Ren Krawler

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Ren Krawler

Ren GI.png

Screen shot 2010-07-04 at 12.48.07 PM.png


Race Gundalian
Age 15 (NV)
16 (GI)
17 (MS1)
Gender Male
Brawling Information
Main attribute Darkus Darkus
Partner Bakugan Linehalt
First appearance Final Fury
Voiced by Hirofumi Nojima (Japanese)
David Reale (English, Ep. 1-9)
Peter Cugno (English)
Barodius never showed me loyalty like you have, I am fully committed to destroying him.
Ren, Forgiveness

Ren Krawler (レン・クロウラー, Ren Kurourā?) is a Darkus Brawler from Gundalia, the last descendant of the Protectors of the Dark Bakugan, and the partner of Darkus Linehalt.

He first appears in the finale of Bakugan Battle Brawlers: New Vestroia before being properly introduced in Bakugan: Gundalian Invaders. He originally worked for Barodius, thinking he could get his freedom, and infiltrated the Battle Brawlers to sway them to aid Gundalia in the Neathian-Gundalian War. In order to do so, he lies about the Neathians, claiming they were a war-loving nation and invaded Gundalia.

After Fabia Sheen exposes his lies, he returns to the Gundalians and fights against the Battle Brawlers. Once he realizes that the Twelve Orders were untrustworthy and held no care for him, he turns his back on them, joins the Neathian side, and becomes a Castle Knight.

After the collapse of the Twelve Orders, Barodius' apparent demise, and the end of the war, he returned to Gundalia. As of the events during Bakugan: Mechtanium Surge, he is currently the Commander of the Gundalian Forces, under the command of Prime Minister Nurzak.

Ren also made an appearance in the online game Bakugan Dimensions.



Ren starts off as a rather self-motivated person who, while he didn't oppose friendship, didn't view relationships very highly, aside from his bond with Linehalt. As the last descendant of the protectors of the Dark Bakugan, he and Linehalt were always forced to live underground. In order to attain freedom, Ren serves Barodius with the mission of finding and recruiting brawlers for Gundalia's war against Neathia.

He starts off having rocky relationships with most of his teammates and the brawlers. While Marucho trusted him, feeling indebted for the Phantom Data Ren gave him, Shun was suspicious of him from the start and had no problem with exposing his true purpose after hearing Fabia's side of the story. Ren's own teammates teased him when he forgot his mission due to his bond with the Battle Brawlers.

As the series progresses, he comes to value others more. While he didn't get along with Sid for most of the series, he tries to save Sid when Dharak attacks him, and Sid entrusts Ren with Rubanoid and Destrakon Gear before he chooses his own death. When he overhears about the disposal of his other teammates, he apologizes to them for their fate, especially in cases where he had taken part in the losing brawls that they were punished for.

After realizing that Barodius was just manipulating him, Ren discards his loyalty to him and turns to Neathia's side. However, he still respects his superior Nurzak, who also opposed Barodius' motives and actions. Even before betraying Barodius, he did not hold any grudges towards the Neathians and has displayed respect for them. Knowing that it would be better for a Pyrus brawler to use Sid's Bakugan, he entrusted Rubanoid to Linus Claude and seems to have become friends with him.


Bakugan Battle Brawlers: New Vestroia[edit]

Ren's debut

Ren makes his first appearance in the finale of the season, approaching Dan, Marucho, and Shun, asking if they were the Bakugan Battle Brawlers while they were in Bakugan Interspace.[1]

Bakugan: Gundalian Invaders[edit]

Ren gave the Battle Brawlers more Phantom Data, which allowed Marucho to make Bakugan Interspace available to everyone. He later battles Dan and Helix Dragonoid with his partner, Linehalt. As the battle intensifies Dan is knocked out and has a vision of Bakugan at war, surprising everyone except Ren.[2]

He tells the Brawlers that he is from Gundalia and tells them a story: how the Neathians attacked them and that their Bakugan are trained to be soldiers. Upon Fabia Sheen's arrival, he tells her that he is a Gundalian.[3]

When Sid and Zenet arrive in Bakugan Interspace, he and Dan brawl against them. Though Ren has a solid performance, he secretly throws the match so that he and Dan would lose, and Sid and Zenet—his actual partners—could take Drago. Although his plan works, Sid chooses not to take Drago due to the battle being unfair. He is later seen conversing with Linehalt about their plan working.[4]

In Exposed, he created a rift in the new battle arena because he thought that Dan was going to battle Jesse Glenn but it ended up that Fabia battled Jesse and the rift effected Aranaut. Shun exposes him to the brawlers after the battle and he denies everything and then runs off. Seeing as how Ren helped Marucho develop Bakugan Interspace and became good friends, he refuses to believe Ren is lying to them.

In True Colours, Ren loses to Marucho and then he said that they could still be friends if Marucho left the Brawlers but he said no. Ren also had trouble before that controlling his teammates and said that they couldn't just hypnotize the Brawlers because a hypnotized person only operates at seventy-five percent. He also said that any insubordination would result in him telling Emperor Barodius. Ren later reveals his true form. However, it is shown through their actions that Ren and Marucho may still care for each other, though in the end of the episode, Marucho was clearly upset at him for betraying the Battle Brawlers.

In Hostile Takeover, Ren leads the Gundalian brawlers to kidnap more children to brainwash into Gundalian soldiers. Dan confronts him, but Sid and Mason stay behind with two brawlers named Taylor and Casey to battle them. While they are battling, Ren secretly hacks into Interspace and forces the Battle Brawlers out. Afterward he tells them he is now in full control of Bakugan Interspace.

Ren as a child

Ren's dark past was revealed in Escape From Darkness. As a child, he was forced to be Linehalt's protector. He was initially scared of Linehalt at first but eventually became close friends with him after Linehalt saved him from falling from a ledge. The two spent most of their time together training and sharpening their skills. As Ren got older he asked Linehalt if they would ever see sunshine in their lifetime. Under the illusion of fulfilling that wish, Emperor Barodius himself appointed him to lead a team to Earth. After finding out Marucho infiltrated Bakugan Interspace he confronted him. Marucho was willing to brawl Ren to determined who would leave Bakugan Interspace but then Ren revealed the outcome of Fabia's battle against Lena and Zenet, letting Marucho ran off to help Fabia.

In The Secret Package, he and Jesse team up to battle Shun and Linus. Even after using his Boomix, he is defeated by Linus. However, Jesse ultimately wins the brawl and takes Linus' Bakugan.

In The Element, he and Kazarina are seen talking about a Bakugan belonging to a Castle Knight. Kazarina gets suspicious that this Bakugan might be the one who possesses the Element, so she orders Ren to bring it to Gundalia so that she may examine it. Despite his attempts to do so, Sid stole Neo Ziperator so that he could seek a grudge match against Dan. Left with no other choice, Ren was forced to simply watch the brawl and hope Sid could win. Ultimately however, Neo Ziperator passed the Element on to Lumino Dragonoid, putting it back in Neathian hands.

In Twin Evil, after hearing from Zenet that the Brawlers were going to Neathia, he ran to follow them but just when he arrived to the scene, the Brawlers had already escaped.

In Curtain Call, after figuring out that Jesse ran away in the middle of the night from Kazarina and Stoica, Ren goes to follow him. He then, tags with Jesse against Fabia and Jake, the result of the match ended in a loss. He then brings Jesse back to Gundalia, and watches him and his partner Plitheon perish before his eyes. Ren ultimately felt sorry seeing it happen, stating that he also took part in the battle that resulted in the loss, but Kazarina told Ren to speak to Emperor Barodius about it himself, showing little to no disdain for Jesse's apparent demise.

In The Secret of the Orb, he battles Fabia and Marucho alongside Nurzak. The battle ended in a tie due to the interruption of the Sacred Orb, which was presumably angered by Ren and Marucho (former friends) fighting against each other.

In Mobile Assault Kazarina asked Ren to bring more battlers from Earth, which the latter agree with her. Later in Bakugan Interspace, annoyed by Stoica complaining about why should he be here, Ren told him to just get in his human form. After that is done, Ren told him to they should go get battlers, but the latter retorts, saying that he prefer to look for battlers in their natural habitat. Linehalt did try to convince Ren to reconsider their loyalty to the Twelve Orders as they show them none.

In Sid Returns, he fights off against Dan and his new Mobile Assault Vehicle. Dan attempts to convinces him to switch sides, but he refuses. Just when things were looking bad for Ren, Sid suddenly appears and joins the fight. Despite the momentary two-on-one advantage, they end up losing. Sid then explains that he and the rest of Ren's team (minus Mason, who also escaped) weren't killed, but simply held in stasis in Kazarina's lab. Just then, Dharak shows up to punish Sid for escaping. He blasts Sid, who nearly falls in a ravine. Ren grabs his hand and attempts to pull him back to safety, however, Sid gives Ren Rubanoid and lets go, ultimately falling to his death.

In Colossus Dharak, he accompanied Barodius on a mission to permanently destroy the second shield. Dan fought against Barodius and lost, leaving Barodius to order Ren and Linehalt to finish him off. However, he turns against Barodius at the last second, having finally realized his master's true motives, and attacks him with Linehalt and Boomix.

In Dragonoid Colossus, he fights Barodius to protect Dan and the rest of the Brawlers. He manages to hold his own for a while, but suddenly Linehalt reveals his Forbidden Power which nearly destroys the planet. The Sacred Orb sends out Dragonoid Colossus in response, which defeats both Linehalt and Dharak before disappearing into Dan's BakuMeter. After the battle, he believes he needs to live in isolation because of the dangers of the Forbidden Power, but the Brawlers convince him to come back with them. He expressed happiness at their decision and transforms into his human form, although Fabia still appears skeptical of his intentions.

Ren's Castle Knight suit

In Forgiveness, he is left behind on the battlefield by Fabia after returning to Neathia. When Marucho goes back to look for Ren he is nearly eaten by a carnivorous plant but Ren saves him. He then brings food for Marucho, and comments that he doesn't deserves his forgiveness. Marucho tries to convince him that he has already been forgiven by the Brawlers but Fabia appears, challenging him to a brawl. Ren battles against her to prove his new loyalty to the Neathians. He fights with Linehalt and loses, most likely due to Linehalt's exhaustion from having just used his Forbidden Power. Ren uses Rubanoid to compensate for Linehalt's weakness, but is still unable to win. After his loss, he is actually seen crying as he thinks he has failed Sid. Fabia then accepts him in despite her previous terms. Ren later becomes a fully-fledged Castle Knight despite being a Gundalian.

In Infiltrated, he declares that he wants to rescue his surviving former teammates from Kazarina's lab. He, Mason, Nurzak, and Fabia split off from the rest of the group to search for them. In the next episode, they split into two smaller groups and Ren is paired off with Mason to continue on his objective.

In Redemption, he and Mason finally reach the lab, only to find that Lena, Jesse, and Zenet have been removed from their stasis tubes. The two of them then meet up with Fabia and are surprised to see Nurzak and Sabator gone, leaving Fabia to explain that they were lost in a brawl with Stoica and Kazarina.

In Final Strike, he and Fabia reunite with Shun and Marucho, but not before mistakenly attacking them due to their disguises as Gundalian soldiers. The group goes to Nurzak's secret lair to meet with Mason. The Brawlers later launch an assault on Barodius' castle, and Ren stays behind to delay Gill.

In Dream Escape, he and Linehalt reunite with the other Brawlers and begin to battle the Twelve Orders.

In Gundalian Showdown, he battles the Twelve Orders with the other brawlers and manages to escape to Neathia on Dragonoid Colossus. It is also revealed that before he left to go to Gundalia, he entrusted Rubanoid to Linus, as he thought that Rubanoid would be better off with a Pyrus brawler.

In Broken Spell, he briefly battles the hypnotized Jesse and Plitheon until Kazarina's hypnosis breaks, and later joins his fellow brawlers and former teammates in a final showdown with the Gundalian army.

In Code Eve, he and Linehalt battle Phantom Dharak but are defeated easily.

In Destiny Revealed, he says goodbye to Marucho and the Brawlers and returns to Gundalia with Nurzak and his former teammates.

Bakugan: Mechtanium Surge[edit]

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Ren appears briefly in Back In Sync in a photo with Jake and Fabia on Neathia in their Castle Knight uniforms when Marucho looks back on his life as a brawler.

In Gundalia Under Fire, the Battle Brawlers returned to Gundalia to help him defend his home from the raiding Chaos Bakugan. It is revealed that he is now the Commander of the Gundalian Forces. He then tells them that Mag Mel invaded Gundalia and that he seems to be heading for the palace. Just then, Dan gets a vision that Mag Mel is heading through Dalia's Valey and Ren comments that the route would lead straight to the palace. Then Marucho decides to launch a sneak attack on Mag Mel. Unfortunately, Mag Mel reads Dan's mind and catches on to their plan. Mag Mel then makes quick work of everyone except for Dan and the two engage in a prolonged brawl. Ultimately, Mag Mel proves victorious against him as well. Later, Ren overhears some Gundalian soldiers discussing Dan's link to Mag Mel and wonder if they can really trust him, to which Ren scolds them, though he also secretly wonders the same thing.

In Battle Lines, he can be seen with the Battle Brawlers and Captain Elright discussing their next move. He watches in shock when Dan grabs Marucho by the collar. He then later tells Dan, Shun, and Marucho that Rafe and Paige have gone after Mag Mel.

In Unlocking the Gate he is first seen telling Linehalt not to let the Chaos Bakugan go through. After Dan defeats Mag Mel, he watches as all the Chaos Bakugan disappear.

He makes a brief appearance in The Final Takedown looking up at what is left of Gundalia's Dark Moon in a non-speaking cameo appearance.

Bakugan Dimensions[edit]

Ren was a non-playable character in the game and could be challenged as a brawling opponent.


Bakugan: Gundalian Invaders[edit]

Bakugan Dimensions[edit]

Brawling Record[edit]

Ren has proven himself to be an excellent brawler, though his on-screen track record has been marred by facing against the Battle Brawlers (the protagonists) so often.

Bakugan: Gundalian Invaders
Opponent(s) Episode(s) Outcome
Dan Kuso 1 No Outcome
Sid Arkale and Zenet Surrow (Tag with Dan) 5 Lose (deliberately)
Marucho Marukura 7 Lose
Shun Kazami and Linus Claude (Tag with Jesse) 11 Win
Fabia Sheen and Jake Vallory (Tag with Jesse) 18 Lose
Fabia Sheen and Marucho Marukura (Tag with Nurzak) 19 No Outcome
Dan Kuso (Tag with Sid) 23 Lose
Barodius 25 Draw
Fabia Sheen 26
LoseMostly the result of Linehalt's exhaustion, lost with Rubanoid
Gill 34-35 No Outcome
Gill, Kazarina, Stoica, and Airzel (Tag with the Battle Brawlers) 36 Win
Jesse Glenn 37 No Outcome
Barodius, Stoica, and Airzel (Tag with the Battle Brawlers, the Gundalian Agents, the Castle Knights, and Nurzak) 37-38 Lose
Bakugan: Mechtanium Surge
Opponent(s) Episode(s) Outcome
Chaos Bakugan (Tag with the Battle Brawlers) 17 No Outcome
Mag Mel (Tag with the Battle Brawlers) 17 Lose
Chaos Bakugan (Tag with the Gundalian Forces and the Castle Knights) 18-19 Win


  • Prior to being revealed as an antagonist, the official website spoiled the fact that Ren was working for Barodius.
  • Ren is the only major character to be recast partway through his respective season.
    • He is, however, not the only main character to be recast overall. Ace was also recast towards the end of New Vestroia. Coincidentally, Ace's second voice actor was also Ren's first voice actor.
  • He is the only one of the Gundalian Agents to have an intermission screen that shows their real form.
  • He is the earliest of the six/seven antagonists to change sides in the series, joining the Brawlers less than two-thirds of the way through the season.
  • Out of the three villains to swap sides, he is the only one without a mask. Instead, he uses something to change his entire appearance.
  • Ren's name could possibly be reference to the Ren, a part of the soul in Egyptian mythology.
  • He has a resemblance to the Beyblade: Metal Fusion character Ryuga, most notably their similar hair color and reptilian-like eyes. Also, the strange headband Ryuga wears looks very similar to Ren's forehead in his true form.
  • Ren's appearance and initial role in the story are similar to Vector's from Yu-Gi-Oh! Zexal II; both are posing as a friend of the main character, who in reality work for an opposing alien faction whose members disguise themselves as humans to blend in on Earth. Ren and Vector, in their true forms, also have similar color schemes. Hower, Vector (along with Don Thousand) end up being the main antagonists, whereas Ren eventually sides with the Brawlers.
  • Ren is the only Gundalian to have been in three Battle Brawlers seasons: from New Vestroia to Mechtanium Surge.