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Characters that appear in Bakugan. This page represents the antagonists and enemies of the Bakugan Battle Brawlers.

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Season 1: Battle Brawlers

    Naga 
Voiced by: Hideyuki Umezu (JP), John Stocker (EN)
A draconic-looking rogue Bakugan and a White One. He seeks to gain absolute power over all living things.
  • Big Bad: He is the main being driving the plotline of the first series, going after the two cores of Vestroia, throwing the world into chaos, and sending the Infinity Core to Earth.
  • Brains Evil, Brawn Good: As a white Bakugan, he is completely powerless, but he makes up for it by showing himself to be an incredibly capable schemer.
  • Cain and Abel: The Cain to Wyvern, another White Bakugan and his twin sister.
  • Don't Make Me Destroy You: He utters this to Wavern when he tries to convince her to give him the Infinity Core.
  • Draconic Abomination: He is a colossal white dragon with a body that looks like a skeleton and tattered wings. When Naga fully absorbed the Silent Core, he became much larger and had purple veins around his body, his wings were no longer attached to his hands. They resembled a cape and he had a sphere on his chest, in which the Silent Core is located. He has two large horns on his head and red eyes.
  • Evil Counterpart:
    • To Wavern, both are white Bakugan with no attributes, and both are hosts of Both halves of the Perfect Core with Wavern having the Infinity Core and Naga with the Silent Core, but while Wavern cares about other Bakugan and humans, Naga has no such qualities and only see’s them as despicable tools that he can corrupt.
    • To Drago, both are dragons-like Bakugan but thats where the similarities end, Drago seeks to protect the universe while Naga wants to rule it. also Drago has the Infinity Core thats made of positive energy while Naga has the Silent Core thats made of negative energy.
  • Evil Sounds Deep: He has a very deep voice.
  • Faux Affably Evil: Every time he speaks, his voice is rather calm, even if he is making it clear he is going to kill someone.
  • Final Boss: of season 1, alongside his partner Hal-G.
  • Flat Character: Doesn't get much onscreen growth, but that's partly because he's controlling things from behind the scenes the entire time.
  • Freudian Excuse: He sought to become the most powerful Bakugan in existence because he resented being born as a powerless White One.
  • Greater-Scope Villain: Thanks to his actions in the first season, the main antagonists of the other seasons are able to invade New Vestroia, where as before, it is implied the original Vestroia was shielded from other threats.
  • It's Personal: He does not like Drago, and it probably has to do with his relationship with Wavern.
  • It's All About Me: He tells Wavern that his actions are for the benefits of all White Bakugan, but it becomes very obvious he is really out for power just for himself.
  • Karmic Death: According to Word of God, he was sent to the Doom Dimension upon his defeat, the same place he'd arranged for a great many Bakugan to be sent to.
  • Not Quite Dead: According to Word of God, he was banished to the Doom Dimension... despite the fact he exploded. Fortunately, being sent to the Doom Dimension is actually a Karmic Death, since he attempted to send hundreds of Bakugan there.
  • Our Dragons Are Different: Naga starts out as a wyvern but, as the dark powers grown inside him, he becomes more of a humanoid Dracolich.
  • Our Wyverns Are Different: He starts out as a bipedal dragon with bat-like arm-wings, much like his sister Wavern.
  • Phlebotinum Overload: He can absorb energy. So Drago and the other Guardian Bakugan force feed it to him till he explodes.
  • Pragmatic Villainy: Why he spares Michael the first time he meets him. He realizes he can use the card Michael brings him by accident, and he decides to use him as his agent on Earth, instead of outright killing him.
  • Sealed Evil in a Can: He remains inside the Silent Core for much of the first season, before he breaks out towards the finale.
  • We Can Rule Together: He utters this to Wavern, who ignores it.

    Masquerade & Darkus Hydranoid 
https://static.tvtropes.org/pmwiki/pub/images/mmasquerade.png
And click here for Alpha Hydranoid
Masquerade is voiced by: Soichiro Hoshi (JP), Lyon Smith (EN)
A duo consisting of Masquerade, a brawler, and his guardian Bakugan, Darkus Hydranoid.
  • The Ace: Easily one of the best brawlers in all seasons when it comes to pure skill. During the first season, he was the No. 1 ranked Brawler in the world. Out of his twelve on-screen matches, he lost only three of them, only one of which was considered a fair loss.
  • Anime Hair: Masquerade's hair is styled up in gravity-defying spikes which are actually Alice's long hair made to stand up straight whenever he's controlling her.
  • Badass Longcoat: He wears a long white coat with a lot of buttons.
  • Cool Mask: Don't you deny it. Although its size may vary.
  • Dark Is Evil: Hydranoid is an evil and powerful Bakugan that looks like a monstrous dragon with a black, purple, and red color scheme. This contrasts Naga, who is an evil white dragon Bakugan.
  • Dark Is Not Evil: Hydranoid becomes this, after Masquerade's Heel–Face Turn.
  • The Dragon: To Naga.
  • Evil Mask: His mask is the source of his existence, allowing his personality to dominate Alice's.
  • Gender Bender: Masquerade is actually Alice's alter-ego, born through a combination of the Silent Core's negative energy and Michael Gehabich's dimensional transporter. While Alice is expressly female, the Masquerade personality itself is demonstrably masculine, resulting in this trope whenever he's in control.
  • The Heavy: Naga may be the Big Bad and Hal-G may be Naga's partner, but for much of the series it's Masquerade pushing the plan forward.
  • Heel–Face Turn: After losing to Dan, he agrees to help him one last time at Alice's request. After that, he vanishes.
  • Jekyll & Hyde: Masquerade is the Hyde to Alice's Jekyll.
  • Malevolent Masked Man: Masquerade, who wears a mask at all times until he finally takes it off to reveal that he's Alice.
  • Manipulative Bastard: He twists a lot of people around his finger in his quest to evolve his Hydranoid and defeat Naga's opposition.
  • Nice Job Fixing It, Villain: In his first appearance, he nearly sends Drago to the Doom Dimension, but he decides to spare him out of curiosity. This later causes a tsunami of problems for him and his subordinates later on in the season. He eventually does send Drago to the Doom Dimension, but by that point Dan and Drago are able to fight their way out of it.
  • Our Dragons Are Different: Hydranoid, a hydra.
  • Pet the Dog: He chooses to spare Drago at the end of his first appearance, admitting that he did so out of mercy, rather than pragmatism.
  • The Rival: To Dan, in Season 1.
  • Sixth Ranger: Well, he looks like your typical sixth ranger, being The Rival of The Hero who sees them as a Worthy Opponent and turns good after his defeat. Also Dan wants to convince him to become the proper sixth ranger of the team, discounting Joey who rarely fights and Alice who's a Non-ActionGirl. Kinda becomes the sixth ranger when he's revealed to be Alice, who becomes the team's sixth brawler, altough under her "real" identity rather than under the Masquerade one.
  • Sixth Ranger Traitor: Played With at first, then Subverted Trope. Alice is the Sixth Ranger and was The Mole who allowed Masquerade to know where he could find the brawlers due to being Masquerade. However, she did so without realising it up until Hal G explained how she got her Split Personality and confirmed that she was Masquerade. Shun adding that she was The Mole the whole time actually broke her and led to her running away out of shame. After going through some Character Development and returning to help the team, she appologised for her misdeeds and returned as a genuine Sixth Ranger.
  • Shoulders of Doom: He wears a metal plate under his jacket that covers his shoulders and upper chest. It's to hide Alice's breasts.
  • Split Personality: He's one for Alice, brought to life by Naga's surge of Negative energy.
  • Superpowered Evil Side: Masquerade is this for Alice.
  • Two Aliases, One Character: He and Alice are one and the same. Even Alice herself is shocked by this revelation.
  • Villainous Breakdown: The most famous one in the entire show. He took his first two on-screen losses in stride and in general next to nothing fazes him, but when Dan and Drago prove his and Hydranoid's equal during their final brawl, he completely loses it.
  • Walking Spoiler: It's nigh-impossible to talk about him in detail without disclosing his real identity.
  • Worf Had the Flu: His first two losses are attributed to being outnumbered two-on-one and facing off against the Infinity Core.
  • Worthy Opponent: He comes to see Dan as this, and ends up saving him when he's in trouble against Naga's henchmen.
  • You Are Better Than You Think You Are: Tells this to Alice before fading away. After all, she is him.
  • You Have Outlived Your Usefulness: He sent his first Guardian Bakugan, Reaper, to the Doom Dimension and replaced him with Hydranoid.

    Hal-G 
Voiced by: Masaharu Sato (JP), Ron Pardo (EN)

Naga's human partner and Masquerade's boss. He's later revealed to be Alice's brainwashed grandfather.


  • Big Bad Duumvirate: With Naga, due to being his brawler and the one advancing his plan.
  • Brainwashed and Crazy: He’s actually Alice’s grandfather.
  • Final Boss: The final villain of season 1, alongside Naga.
  • Heel–Face Turn: After Naga's defeat at the end of season 1. He actually helps the brawlers in season 2 and let them use his teleporter so they can go from Earth to Vestroia and vice versa.
  • Manipulative Bastard: Nowhere near as good as his master, but he deceives Alice into leaving the brawlers by claiming he has broken free of his brainwashing.

The Six Gatekeepers of Dark Vestroia

    General 
  • Ax-Crazy: All of them to varying degrees, minus the Haos-Subterra duo.
  • Elemental Powers: Being Bakugan hybrids, all of the Gatekeepers have two elemental powers for each of them, instead of one.
    • Both Rabeeder and her sister, Tricloid, have the Haos and Subterra elements.
    • Both Tayghen and her brother, Hairadee, have the Aquos and Ventus elements.
    • Both Druman and his brother, Centorrior, have the Pyrus and Darkus elements.
  • Gender-Equal Ensemble: The group consists of three males (Hairadee, Centorrior and Druman) and three females (Tayghen, Rabeeder and Tricloid)
  • Monster of the Week: All six of them.

    Aquos+Ventus Tayghen 
Voiced by: Ayumi Fujimura (JP), Alyson Court (EN)
Hairadee's sister.
  • Butter Face: A variation. Her top half is a somewhat attractive-looking humanoid girl with long sleeves while her bottom half is a hideous leviathan.

    Ventus+Aquos Hairadee 
Voiced by: Kiyotaka Furushima (JP), Carman Melville (English)
Tayghen's brother.

    Haos+Subterra Rabeeder 
Voiced by: Marina Inoue (JP), Stevie Vallance (English)
Tricloid's sister.
  • Affably Evil: She shows little to no hostility towards the Brawlers despite working for Naga, although she has her head on slightly straighter than what Tricloid does.
  • Berserk Button: She goes apeshit upon overhearing from Kato that the Brawlers "defeated" Tricloid, thinking that they killed her sister due to the butler not specifying what exactly went down. Fortunately, she calms down after finding out that wasn't the case.
  • Multi-Armed and Dangerous: Possesses two sets of arms on her top and bottom halves, and can be a formidable opponent under the right circumstances.
  • Not-So-Harmless Villain: Arguably even moreso than Tricloid, especially when she mistakenly believes that her sister was killed by the Brawlers.
  • Olympus Mons: Her design seems to take a few cues from figures related to Buddhism and Hinduism.
  • Sole Survivor: She and Tricloid end up being the only two hybrid Bakugan to survive the battle between the Brawlers and Naga.
  • Tiny-Headed Behemoth: Sort of. Her body consists of a roughly human-sized upper half on top of a large somewhat globular lower half.
  • Womanchild: She and Tricloid act more like overgrown children looking to play than fight.
  • What Happened to the Mouse?: She and Tricloid are never seen again or even mentioned after the events of the final battle.

    Subterra+Haos Tricloid 
Voiced by: Kinoko Yamada (JP) Caroly Larson (English)
Rabeeder's sister.
  • Affably Evil: Despite working for Naga, she shows almost no hostility towards the Brawlers.
  • Not-So-Harmless Villain: Despite her friendly demeanor, she turns out to be a formidable opponent when motivated enough.
  • Sole Survivor: She and Rabeeder end up being the only two hybrid Bakugan to survive the battle between the Brawlers and Naga.
  • Third Eye: Has three eyes, hence her name.
  • Womanchild: She and Rabeeder act more like overgrown children looking to play than fight.
  • What Happened to the Mouse?: She and Rabeeder are never seen again or even mentioned after the events of the final battle.

    Darkus+Pyrus Centorrior 
Voiced by: Takashi Kondo (JP), Scott McCord (English)
Druman's brother.

    Pyrus+Darkus Druman 
Voiced by: Yoshinori Sonobe (JP), Joseph Motiki (EN)
Centorrior's brother.
  • Blood Knight: He's more eager to fight than Centorrior. It plays into his affinity for the Pyrus element.
  • Big Brother Instinct: He really cares about Centorrior and gone berserk when Dan and Drago kill him.
  • Climax Boss: The last minion of Naga being killed before facing Naga himself.
  • False Reassurance: Claims to have saved Dan from a horde of Gargonoids, but then Centorrior points out that he only did so to kill them himself.
  • Noble Male, Roguish Male: The roguish male to Centorrior's noble male.
  • Our Dragons Are Different: He's a draconic Bakugan.
  • Playing with Fire: Has an affinity for the Pyrus element.
  • Red Oni, Blue Oni: The violent and impulsive Red Oni, to Centorrior's calm and calculating Blue Oni.
  • Villainous Breakdown: When Dan and Drago kill Centorrior, he goes berserk and stops toying with the protagonists. From that point he now wants the protagonists dead at any cost!

Season 2: New Vestroia

The Vexos

    General 

The main antagonists of New Vestroia.


  • The Ace: They are the strongest battlers on Vestal, and they definitely show it.
  • Aliens Are Bastards: As opposed to humanity which was largely and initially unaware that the Bakugan were sentient beings, the Vexos are completely aware and uncaring, considering they enslaved and experimented on them without remorse and later tried committing genocide against them. The rest of Vestal was kept in the dark about everything until the Resistance exposed the truth, leading to the Vexos being forced offworld and branded outlaws.
  • Artificial Human: The Mechanical Bakugan, created by Professor Clay using data collected from the Bakugan abducted from New Vestroia. While considerably powerful, they are seen by the Resistance as abominations of nature and by Gus as a sign that the Vexos have become lazy as brawlers and ignore the potential that living Bakugan possess.
  • Broken Pedestal: They become this to all of Vestal once their crimes are exposed by the Resistance.
  • Chronic Backstabbing Disorder: Some of them are guilty of sabotaging their own teammates for their own self-interest, most notably Spectra and Mylene.
  • Create Your Own Hero: Their cruel actions towards the Bakugan of New Vestroia prompted Mira to rebel and create the Resistance with the help of Ace and Baron.
  • Dwindling Party: Spectra and Gus defect after Spectra is made to take the fall for the destruction of the New Vestroia colonies, with Hydron and Zenoheld respectively taking over the now-vacant Subterra and Pyrus positions. The rest of the organization completely falls apart shortly after the announcement of the Alternative. Volt, Lync, Mylene, and Shadow are all respectively done in by Death Bombs, while Hydron, Zenoheld, and Clay are killed in the explosion of the Alternative.
  • Fantastic Racism: Towards the Bakugan of New Vestroia, treating them as lower lifeforms in spite of their intelligence. It only gets worse after the Vexos start making Mechanical Bakugan, at which point they see living ones as useless.
  • Final Solution: Their response to the Resistance destroying the colonies and freeing the Bakugan is the creation of The Bakugan Termination System (BT System for short), a device powered by the attribute energies designed to wipe out every last biological Bakugan on New Vestroia. It thankfully fails due to Drago taking it into space and absorbing the energies into himself.
  • Informed Attribute: Mira gives all of them an Info Dump in the second episode, and apart from Spectra being the best, almost none of her descriptions (ie. Gus being a Dirty Coward, Shadow Prove being a Sadist, Lync being a Determinator) apply when we meet them.
  • Not-So-Well-Intentioned Extremist: The second episode states that they conquered New Vestroia to deal with an overpopulation crisis, but it soon becomes clear their lack of regard for the Bakugan is born out of Fantastic Racism rather than survival.
  • Resignations Not Accepted: They adopt this philosophy once Zenoheld takes over, later enforced when the creation of the Alternative is announced. Any attempts to leave or betray the Vexos will end in the perpetrator/s being banished to another dimension, just ask Volt and Lync.
  • Teens Are Monsters: Their members barring Zenoheld and Professor Clay are all in their early to late teens, and all of them are largely complicit in the enslavement, torture, experimentation, and attempted genocide of Bakugan.
  • Undying Loyalty: The majority of them barring Spectra and Gus are this to Hydron and/or Zenoheld to various extents. Although it starts to waver among some of them when Zenoheld’s insanity worsens and the creation of the Alternative is announced.
  • Villain with Good Publicity: They were the celebrities of Vestal, putting on shows for the public while hiding their crimes behind closed doors. It all comes crashing down after the New Vestroia colonies are destroyed and Resistance exposes them, branding the Vexos as outlaws and forcing them to flee offworld.
  • We Have Become Complacent: What Gus thinks in regards to the Vexos throwing away their living Bakugan partners and replacing them with mechanical ones, accusing them of having become lazy as brawlers and overlooking the potential that living Bakugan possess.

     King Zenoheld and Pyrus Farbros 

King Zenoheld & Pyrus Farbros

Voiced by: Koji Ishii (JP), John Stocker (EN)
https://static.tvtropes.org/pmwiki/pub/images/chara_zenoheld.png
Click here for Farbros
Here for the Assail System
The King of Vestal, and the father of Hydron, his only son. His Bakugan is the mechanical Farbros, who is specifically engineered to be the pinnacle of Mechanical Bakugan.
  • Abusive Dad: He sees his son Hydron as nothing but a mere pawn for his own plans, using him as a tool against the Resistance.
  • Big Bad: In Season 2, especially in the later half once he decides to get personally involved in matters.
  • Dirty Coward: While his outward personality doesn't exude this, his battle tactics certainly do. Despite having what is considered to be the strongest Mechanical Bakugan, he always relies on the Assail System to power up Farbros. The one time he didn't, he used a specialized Trap Field in order to win. Considering he's never won a single battle in a fair manner, it stands to reason that despite his cruel exterior, he is this. It comes full circle when in his final episode, just as Hydron captures him aboard The Alternative, he begs him for mercy, despite how horrendously he's treated his son the entire series.
  • Dub Name Change: In the Japanese original, he is called King Zenoheld IV.
  • Evil Old Folks: While his exact age is not known, his greyed hair and beard suggests that he's higher up in age.
  • Fat Bastard: While not obvious from his page image, when in battle he wears a red and black jumpsuit that shows that he's rather rotund, and he's definitely one of the most evil characters in the show by far.
  • Four Is Death: Known as King Zenoheld IV in the Japanese dub.
  • Hate Sink: One of the most, if not the worst villains in the entire show, only being beaten by Barodius/Mag Mel, and Wiseman/Coredegon/Mechtavius Destroyer. For starters, his main plots involve wanting to enslave the Bakugan, to wanting to exterminate the Bakugan, to wanting to wipe out entire planets. And that's not even getting into how he treats his subordinates, and especially his own son.
  • Hoist by His Own Petard: Had he not treated his son Hydron so badly throughout the season, he would have never rebelled against him and trapped him on The Alternative as it self destructed.
  • Karmic Death: The Alternative, a starship that was designed to blow up entire planets, blows up with him stuck on it. To twist the knife even further, his own son, who he's abused to entire season, is the one who traps him on it while he begs for mercy.
  • Meaningful Name: The "Zeno" part of his name could be seen as alternate spelling for "Xeno", as in Xenophobic, seeing as he at first enslaved the Bakugan, then tried to exterminate them all. It is also possible that "Xeno" is derived from a Greek work meaning alien, or foreign and the "Held" part, with connotation of ownership, Zenoheld's name technically means "ruler of the cosmos/foreign lands", fitting of his status as the King of Vestal and conquerer of New Vestroia.
  • Omnicidal Maniac: Gets so fed up with getting his ass kicked multiple times by the heroes that he ends up trying to destroy the whole universe.
  • Our Dragons Are Different: His Bakugan, Farbros, is a gigantic mechanical dragon that vaguely resembles building blocks.
  • Playing with Fire: His Bakugan Farbros is of the Pyrus attribute, although strangely, some of its abilites involve it shooting out ice beams, gusts of wind, and even torrents of water. It's possible that Farbros was designed for multiple attribute coverage as part of its status as the ulimate Mechanical Bakugan.
  • Red and Black and Evil All Over: His specialized battle suit is predominantly red with black accents, and so is his Bakugan Farbros, and he's one of the most evil characters in the show.
  • Serial Escalation: As stated in Villainous Breakdown below, his plans keep on getting more and more severe as the series goes on. He goes from enslaving the Bakugan to trying to exterminate them, to trying to exterminate the universe and possibly beyond that.
  • Stationary Boss: Farbros doesn't move around during battle. Zenoheld usually just has it counterattack with its many weapons or take attacks and then recover with the FARBAS system.
  • Tricked-Out Gloves: A variant, while everyone in the New Vestroia series uses a specialzed gauntlet in order to battle, Zenoheld uses an even more advanced version of one that actually shoots his Gate Cards as well as his Bakugan, not unlike the Bakugan Launchers from the first season.
  • Unskilled, but Strong: He is not a particularly unskilled brawler, but anytime his opponent shows the ability to actually give him serious pushback he just decides to use the Assail System, a special set of equipment that boosts his Farbros' G-power by 4200. For reference, even in the final seasons whatever new gimmicks are introduced don't boost G-powers by more than a few hundred.
  • Villains Want Mercy: When trapped aboard The Alternative by his son Hydron, he futiley begs him to stop, despite how much he abused him.
  • Villainous Breakdown: He doesn't take failure well. Each time his forces are defeated his motivations get more and more overboard. He goes from trying to conquer the Bakugan to trying to perform genocide on them to finally trying to destroy the whole freaking universe! Yeah, he's still pretty composed the whole time, but his motives aren't.
  • Villain Has a Point: At one point during his brawl with Hydron he tells him that he shouldn't care what he thinks of him and considering how he treats him it's hard to disagree.

    Professor Clay Fermin 
Voiced by: Kenichiro Matsuda (JP), Scott McCord (EN)
https://static.tvtropes.org/pmwiki/pub/images/chara_clay_fermin.png
  • Mad Scientist: To give an idea of his technological genius, his list of inventions include mechanical versions of living Bakugan, the Bakugan Termination System, a device designed to exterminate all Bakugan, and the Alternative Weapon System, a massive battleship powerful enough to annihilate entire planets and capable of interdimensional travel if Zenoheld's words are to be believed. While it has not been confirmed, it is likely he is also responsible, at least in part, for the creation of the Gauntlets required to battle in New Vestroia and dimension controllers as well.
  • Sanity Slippage: Was more than willing to fire the Alternative's main gun on his own son, all while laughing like a madman. Clearly the Vexos' constant defeats and his desire for perfection and knowledge did a number on his sanity.
  • Undying Loyalty: To Zenoheld.

    Hydron and Subterra Dryoid 

Prince Hydron & Subterra Dryoid

Voiced by: Soichiro Hoshi (JP), Lyon Smith (EN)
https://static.tvtropes.org/pmwiki/pub/images/chara_hydron.png
Click here for Dryoid

The prince of Vestal and Zenoheld's only son. His Bakugan is the mechanical Dryoid.


  • 11th-Hour Ranger: of season 2, alongside Gus Grav. Hydron joins the Brawlers after defecting from the Vexos and breaking out of his father's jail.
  • Badass Longcoat: In New Vestroia Arc 2, he wears an awesome looking long vest with fur trim all around the collar.
  • Beware the Silly Ones: At first glance, Hydron is a Spoiled Brat and a General Failure. This is Lampshaded by a lot of characters in universe, including Hydron's father. However, Hydron is one of the strongest villains of the show and is very competent at times. Also he isn't a complete fool.
  • Blade Below the Shoulder: Dryoid's Ray Blade ability gives it these.
  • The Dragon: To his father King Zenoheld, when he and his father become new members of the Vexos.
  • Dragon-in-Chief: He is the one advancing the plot and the most dangerous member of the Vexos in Part 2. While is father is the strongest member of the Vexos, he needs to rely on technology and/or to cheat to win. That is not the case with Hydron, who might be theorically stronger than his father during a fair fight.
  • Dishing Out Dirt: Downplayed While Hydron uses the Subterra attribute, Dryoid, being a Mechanical Bakugan and not an organic one, doesn't really have any moves that involve manipulating the ground or earth. Instead, it mainly uses moves that involve various blasters and cannons built into it's body, or a powerful energy sword that has various fusion abilities to power it up.
  • Fallen Princess: Male version; he loses his title and privileges after his father ceases to be the King of Vestal. However he doesn't seem to mind it that much since in he corrects Baron that he's no longer "Prince Hydron" due to the Ressistance. This is rather noticeable compared to his father who still calls himself King.
  • The Heavy: Prince Hydron is the main villain during the first half of New Vestroia, being the one invading Vestroia and hunting down Drago so he could have all of the six Guardian Bakugans the Brawlers haved in season 1. That said, Spectra is his Dragon-in-Chief. During part 2, Hydron himself is the Dragon-in-Chief of his father and the one advancing the plot.
  • Redemption Equals Death: Ends up dying in the Alternative's explosion to prevent his father from escaping.
  • Royal Brat: He's spoiled rotten, and sees Bakugan as things to collect.
  • Signature Move: The Murasame Blade, a Laser Blade that changes color depending on what other abilities Hydron uses.
  • Sore Loser: Does NOT take losing well, evident by his reaction after he was defeated by Volt. To be fair, Volt technically did cheat.
  • Taking You with Me: He lets himself get incinerated in the explosion of the Alternative, but not without apprehending Zenoheld and subjecting him to the same fate.
  • Took a Level in Badass: When we first see him, he is a spoiled rotten prince that waltzes around in a Not So Badass Cape, thinking he's tough stuff. When New Vestroia Arc 2 begins, he seems a lot cooler, calm and collected, plus he has the most awesome Mechanical Bakugan in the series.
  • "Well Done, Son" Guy: Desperately wants Zenoheld's approval and love. Lync and even Zenoheld himself mocks him for being this. Eventually he comes to his senses and sacrifices himself to prevent Zenoheld from escaping his battleship.

    Spectra Phantom & Pyrus/Darkus Helios 

Spectra Phantom / Keith Fermin & Pyrus/Darkus Helios

Spectra voiced by: Yasuhiro Mamiya (JP), Dan Petronijevic (EN)
Helios voiced by: Takashi Matsuyama (JP), Robert Tinkler (EN, New Vestroia), Roger L. Jackson (EN, Defenders of the Core), Andrew Jackson (EN, Mechtanium Surge)
https://static.tvtropes.org/pmwiki/pub/images/spectraphantom_nv.png
  • Badass Longcoat: Wears a very long and very cool looking coat.
  • Big Damn Heroes: In Mechtanium Surge to save the group twice in an epic fashion.
  • Casting a Shadow: In Mechtanium Surge, he comes back as a Darkus user.
  • The Corrupter: He briefly took control of Drago and corrupted him.
  • Dark Is Not Evil: In the first arc of Mechtanium Surge, he becomes a Darkus brawler, but since his redemption in New Vestroia, he finally joins the Dan and his company to stop Mag Mel.
  • Discard and Draw: Helios discards his Pyrus abilities to become a far more powerful Darkus Bakugan in Mechatanium Surge.
  • The Dragon: To the Royal Family in the first half of season 2 with him being the leader of the Vexos.
  • Dragon-in-Chief: The guy is the de facto lead villain during the first half of New Vestroia due to being far more competent than the royal family. Averted during the second half of the season, where he's a Wild Card Commuting on a Bus at first. Then he regains a bigger role but acts as the Sixth Ranger of the heroes. Beside, Hydron turns out to be more powerful than he looks like.
  • Dragon with an Agenda: Though he ostensibly served Prince Hydron loyally for most of the first arc, he clearly had his own plans. This is revealed fully in episode 21 where he declares his intention to overthrow the royal family and become the new ruler of Vestal. In his own words, he wants power for power's sake. After Hydron and the Vexos betray him, he leaves them and strikes out on his own with Gus at his side.
  • The Heavy: He and Hydron are this during the first half of New Vestroia as the one leading the attacks against the Brawlers. During part 2 he's also a more direct threat than Zenoheld.
  • Heel–Face Turn: He joins the Brawlers at the end of New Vestroia and is Easily Forgiven. He also joins them as a good guy in Mechtanium Surge.
  • It's Personal: Initially has no qualms with Zenoheld’s BT System, only helping the Brawlers to get there and stop it and trying to convince the Vexos to ignore them purely because it would be inconvenient for his plan to create the Ultimate Bakugan. But after Gus seemingly dies, Spectra steps up to face Zenoheld personally and allows the Brawlers to save the Bakugan in New Vestroia.
  • Karma Houdini: Rid a couple of Bakugan of their souls? Who cares, you’re still Mira’s brother and a good guy! That said, the guy almost goes through an Heroic Sacrifice to save everyone in season 4, so it's retroactively a Justified Trope.
  • A Lighter Shade of Black: Spectra might be evil (at first), but Zenoheld is far worse than him.
  • Our Dragons Are Different: Helios is not your traditional dragonoid.
  • Playing with Fire: His attribute is Pyrus in New Vestroia.
  • The Scapegoat: He's made by Hydron and Mylene to be the reason that the New Vestroia colonies fell. Spectra is less than pleased with their decision.
  • Sixth Ranger: In New Vestroia. Becomes this in a very unexpected way in Mechtanium Surge.
  • Suspiciously Similar Substitute: Like Masquerade before him, Spectra is a blond, masked villain with a secret identity and dragon Bakugan partner who serves as The Heavy of the villain faction and pulls a Heel–Face Turn.
  • What the Hell, Hero?: Gives one to Dan in Mechtanium Surge.
    Spectra: You've changed, my friend. You're not the same guy who brought me out of my darkness. And the Battle Brawlers seem to be fractured. How very sad. (leaves)
  • You Shall Not Pass!: In Mechtanium Surge, he and Helios perform this to give the Brawlers time to escape from the impending destruction of Bakugan Interspace. He survives and makes a totally badass comeback next episode though.

    Gus Grav & Subterra Vulcan 
Gus voiced by: Yuki Kaji (JP), Chris McCawley (EN)
Vulcan voiced by: Eiichiro Tokumoto (JP), Ron Pardo (EN), Roger L. Jackson (EN, Defenders of the Core)
https://static.tvtropes.org/pmwiki/pub/images/gusgrav.png

  • Ambiguously Gay: Gus is very flamboyant-looking and very loyal to Spectra.
  • The Dragon: Of Spectra.
  • Dogged Nice Guy: Towards Spectra.
  • Evilutionary Biologist: After taking Elico and Brontes in when they were disposed of by Mylene, Gus evolves them and Vulcan using the power of the Forbidden Ability Cards. Volt is none too pleased with him for it, accusing Gus of having turned Brontes into a monster.
  • Expy: He's the Gyunei Gus to Spectra's Char Aznable. Hell, his name is practically identical to Gyunei's planned name of Graves Gus (except for the reversed naming order, that is, and a slightly-clipped surname).
  • Meaningful Name: Grav, as in Gravity. He’s a Subterra brawler.
  • More than Mind Control: Seems like this in relations to Spectra.
  • Taking the Bullet: Hexados is vaporized when he willingly comes out on his own to shield an incapacitated Vulcan from a fatal blast from Farbros.
  • Not Quite Dead: He seems to have been killed by Zenoheld at the end of their fight. In truth, he survived and was arrested for turning against the Big Bad. He and Hydron later break out of jail and join the heroes as the 11th-Hour Ranger(s).
  • Undying Loyalty: To Spectra. And just as his loyalty to Spectra knows no bounds, so does Vulcan's loyalty to Gus. His Trap Bakugan Hexados shows this too, seeing as how he willingly came out on his own to shield Vulcan and Gus from a fatal blast from Farbros at the cost of his own life. Elico eventually does too, considering he was willing to sacrifice his own life to protect Gus and Vulcan like Hexados did.
  • You Have Outlived Your Usefulness: The only reason Gus rescued and evolved Brontes after the latter was thown away by Mylene was to use him as a bargaining chip to try and persuade Volt into leaving the Vexos. When it fails, the Haos Bakugan is thrown back to the surface of New Vestroia.

    Volt Luster, Haos Brontes & Haos Boriates 
Volt voiced by: Tomoaki Maeno (JP), Carter Hayden (EN)
Brontes voiced by: Yukitoshi Tokumoto (JP), Robert Tinkler (EN), Scott Reyns (EN, Defenders of the Core)
https://static.tvtropes.org/pmwiki/pub/images/voltluster.png

  • The Big Guy: Of the Vexos.
  • Even Evil Has Standards:
    • He prefers to defeat an enemy in battle instead of leaving them to die in the wilderness, evidenced by him saving Marucho from drowning in quicksand.
    • He also protests with how Mylene callously throws away the Vexos’ living Bakugan partners, including Elico and Brontes, leading to Volt trying and failing to get his partner back from Gus.
    • He’s absolutely livid at Gus for taking in and artificially evolving Brontes, calling Gus an animal for performing such heinous experiments on his former partner.
    • Finally, he chooses to defect when Zenoheld reveals his plan to destroy the universe using the Alternative, wanting no part of it as it will result in the deaths of countless innocents. Unfortunately for Volt, his boss doesn’t accept resignations.
  • Fiery Red Head: A man with short red hair and a hot temper to match.
  • Heel–Face Turn: See Never Hurt an Innocent.
  • Make an Example of Them: His banishment to another dimension is used by Zenoheld as a warning to anyone else who would try to defy him in any way, not that it stops Lync from doing so anyway.
  • Multi-Armed and Dangerous: Brontes ends up gaining an extra pair of arms after evolving.
  • Never Hurt an Innocent: The main reason why he turns against Zenoheld.
  • No-Sell: Once the Custom Battle Ability is activated, none of Dryoid's attacks can put a dent in Boriates's armor.
  • Pet the Dog: Volt and Brontes, followed by Shoot the Shaggy Dog from Gus.
  • Redemption Equals Death: He was never that bad to begin with, but still.
  • Replacement Goldfish: The mechanical Boriates becomes his replacement guardian Bakugan after Mylene throws Brontes away on him. While Volt reluctantly accepts it, he still seeks to get his former partner back.
  • Screw This, I'm Outta Here: After his concerns regarding the Alternative's completion resulting in the deaths of countless innocents is ignored, Volt decides to jump ship despite Mylene's warning that it won't end well for him. She's proven right when he ends up banished to another dimension by Hydron under Zenoheld's orders.
  • Taking You with Me: Volt attempts to take Hydron with him while being sucked in by a Death Bomb. It doesn't work.
  • Vitriolic Best Buds: With both Lync, and his first guardian Bakugan Brontes.
  • Token Good Teammate: The only member of the Vexos with any honor, and the only one who cared about their biological guardian Bakugan, Brontes. In fact, the two only separated because Mylene threw Brontes and Elico away against their will.

    Lync Volan, Ventus Altair & Ventus Aluze 
Voiced by: Matsuri Mizuguchi (JP), Robert Tinkler (EN)
https://static.tvtropes.org/pmwiki/pub/images/lyncvolan.png

  • The Baby of the Bunch: He’s the youngest member of the Vexos, being 14 years old.
  • Because You Were Nice to Me: Due to Alice giving him food and shelter, he ends up leaving the Vexos and steals a copy of the Alternative’s data upon realizing that she would be killed if it was completed.
  • Crippling Overspecialization: The biggest flaws Altair & Aluze have that they are both created to be the greatest threat in the air which means they have many long-distance attacks and are very fast with their lightweight armor, but are easily defeated once the opponent managed to either get close or force it to the ground.
  • Composite Character: Appearance and abilities-wise, Aluze combines both Altair and Wired into one Mechanical Bakugan.
  • Defecting for Love: He decides to help the Brawlers out of love for Alice.
  • Flawed Prototype: Altair is the first Mechanical Bakugan and is shown to have many flaws, such as quick energy draining in its debut and Crippling Overspecialization noted above. These problems would be rectified in its successor Aluze and the other Mechanical Bakugan once the technology to create them is perfected.
  • Heel–Face Turn: Upon hearing that the Alternative weapon will destroy both Vestal and Earth, Lync copies the blueprint data of the Alternative Weapon System to give it to Alice.
  • Heroic Sacrifice: Risks his life to try and get the data for the Alternative to Alice, even when he knew that doing so would likely result in him ending up like Volt.
  • Informed Ability: Despite being one of Vestal’s top brawlers, he loses most of his onscreen battles.
  • Morality Pet: Downplayed. He’s more than willing to manipulate Alice if it furthers his own goals, but he can’t stand the thought of her being hurt or killed.
  • Redemption Equals Death: He ends up defeated by Hydron and subjected to the same fate as Volt, but not before leaving the data for Alice to find.
  • Replacement Goldfish: Starts using Aluze as his Bakugan partner after Altair is destroyed by Nemus.
  • Superior Successor: Aluze is basically a stronger and more refined version of Altair.
  • Vitriolic Best Buds: With Volt Luster.

    Mylene Farrow, Aquos Elico & Aquos Macubass 
Mylene voiced by: Fuko Saito (JP), Bailey Stocker (EN)
Elico voiced by: Dan Petronijevic (EN), Darren Jennings (EN, Defenders of the Core)
https://static.tvtropes.org/pmwiki/pub/images/mylenefarrow.png

  • Alas, Poor Villain: Downplayed. While she had it coming, Mira and Kieth are left stunned as they witness her and Shadow getting sucked into their own Death Bomb portal for all eternity.
  • Asshole Victim: She and Shadow end up getting sucked into their own Death Bomb portal for all eternity trying to kill Kieth and Mira. An unpleasant fate, but considering she personally committed and was involved in countless atrocities against the Bakugan for the sake of power without remorse, it's hard to feel too sorry for her.
  • Attack Drone: Macubass' ABSIDS ability.
  • Aw, Look! They Really Do Love Each Other: Some fans believe the relationship of her and Shadow Prove is more than friends. Even in episode 37, it's shown they are undercover as a couple and share the same T-shirt.
  • The Baroness: Although her loyalty is to Zenoheld, she's not as evil as him but she's still a competitive brawler.
  • Beauty Is Bad: She has attractive looks, combined with her cold and ruthless personality.
  • Even Evil Has Standards: She is a cruel person, but even she acknowledged that Zenoheld is becoming more crazy and dangerous, especially with his plans to destroy Vestal and Earth. However, she goes along with it, knowing Zenoheld will execute her if she objects.
  • Expy:
    • *Cough* Her Macubass. If you are Gundam fans, you will be familiar with it.
    • She herself is an expy of Mouar Pharaoh, sharing a similar overall look and character arc of "falling in love with the constant loser" (in Mouar's case, Jerid, in Mylene's, Shadow). Even the surname is pretty much the same.
  • Heroic Sacrifice: Elico.
  • Mirror Character: Has more than a few parallels with Spectra, which Mylene herself even acknowledges. Both of them were initially being power-hungry antagonistic brawlers willing to walk over almost anyone and everyone for their own gain. However, while Spectra eventually reevaluated his ways and buried the hatchet with Dan and the Resistance, Mylene doubles down on hers (to the point where she willingly threw away and replaced her own Bakugan partner with a mechanical one despite the former's competency and loyalty) and refuses to let go of her resentment towards Spectra, ultimately leading to her demise.
  • Oh, Crap!: After she realizes that her Death Bomb is not working in Bakugan Interspace, which causes her and Shadow's Karmic Death.
  • Redemption Rejection: Keith offers her to join his side, but she rejects it and chooses to die than to face dishonor after her defeat and tries to kill him and Mira.
  • Replacement Goldfish: She willingly and literally throws Elico away in favor of the mechanical Macubass despite the former's loyalty and competence.
  • Shadow Archetype: What she basically devolves into by the end of the season, representing what Spectra could’ve been like if he hadn’t changed his ways.
  • The Starscream: She's not above using underhanded moves to try and usurp Spectra as leader of the Vexos and Vestal's top brawler, such as her being willing to leave him stranded on Earth and coming up with the idea to blame him for the destruction of the New Vestroia colonies.
  • The Smurfette Principle: The only female member of Vexos.
  • Taking the Bullet: Elico takes a fatal blast from Farbros meant for Vulcan, sacrificing his own life in the process.
  • You Have Outlived Your Usefulness: She does this to any Bakugan she deems weak, throwing them away like trash. She even does it to Elico (and Brontes, much to Volt's dismay) after the technology to create Mechanical Bakugan is perfected, declaring living Bakugan to have become useless.

    Shadow Prove, Darkus Hades & Darkus MAC Spider 
Voiced by: Daisuke Endo (JP), Darren Frost (EN)
https://static.tvtropes.org/pmwiki/pub/images/shadowprove.png

  • Alas, Poor Villain: Downplayed. While he had it coming, Mira and Kieth are left stunned as they witness him and Mylene getting sucked into their own Death Bomb portal for all eternity.
  • Asshole Victim: He and Mylene end up getting sucked into their own Death Bomb portal for all eternity trying to kill Keith and Mira. An unpleasant fate, but considering he personally committed and was involved in countless atrocities against the Bakugan for the sake of power without remorse, it’s hard to feel too sorry for him.
  • Aw, Look! They Really Do Love Each Other: Some fans believe the relationship of him and Mylene is more than friends. Even in episode 37, it's shown they are undercover as a couple and share same T-shirt.
  • Ax-Crazy: Shadow's facial expressions and overall obsession with defeating Brawlers are simply psychotic.
  • Blood Knight: Shadow wants his targets defeated at all costs and is also a very sore loser.
  • Everyone Has Standards: Shadow may have been insane, but after Zenoheld announces the Alternative Weapon System, he say-whispers "cuckoo" to Mylene, which implies that he doesn't like the idea of destroying Vestal and Earth as the rest of the Vexos.
  • Expy: Roughly half-and-half expy of Jerid Messa and Yazan Gable: he gets Jerid's relationship with the Mouar expy (Mylene) but otherwise takes his Blood Knight personallity after Yazan.
  • Evil Knockoff: Hades is a Mechanical Bakugan created in the likeness of Hydranoid, with most of its abilities being based off his. Hydranoid is none too pleased when he hears about it, enough that he wants to and becomes the one to personally destroy his robotic copy when they eventually face off against each other.
  • Full-Name Basis: Is usually referred to by his full name.
  • Giant Spider: His second Mechanical Bakugan, MAC Spider.
  • Laughing Mad: Always does this, complete with showing his tongue.
  • Meaningful Name: He wasn't named Shadow for nothing.
  • Mirror Character: He's somewhat of one to Gus, as both tend to affiliate themselves with and show considerable loyalty towards another member of the Vexos (Spectra for Gus, Mylene for Shadow).
  • Our Dragons Are Different: Hades, a mechanical copy of Hydranoid.
  • Replacement Goldfish: Starts using MAC Spider as his Bakugan partner after Hades is destroyed by Hydranoid.
  • Troll: Has his moments, the most notable being when he dresses up Hades to look like Hydranoid in its debut episode to mess with Shun and Ingram.
  • Undying Loyalty: To Mylene, enough that he's willing to go with her when she's about to be sucked into a Death Bomb portal after she fails to kill both Keith and Mira.
  • White Hair, Black Heart: Has white hair, and is an insane guy.
  • You Are Worth Hell: After Mylene is sucked into another dimension, he immediately jumps in to be with her.

Season 3: Gundalian Invaders

The Twelve Orders

    General 
The main antagonists of Gundalian Invaders.
  • A Form You Are Comfortable With: Like all Gundalians, they are capable of disguising themselves in human forms, although their ears are pointy.
  • Aliens Are Bastards: Most of the Major Twelves Orders have waged a war against Neathians, and their actions are horrible.
  • Evil Will Fail: Their jealousy, mistrust, and backstabbing of each other was the main contribution to their downfall. To wit, Gil murdered Kazarina out of blind jealousy, to which Barodius killed him in retaliation (along with Airzel), followed by Barodius ruthlessly taking out Stoica just because he was in the way while attacking Dragonoid Colosssus.
  • It's All About Me: Most of them don't give a crap about anyone, but themselves.
  • Royals Who Actually Do Something: While some of them aren't actually Royal, the Major Twelve Orders leading the war against Neathians, and they are an enemy you won't want to have.
  • You Have Failed Me: Most of the Major Twelve Orders don't take their subordinates failures well, and they're willing to dispose of them, which Kazarina being the worse example.

    Barodius and Darkus Dharak 
Barodius voiced by: Ken Narita (JP), Shawn Meunier (EN)
Dharak voiced by: Takaya Kuroda (JP), Tony Rosato (EN)
https://static.tvtropes.org/pmwiki/pub/images/barodiusgi_5.png
The tyrannical emperor of the Gundalians in the third season and the leader of the Twelve Orders.
  • 0% Approval Rating: Everyone in Gundalia (except Gill, Kazarina, Airzel and Stoica) fear and despise him for being an utterly heartless tyrant. Even the Gundalian Soldiers can't stand Barodius as they all serve him out of fear and try so hard to stay on his good side and not question his orders.
  • Ambition Is Evil: Barodius believes that he's worthy of the Sacred Orb's powers because of his ambition to conquer the universe. He outright tells Dan that he doesn't believe he's worthy of that power because Dan has "no vision, no grand master plan", and that he's only focused on being the good guy.
  • Arch-Enemy: He is this towards Dan Kuso.
  • Bad Boss: Barodius treats his subordinates like expendable pawns and doesn't give a damn about them. He will also sacrifice his own subjects to destroy both enemies and traitors. He also forces his people to live underground. All this would lead Nurzak and Ren Krawler to switch sides after seeing what a horrible, uncaring tyrant he really is.
  • Big Bad: Of the third season, as he declared war on the Neathians and is the leader of the Twelve Orders. Also in the fourth season, as he was revealed to be Mag Mel's true identity.
  • Blue Blood: He was a member of a family that ruled Gundalia for generations.
  • The Chosen One. Like Dan, he was destined to be Dharak’s partner, automatically making him this.
  • Dark Is Evil: He's a Darkus Brawler.
  • The Emperor: He is the tyrannical ruler of the Gundalian Empire. Unlike his father he is a brutal tyrant who only desires power above all else and will go to any lengths to get it.
  • Evil Counterpart: To Dan in general, as both of their Bakugans have Ultimate Warrior Gene. While Dan treats his teammates like friends and family, Barodius treats his like disposable pawns and cares nothing about them.
  • Evil Overlord: He rules Gundalia with an iron fist.
  • Evil Sounds Deep: Has this for both versions, with Ken Narita voicing him in Japanese and Shawn Meunier doing his English voice.
  • Foil:
    • To Spectra Phantom. Both Barodius and Spectra had ambitions of conquest through having their own partner Bakugan become the most powerful Bakugan of all. However, Spectra genuinely cared about those under his command, and had a spark of goodness in him, as shown when he later pulled a Heel–Face Turn. Barodius, meanwhile, cares for no one but himself.
    • To Zenoheld. They are both rulers of their respective planets, who cared very little subordinates and don't give a damn about them. But while Zenoheld would use cheap tactics or outright cheat to win, as well as being a Dirty Coward in the end, Barodius doesn't rely on such tactics to win, and shows genuine bravery and resolve.
  • It's All About Me: He is extremely egotistical and narcissistic as he cares about no one but himself and shows no respect and mercy towards his subjects; escpecially his most loyal supporters.
  • Lack of Empathy: Barodius shows no love or care towards his late father and cruelly mocks him right in front of Nurzak and destroys his father's portrait just to spite both him and Nurzak. He even shows no remorse for killing his most loyal allies Gill, Airzel and Stoica in cold blood and this shows just how heartless and uncaring Barodius really is.
  • Unfriendly Fire: Kills three of his own men. In Gill and Airzel's case, it was because of their active treason. In Stoica's, it was just because the poor sap happened to get in his way.
  • Ungrateful Bastard: He betrays and kills Gill, Airzel and Stoica after years of loyal service and support towards him.
  • Villain Respect: While he hated his father, seeing him as a superstitious and senile old fool, he outright says that his father was no coward. He explains that this is why he paid so much attention to Ren and Linehalt, believing that his father locked up Linehalt and his fellow "Dark Bakugan" for a reason, that reason being their fabled "Forbidden Powers", which Barodius wanted to weaponize for himself, hence why he took Ren under his wing, in the hopes that Ren would lead Linehalt to unleash those powers.
  • White Hair, Black Heart: This guy has white hair, but he is pure evil.

    Kazarina and Haos Lumagrowl 
Kazarina voiced by: Kimiko Saito (JP), Linda Ballantyne (EN)
Lumagrowl voiced by: Soichiro Hoshi (JP), Dan Petronijevic (EN)
https://static.tvtropes.org/pmwiki/pub/images/kazarina_gi_2.png
A Gundalian Mad Scientist who is responsible for hypnotizing the young brawlers from Bakugan Interspace and her own minions for battle against the Neathian Castle Knights.
  • Alas, Poor Villain: She will never be sympathetic, but her death interestingly averted her from being an Asshole Victim because Lumagrowl was genuinely saddened over the death of his partner and chose to retreat from their last battle against Fabia and Aranaut, to the extent that Fabia can also feel Lumagrowl's sadness.
  • Antagonist in Mourning: Lumagrowl, after seeing that Kazarina was dead and being beaten by Aranaut, leaves on his own in shame. He even gives a sad, mourning howl as Fabia and Aranaut see him leave.
  • The Baroness: Not only is she one of the most competent antagonists in Season 3, it also looks like Kazarina has ambitions to be "queen" for Barodius.
  • The Dragon: The Emperor seemed awfully fond of her, even stating her name after executing Gill, as he prepares to attack the Brawlers.
    Barodius: Destroy them. For Kazarina!
  • Dramatic Irony: She is responsible for killing Aranaut's first partner who was none other than Fabia's fiance. After her death, Lumagrowl has the same fate with Aranaut. To add more Irony, instead of feeling satisfaction with her death, Fabia can't help but feel sorry for Lumagrowl for losing his partner.
  • Even Evil Has Standards: Implied. After the children taken from Bakugan Interspace prove to be ineffective as soldiers, she has them returned to Earth, free of her control. Even though she could've easily had them all killed, she simply chose to spare them. Considering how this action presented no kind of benefit to her, and that she still went with it is...interesting, to say the least. Then again, she was perfectly willing to kill Dan, who wasn't much older than those kids, so it could simply be Kazarina's arrogance showing or just her entertaining herself by messing with Jake's head.
  • Graceful Loser: When Lumagrowl is defeated by Aranaut after seeing that Kazarina was killed, Lumagrowl simply acknowledges his defeat and walks away. Even when Aranaut pointed out that he only won because Lumagrowl was distracted by seeing Kazarina's corpse in Nurzak's hands just as he was about to kill Aranaut, Lumagrowl simply says that was part of his fate, and leaves.
  • Hated by All: None of the other Gundalians like or respect her. They call her names and treat her with barely-concealed fear or contempt. The only one who likes her is Barodius, fittingly, because his is the only opinion she cares about.
  • The Heavy: Kazarina, out of all the Twelve Orders does the most in contributing to the Gundalian war effort and Barodius' ambitions. She's the one who brainwashed the young brawlers from Bakugan Interspace and Ren's friends to serve as Child Soldiers, lures Nurzak into a trap when he attempts to betray Emperor Barodius, upgrades Dharak's Colossus form, brainwashes Jake, who later gets used to capture Dan and Drago, and finally, she steals Drago's DNA and uses it to evolve Dharak into Phantom Dharak.
  • Laser Blade: Briefly wields a rapier-shaped one against Nurzak. Then she loses it, and Gill finds it and uses it to kill her.
  • Light Is Not Good: She's the Haos brawler of the Twelve Orders. She's also sadistic and arrogant.
  • Hypnotic Eyes: She has the ability to hypnotize humans, Gundalians and Bakugan.
  • Mad Scientist: For the Twelve Orders. She actually hates being called this, though.
  • The Mole: Pretended to side with Nurzak in his planned coup, but turns him in to the Emperor.
  • Slipknot Ponytail: Her ponytail comes loose after Gill strikes her down.
  • Sole Survivor: At the end of the series, Lumagrowl is the only survivor of the Major Twelve Orders to survive the war, and that is without changing sides.
  • Witch with a Capital "B": Often referred to as such by her fellow Twelve Orders members. She hates being called that, too.

    Gill and Pyrus Krakix 
Gill voiced by: Hikaru Midorikawa (JP), Scott Gorman (EN)
Krakix voiced by: Unknown (JP), Ron Pardo (EN)
https://static.tvtropes.org/pmwiki/pub/images/gil_34.png
Barodius' right-hand man and Second-in-command of the Twelve Order.
  • Death by Irony: Twofold. He is killed by the Emperor he is obsessively devoted to and is a Pyrus brawler who burns to death.
  • The Dragon: Like Kazarina, Gill shares the role of being one of Barodius' most loyal servants.
  • Driven by Envy: Gill grows incredibly jealous of Barodius favoring Kazarina over him from time to time. Eventually, Gill's jealously consumes him after Barodius promotes Kazarina as his new second-in-command and later Gill kills her in cold blood and tries to frame Fabia for it.
  • Fatal Flaw: Envy; as it is stated from the above, his growing jealousy toward Kazarina being the Emperor's second-in-command consumed him, which leads to him killing Kazarina in cold blood. Unfortunately, this also gets him killed by Barodius after the Emperor discovers him to be responsible for her death.
  • Hot-Blooded: Gill is very bloodthirsty, ruthless, jealous and merciless as his main attribute is Pyrus.
  • Manipulative Bastard: He tricks Zenet into spying on Kazarina and Nurzak, and give him important news of their plan to overthrow Barodius and after Zenet completes her task, Gill reveals that he tricked her and disposes of her when she is no longer useful.
  • Oh, Crap!: When Barodius reveals he already knows Gill killed Kazarina.
  • Undying Loyalty: To Barodius. Gill obeys and follows any order Barodius gives him and will execute and attack anyone who disrespects his rule over the Gundalians. But Gill's blind devotion leads to his downfall as his jealously towards Kazarina consumes him and he murders her in cold blood, which Barodius finds out later and kills him for it.
  • Villain Has a Point: Gill admonishes Kazarina for disposing of her subordinates, as he remarks that Ren was the only one available. Yes, he was a hypocrite, as he disposed of Zenet earlier, but he isn't wrong about what Kazarina has done to the other Agents.
  • You Are What You Hate: Even though Gill had nothing but hatred for Kazarina, he's actually more like her than he'd want to admit. Like Kazarina, Gill is obsessively devoted to Emperor Barodius, dabbles in manipulation, and is willing to throw others under the bus to get his way or when they no longer prove useful to him.
  • Yes-Man: Is this to Barodius.
  • You Have Outlived Your Usefulness: To Zenet Surrow after she successfully reported to him that Nurzak and Kazarina were going to overthrow Barodius.

    Airzel and Ventus Strikeflier 
Airzel voiced by: Eiji Miyashita (JP), Lyon Smith (EN)
Strikeflier voiced by: Daichi Endo (JP), Scott McCord (EN)
https://static.tvtropes.org/pmwiki/pub/images/airzel_gi.png
Captain of the Gundalian Forces and Gill's protege.
  • Arch-Enemy: Airzel is this to Captain Elright.
  • Brains and Brawn: The brains to Stoica's brawn.
  • Fantastic Racism: He has a absolute hatred of Neathians and loves killing or torturing them. He considers them an eyesore and takes delight in making them suffer during his onslaught on Neathia.
  • Senseless Sacrifice: When the Emperor had Dharak attack Gill for murdering Kazarina, he jumped in front of the blast to protect Gill. Unfortunately, the attack was powerful enough to destroy them both.
  • Too Dumb to Live: He recklessly rushes to Gill's aid, even though Dharak's attack will kill him in the process.
  • Undying Loyalty: Loyal to Gill to the point that when the Emperor found out that Gill murdered Kazarina, he is willing to sacrifice himself in a failed attempt to give Gill some time to escape.

    Stoica and Aquos Lythirius 
Stoica voiced by: Mitsuki Saiga (JP), Mike Kiss (EN)
Lythirius voiced by: Eiji Miyashita (JP), Shawn Meunier (EN)
https://static.tvtropes.org/pmwiki/pub/images/stoica_gi.png
Youngest member of the Twelve Orders.
  • Ax-Crazy: At one point, he was willing to used an ability to drown his enemies, unconcerned if he'll drown his allies in the process.
  • Ironic Name: His name is a reference to stoic, but there is nothing stoic about him.
  • Moral Myopia: Betraying his subordinates is okay, but when Dharak and Barodius betray him and Lythirus he considers it an abomination.
  • Nothing Personal: Dharak killing him and Lythirus is this, the two only were stopping Dragonoid Colossus and due this they're in Dharak's way, nothing else.
  • Undying Loyalty: To Barodius, and he was the only loyal Twelve Order other than Kazarina to never betray him. Sadly, Dharak has killed him alongside his Guardian Bakugan and Dragonoid Colossus.
  • You Have Outlived Your Usefulness: Dharak ends killing him, alongside Lythirius, because he considers to be more easy to kill Dragonoid Colossus while they're holding him back, than to wait for them to move.
  • You Monster!: To Dharak, when he betrays them and decides to kill them to kill Dragonoid Colosssus, since it's more easy that way.

Season 4: Mechtanium Surge

Arc 1

    Mag Mel & Darkus Razenoid 
Mag Mel voiced by: Ken Narita (JP), Shawn Meunier (EN)
Razenoid voiced by: Takaya Kuroda (JP), Hadley Kay (EN)

  • Big Bad: Of the fourth season's first arc.
  • Broken Faceplate: His mask gets shattered by Dan, revealing Emperor Barodius underneath it.
  • Chess Master: He's been pretty much one step ahead of everyone the entire season and the one time he actually lost, he still managed to come out ahead.
  • Cursed with Awesome: In Code Eve's defense, being imprisoned for eternity in armor made from your own evil would probably be And I Must Scream turf if Barodius hadn't found out a way to use it to feed off Chaos Energy and become even more powerful.
  • Devour the Dragon: Once Mistress Sellon outlived her usefulness, Mag Mel kills her and absorbs her energy to fuel his rebirth. He does it again to Anubias the very next episode.
  • Disk-One Final Boss: Is beaten half way through Mechtanium Surge after Drago evolves into Fusion Dragonoid.
  • Do Not Call Me "Paul": They dislike being reminded of their original identities. Dan and Drago taunt them about it.
    Drago: You were never better than me, Dharak!
    Mag Mel: HOW DARE YOU CALL HIM BY HIS OLD NAME! Dharak is gone! Only Razenoid exists!
    Dan: Sure, Barodius!
    Mag Mel: You're going to pay for your disrespect!
  • Emotion Eater: As if he wasn't already terrifying enough, he can eat fear in addition to energy.
  • Evil Cannot Comprehend Good: His being incapable of understanding that he lost because of Dan and Drago's Heroic Resolve and faith in their friends trumps his motivation of hate and anger.
  • Hidden Villain: Nothing was known about him at first, and his true identity is only made known when Dan shatters his mask, revealing he's actually Emperor Barodius.
  • Hoist by His Own Petard: Drago and Dan actually warned him and Razenoid that stolen power which wasn't their own would be their downfall. After Dan and Drago took the Gate and Key away from them, their stolen energy fails them, allowing Drago to kill Razenoid, Mag Mel being mortally wounded in the process.
  • Karmic Death: Subverted. While his own actions did lead to his downfall, he and Razenoid didn't die from those alone. They are the only main villains to date that Dan and Drago actually killed in battle.
  • Knight of Cerebus: His arc is considerably more frightening than the previous villains, do in part to the simple fact that unlike the previous Big Bads, he's not after anything. He's just a murderous Omnicidal Maniac whose goal is to destroy the world. Not to mention the fact he's spent most of his arc performing a truly horrifying Mind Rape on Dan and Drago. To put this in perspective, he attacked Gundalia and began burning it to the ground.
  • Made of Evil: Mag Mel's armor was created by Code Eve from Barodius' evil as a means to imprison him. It backfired.
  • Manipulative Bastard: He's pretty good at manipulating people, having pretty much created his two Co-Dragons to do this in Bakugan Interspace, since he was imprisoned at the time.
  • Mind Rape: Another thing he's been using his Psychic Link with Dan and Drago for. The worst part is, he actually seems to enjoy it!
  • Mook Maker: Can create Chaos Bakugan, mindless monsters existing only to destroy. He also created Anubias and Sellon.
  • Nothing Is Scarier:
    • So far, there's very little known about who or what he is except he was imprisoned for genocide and is an Omnicidal Maniac seeking to destroy Earth. Arguably, this makes him even scarier than the other main villains.
    • In-universe, part of what makes Dan and Drago so unnerved by him is the simple fact they have no idea where he came from or what he wants with them.
  • Not Quite Dead:
    • After Dan and Drago manage to unlock the power of the gate and key they have that he wants, they seemingly vaporize him. But it turns out he escaped and is continuing his plot, and he now has part of Drago's gate. It turns out he was a case of this all along as he's actually Emperor Barodius.
    • This would count to Emperor Barodius, due to everyone believing he and Dharak were killed by Code Eve. They were actually imprisoned in another dimension and became Mag Mel and Razenoid.
  • Omnicidal Maniac: If his minions are to be believed, his goal is to destroy the world. Considering it's said he was imprisoned for genocide, this is a pretty safe bet. And the first thing he did after being unleashed was attack Gundalia with the intent of burning it to the ground. His ultimate plan is revealed to be destroying Earth to let loose a Universe Wrecking Wave that will destroy every living thing in range of it.
  • One-Winged Angel: Turns out he is one for Emperor Barodius and Razenoid is one to Dharak. Razenoid eventually evolves as well.
  • Our Dragons Are Different: Dharak, a standard quadrupedal Western style dragon which was a refreshing change of pace. Continued to be different from the others when he evolved into Phantom Dharak. Then he became Razenoid, a freaking spider-legged dragon.
  • Orcus on His Throne: Justified at first because he was literally sealed on his throne. Then it's subverted as he's the first Big Bad to lead his forces on the battlefield the moment he was out of his prison and able to.
  • The Power of Hate: Is a firm believer in this. And is ultimately proven wrong when it's beaten by The Power of Friendship and Heroic Resolve.
  • Psychic Link: Drago's newest evolution resulted in him and Mag Mel being linked in this fashion. Mel is presently attempting to drain his energy to break free of his prison. He's also been using it to Mind Rape them both and later to read Dan's mind to find out what the Brawlers were planning. He eventually cuts it when Dan starts using it against him.
  • The Reveal: He's actually Emperor Barodius, encased in the armor of his own evil by Code Eve and imprisoned in another universe. The genocide he committed being his attempted destruction of Neathia.
  • Sadistic Choice: Makes the Brawlers choose between killing an innocent person and deleting his Chaos Bakugan army. Thankfully, Spectra and Dan both pull Big Damn Heroes moments to stop them from having to make the choice.
  • Sealed Evil in a Can: Presently imprisoned in another dimmension along with his Guardian Bakugan. Thankfully for him, he's got a Psychic Link to Drago whose got a good bit of excess power to spare. Once he's finally free, his first act was to launch an all-out attack on Gundalia. The reason for his imprisonment is revealed to be his attempted destruction of Neathia when he was Emperor Barodius.
  • Taking You with Me: He tries this on Dan after being defeated in "The Final Takedown." All the energy he's absorbed is released when he's defeated and he tries to use it to take Dan and Drago down with him.
  • That Man Is Dead: Mag Mel says this about his previous self Emperor Barodius.
    Mag Mel: No, Barodius is "dead" and now the mighty Mag Mel lives!
  • Took a Level in Badass: He's gotten much harder to beat now compared to when he was Barodius, not only getting much stronger, but much smarter.
  • You Have Outlived Your Usefulness: To Mistress Sellon after she successfully got the Key from Dan. He "rewards" her by slowly killing her and then absorbing her energy. He even told her and Anubias that this would be their fate once they were no longer of use to him. He does it again to Anubias an episode later. It's no suprise, as he's actually Emperor Barodius!

Team Anubias

     Anubias & Darkus Horridian 
Voiced by: Rob Greenway

The leader of Team Anubias.


    Jack Punt, Aquos Krakenoid & Aquos Ziperator 
Voiced by: Gil Anderson

    Ben, Pyrus Bolcanon & Pyrus Ziperator 
Voiced by: Drew Nelson

    Robin & Ventus Ziperator 
  • Blow You Away: After Anubias reveals himself to be one of Mag Mel's Co-Dragons and takes back Bolcanon and Krakenoid, he begins using Ventus Ziperator as his partner Bakugan.
  • Fire, Water, Wind: Unlike Ben and Jack, who exclusively use Pyrus Bolcanon and Aquos Krakenoid respectively, he switches back and forth between using Pyrus Bolcanon and Aquos Krakenoid as his partner Bakugan and after Anubias reveals himself to be one of Mag Mel's Co-Dragons and takes back Bolcanon and Krakenoid, he begins using Ventus Ziperator as his partner Bakugan from then on.
  • Locked Out of the Loop: He and the rest of Team Anubias are unaware of Anubias' true nature. Once they find out, they turn on him without hesitation.
  • One-Steve Limit: He share same name with a random kid that taken by the Gundalian in previous season.
  • The Stoic: Always looks serious and doesn't emote much.

    Noah & Subterra Ziperator 

Team Sellon

    Sellon & Ventus Spyron 
Voiced by: Katie Griffin

    Chris, Subterra Vertexx & Darkus Clawsaurus 

    Soon, Haos Krowll & Haos Spidaro 
Voiced by: Alyson Court

  • Heroic BSoD: After realized that She and Chris were only being used by Sellon, she loses her confidence and will to survive to the point of wanting to let the Chaos Bakugan kill her.
  • Light Is Good: She uses Haos Krowll as her partner. Unlike Chris, who switches from Subterra to Darkus, after Sellon reveals herself to be one of Mag Mel's Co-Dragons and takes back Vertexx and Krowll, she continues to use Haos as her attribute of choice, now using Haos Spidaro as her partner Bakugan.
  • Locked Out of the Loop: She and Chris are unaware of Sellon's true nature. Once they find out, they turn on her, but not before entering a state of Heroic BSoD.

Arc 2

    Mechtavius Destroyer 
Voiced by: Tyrone Savage
  • Asshole Victim: He won't be missed, considering he was an Omnicidal Maniac bent on slaughtering humanity, Bakugan, Vestals, Nethians, and Gundalians alike just to be supreme Mechtogan.
  • Big "NO!": Has one as he is finally destroyed by Dragonoid Destroyer in End of the Line, with his extremities in Slycerak, Exostriker and Mandibor being the first to disintegrate, before Coredegon follows, screaming in anguish.
  • Final Boss: He's the final villain of the second arc of Mechtanium Surge, and since Mechtanium Surge only has two arcs and is the final season of the original continuity, he's also the final villain of not just the season as a whole but also the original continuity as a whole.
  • Omnicidal Maniac: He was bent on wiping out humanity, Bakugan, Vestals, Nethians, and Gundalians alike just to be supreme Mechtogan.
  • Villainous Breakdown: Has one as his attack is slowly overpowered by Dragonoid Destroyer, before being completely overwhelmed and vaporized, screaming in anguish.

    Darkus Coredegon 
Voiced by: Tyrone Savage, Robert Tinkler (as Wiseman)
  • A Nazi by Any Other Name: He and his fellows intend to perform genocide on the Bakugan to pave the way for their new Master Race of Mechtogan. As can be expected, he considers everyone else, especially Bakugan, inferior to him and the other evolved Mechtogan.
  • Asshole Victim: He won't be missed, considering he was an Omnicidal Maniac bent on slaughtering humanity, Bakugan, Vestals, Neathians, and Gundalians alike just to be supreme Mechtogan.
  • Big Bad: Turns out that he and Wiseman were the same person, making him the true Big Bad of the season.
  • Big "NO!": Has one as he is finally destroyed by Dragonoid Destroyer in End of the Line, with his extremities in Slycerak, Exostriker and Mandibor being the first to disintegrate, before Coredegon follows, screaming in anguish.
  • Combining Mecha: Is able to combine with his three fellows to form the Mechtavius Destroyer. It also appears that he's the one who controls the combined form, forming the head, left arm, and core of the body.
  • Devour the Dragon: Does this to the Nonet Bakugan. He actually offers them the option to go willingly, but they try to fight back, only for him to kill them one by one and absorb them.
  • Hero Killer: Literally once he arrives on New Vestoria, he starts murdering previous heroes like they're nothing en masse. Not to mention leveling Bakugan city! Thankfully, the heroes managed to go back in time to stop him.
  • The Juggernaut: After going One-Winged Angel. Even Dragonoid Destroyer can't stop him and he's powerful enough to level an entire island in one strike. What does it take to finally stop him? Dragonoid Destroyer being powered up by the energy of every Bakugan and human bond on earth that rose his power to infinite. Even then, he manages to resist it for a good time, before being overpowered and vaporized once and for all.
  • One-Winged Angel: Mechtavius Destroyer probably counts, considering he controls it. Absorbed most the Nonets to turn into a gigantic version of Mechtavius Destroyer with enough power that, if he wasn't stopped, he could singlehandedly wipe out ALL Bakugan and level an entire city in one attack.
  • Rank Scales with Asskicking: Is the leader of the four Mechtogan and the most powerful of them. And according to the game, his G-Power exceeds that of a Mechtogan Titan. And that's without turning into Mechtavius Destroyer.
  • This Cannot Be!: He's completely incapable of believing that Dragonoid Destroyer's power has exceeded his own, even when he's being completely overpowered. Once he finally is overwhelmed, he suffers a Villainous Breakdown as he is destroyed for good.
  • Turned Against Their Masters: Inverted; he led his fellow evolved Bakugan against their creators. He later sought to exterminate all the Bakugan.
  • Villain Team-Up: Despite his hatred of Bakugan, he and his fellows are willing to work with Wiseman and his minions simply because they hate the Brawlers more. Subverted because he is Wiseman and it was all part of his plan to gain the power he needed to become completely self sustaining.
  • You Have Outlived Your Usefulness: The first thing we see him do is vaporize his creator now that he's evolved to the point he doesn't need him anymore. He now intends to do this to all Bakugan.

    Haos Exostriker 
Voiced by: Ron Rubin

    Pyrus Slycerak 
Voiced by: Hadley Kay

    Aquos Mandibor 
Voiced by: Andrew Jackson

    Wiseman and the Nonet Bakugan 
Darkus Betadron voiced by: Robert Tinkler
Darkus Kodokor voiced by: Brad Adamson
Darkus Mutabrid voiced by: Carman Melville
Pyrus Spatterix voiced by: Andrew Jackson
Subterra Stronk voiced by: Ron Rubin
Ventus Worton voiced by: Donald Burda
Aquos Balista voiced by: Andrew Jackson, Robert Tinkler
Haos Tremblar voiced by: Robert Tinkler
  • Band of Brothers: The Nonets, despite being evil, are close. They even call each other brothers.
  • Big Bad: Alongside Coredegon, though due to their common enemy, they are willing to work together at times. Though it turns out the original Wiseman was Coredegon, but Gunz briefly takes over as a second Wiseman.
  • Bitch in Sheep's Clothing: Wiseman seemed to be a Well-Intentioned Extremist, but turned out to be a disguised Coredegon who was just manipulating the Nonets into getting him the power he needed to continue his Evil Plan.
  • Rescued from the Underworld: The Nonet Bakugan were freed from the Doom Dimension by Wiseman.
  • Sealed Evil in a Can: Were imprisoned in the Doom Dimension by Drago's ancestor for their crimes.
  • Screw This, I'm Outta Here: Worton pulls one by fleeing to the Doom Dimension instead of staying behind to fight Mechtavius Destroyer.
  • Well-Intentioned Extremist: Seems to honestly believe seperating the humans and Bakugan is the right thing to do. Subverted, as it turned out to be Coredegon using the Nonets to get enough power to revive himself.
  • Villainous Valour: During their battle with Coredegon. They're completely outmatched, but they fight with everything they've got and one of them even pulls a "Heroic Sacrifice" in a desperate attempt to give one of his "brothers" the opening he needs to fight back. Spatterix even admits this!
    (after a failed attack) Betadron: I can't believe it! Not even a dent! This is hopeless!
    Spatterix: I can't believe you still have doubts, Betadron! You, in the Wiseman suit! Take him to the Doom Dimension! He can help you get your revenge against the Brawlers!
    Gunz: What?! I'm not leaving!
    Spatterix: Quit trying to be a hero! We're a little out-gunned here! If you don't leave now, you may never have another chance!

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