and the red button unleashes a Skullgator. The yellow button is revealed to send someone to Earth when Victor and Monty use it to escape from the Warrior Dome Ship. Victor and Monty nearly trick Cosmo Royale into sending them off the ship while disguised as Kudabots. Though Cosmo Royale figured it out and unleash the Bashers on them. When the Ninja Steel meteor struck Galvanax' ship and sent it far into space, it is unknown if Cosmo Royale survived the meteor strike or not.

Kudabots Kudabots
The Kudabots are Galvanax's robotic foot soldiers in kasas that are armed with yari spears and tanegashimas. Two Kudabots are known for bringing the unidentified Stage Machine onto the stage when it comes to the decision on if the contestant should be hit with the Gigantify Ray.

Buzzcams Buzzcams
The Buzzcams are fly-type cameras that are kept under Cosmo Royale's top hat. They are unleashed by Cosmo Royale in order to film the fights on "Galaxy Warriors."

Skullgators Skullgators
The Skullgators are Gashadokuro-themed alligator monsters that serve as the giant foot soldiers for Galvanax. They would often be dispatched to fight the Zords upon Cosmo Royale pushing the red button on the Stage Machine.

Badonna
Badonna
Badonna was an outlaw for Sledge but became the secondary villain as a general then second in command for Madame Odius. She clearly has a disdain for being treated like a tool. She immediately pledged her loyalty in a desperate way to escape from her captor. Over time, she has been proven to be Odius' ideal right hand woman by willingly to go along with her plans and will attend to be assertive by any means to protect Odius or even scolding an acquaintance to make that person obey Odius. During the Rangers' attack, she and Cosmo are both furious that they released Ms. Odius' soldiers. Victor and Monty remember the explosive bullets that Cosmo gave them, and tossed them on him and Badonna before telecarrying. She was destroyed with Cosmo, Galaxy Warriors, and then the Warrior Dome Ship is sent back to space.

Tynamon
Tynamon
General Tynamon was the manager of the famous fighter Brax. After his fighter was booked to fight in the latest season of Galaxy Warriors, he and Tynamon became guests on the Warrior Dome. He hid a secret, that he was a tiny monster inside a human sized robot body. His small size made him useful in Odius' final plan. He even switched bodies with Levi at some point. The Rangers form the Ninja Ultrazord and blast him, weakening him. He is destroyed by the Ninja Ultrazord Blast with him using his final moments to curse his bad luck.

Sledge
Sledge
Sledge returns from another dimension the Dino Charge dimension after the black hole takes him in. He changes his target from Energems to Super Ninja Steel. In exchange for the Ninja Super Steel meteor, Sledge had the Warrior Dome ship repaired for Madame Odius and Cosmo Royale. Afterwards, Sledge claims the Ninja Super Steel Meteor, but little did he know that Madame Odius had played one off on him, freeing one of his prisoners (Badonna), and having her extract most of the Ninja Super Steel from the Asteroid that Sledge claimed. Echoes of Evil Later, after Madame Odius, Cosmo Royale and Badonna's deaths, Sledge returns with Poisandra and Wrench and one of his new generals Snow Fright and they take over the Warrior Dome, with the surviving Basherbots During his final battle against the Ninja Steel Rangers and Koda, he is blown-up, alongside Poisandra and Wrench, by a bomb, sent by the Rangers, destroying him for good.

Poisnadra
Poisnadra
Poisandra returned with Sledge and Wrench. She tries to help Sledge to obtain the Ninja Stars, while also taking over the ruined Warrior Dome, after Odius' defeat. Sledge made her own show where she interviews the Ninja Steel Rangers. She is blown up, alongside Sledge and Wrench, by a bomb "gifted" by the Rangers, destroying her for good.