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Bakugan: Mechtanium Surge is the fourth season of Bakugan Battle Brawlers. The series premiered in Canada on February 13, 2011, United States on March 5, 2011 and Australia on March 8, 2011.

Although the season was initially going to have 26 episodes, it was expanded to 46 episodes.

Note: The Japanese episode titles are taken from the Vietnamese version with Japanese audio.

Episode List

# Title Japanese air date English air date
01 "Interspace Showdown" July 7, 2013 February 13, 2011
Almost been one year since the events in Gundalia, Bakugan Interspace has grown tremendously. Marucho has teamed up with a Bakugan from Gundalia, Aquos Trister, while Shun's partner is Ventus Taylean, a Bakugan from Neathia. After winning a battle, Dan and Drago learn that there have been two teams of brawlers, Team Sellon and Team Anubias who have risen to high ranks not far behind Dan. Dan has a nightmare the following night in which a mysterious entity demands that Dan give him something. Drago, who also had a vision of a Bakugan during the earlier battle, speculates that the two events may be related. Unconcerned by this deadly and skilled competition, Dan challenges Ben, a member of Team Anubias to a brawl. Dan and Drago initially struggle due to the battle environment and being faced against two Bakugan. They struggle and just before they are about to lose, the entity again appears to Dan (Drago sees the image of the Bakugan) and tells him to release his hidden power and destroy Ben and his Bakugan, also giving him all the power. They ultimately pull out a win after unleashing his power. However, Drago is unable to control that power nearly destroying the arena. This leaves Dan and Drago wondering about the dangers of this latest discovery and if they are a threat to the Earth.
02 "Mechtogan Mayhem" ("Iron Giant")"Koutetsu no Kyoujin" (鋼鉄の巨人) February 20, 2011
After Dan's battle with Ben, Marucho and Shun talk to Dan about having Drago sit out for a while. Dan, however, shrugs it off and says he'll get Drago's powers under control, but secretly, he's extremely nervous about the amount of power Drago unleashed, and the two of them decide to go train to get it under control. Meanwhile, Marucho decides to have a battle to make up for Dan having to sit out, so he fights against Jack of Team Anubias. He and Trister struggle to win against Jack and his Guardian Bakugan, Aquos Krakenoid. Meanwhile, Dan and Drago locate an abandoned arena to use as a training ground, but shortly after, a mysterious Mechtogan that calls himself Zenthon appears and wreaks havoc on the arena. Dan and Drago try to defeat it, but it eventually flies away and reappears to interfere with Marucho and Jack's battle and devastating the arena. Anubias and Sellon team up to fight Zenthon but struggle to defeat it, not even managing to land a hit. Eventually, however, Zenthon flies off and Anubias and Sellon part ways. Marucho and Shun then speculate that, since Zenthon has the same destructive power as Drago, they may be connected. Meanwhile, the masked man, whose named is officially revealed to be Mag Mel, is trying to break free of his prison, but requires more energy from Dan and Drago to do so. One of his hooded servants (who looks a lot like Sellon) informs him of the Mechtogan attack. He is astounded that Drago has that sort of power and tries to absorb more energy from Dan and Drago and begins to break free.
03 "Disconnect" February 27, 2011
After Dan refuses to sign a few autographs and say hello to his fans, Anubias challenges the "big shot" to a brawl and Dan accepts the challenge. Both win one round because Drago tries too hard to control his powers and didn't focus on the battle. Dan is afraid of another power overload, so he tells Drago to run and not to fight. Anubias uses the opportunity to strike Drago and wins the brawl. Upset by the loss, Noah, one of Dan's biggest fans who had stood up for him earlier, becomes one of Anubias' fans. After the brawl Anubias tells Dan that he is disappointed that Dan brawled like an amateur, but still saying that he has respect for him.
04 "Fall From Grace" March 6, 2011
Shun and Marucho find Dan and Drago training secretly and they discover that the Mechtogan Zenthon originally came from Drago. The next day Sellon and Dan have a match, but Shun and Kris from Sellon's team battle alongside making it a tag-team battle. Drago has a lot of difficulties controlling his powers and almost releases Zenthon, but Shun prevents this from happening by syphoning off Drago's excess power. Dan and Shun manage to pull out a win, but Sellon throws the battle and wins over the audience. Shun confronts her as to why she let them win to which Sellon offers Shun to join her team which he declines.
05 "Tri-Twister Take Down" March 13, 2011
Tension between the Brawlers rises when Shun suggests that Dan take a break from battling as to avoid another of Drago's power overloads. However, Dan interprets this as Shun not trusting him and they have a fight. Shun is later confronted by Sellon, who still wants him on her team, and suggests that he give Dan some tough love. Later, the Brawlers are challenged by two boys calling themselves the Tri-Twisters. Shun and Marucho decide to take it themselves without telling Dan but have trouble against the opponents. Dan discovers this and wants to help, but begins to realize that Shun may have had a point earlier. They then discover that there is a third Bakugan, previously attacking invisibly, present. Sellon and Anubias suddenly interrupt the battle, wanting to teach the boys a lesson in honor and easily defeat them.
06 "Agony of Defeat" March 20, 2011
Dan still refuses to listen to Shun and Marucho when they tell him to take a break from battling. Even though he is still plagued by nightmares about Mag Mel and Razenoid, Dan doesn't mind battling Anubias with the winner being crowned the official number one brawler of Bakugan Interspace. Shun and Marucho tell Dan that they still think he should not fight, but will support him anyway. Dan thanks them and promises to reveal everything after the battle. During the fight, a vision of Mag Mel and Razenoid appear and Dan and Drago think they are fighting them instead of Anubias, causing them to lay waste to the field and endanger the crowd. To make matters worse, Zenthon reappears and everyone learns that Drago created him. Once Zenthon leaves, Dan and Drago's vision are returned to normal. The battle is declared over and Dan is disqualified for illegally using Zenthon (even though it was unintentional) and Anubias is crowned number one of Bakugan Interspace. Unable to face his fans who have turned against him, let alone his friends, Dan packs up his things and leaves.
07 "BakuNano Explosion" March 27, 2011
Dan and Drago have disappeared and all sorts of negative rumors are spreading throughout interspace. Team Anubias is dominating the battle field now that Anubias is number one in the rankings. Shun and Marucho arrive in Interspace and discover that brawlers are now using BakuNano, equipment much like Battle Gear that greatly strengthens and amplifies a Bakugan's abilities to innumerable uncontrollable power levels. When they question Dylan, they discover that the upgrade for the BakuNano just appeared out of nowhere. Sellon has another talk with Shun and suggests that he take the position of leader of the Brawlers and put an end to BakuNano use since Dan and Drago are gone. Their conversation is interrupted when Marucho is brutally defeated in battle by the Bash Brothers, two boys using BakuNanos. Shun arrives on the scene and battles the two brothers. He managed to defeat them despite not using any BakuNano himself. He speaks out to the crowd that as the new leader of the Brawlers, he will abolish the harsh and dangerous style of brawling accidentally set off by Dan and Drago. Sellon is then seen stating that Shun has fallen right into her trap. The episode ends with Dan and Drago suddenly arriving at New Vestroia.
08 "Return to New Vestroia" April 3, 2011
Dan and Drago arrive in New Vestroia to train in an attempt to control his new powers. In Drago's secret training area, Dan and Drago find Aquos Amazon, Preyas' student, and Preyas himself. Amazon, having heard all about Drago from Preyas, wishes to battle with Drago. However, Dan and Drago are unsure as they may lose control again. Dan determines that each time Drago has lost control it has been in Bakugan Interspace, a virtual world, and the result may be different in the real world. While Drago and Amazon begin battling, Mag Mel and Razenoid begin feeling Drago's immense power, deducing that he is battling in the real world. During the battle, Dan and Drago suddenly have another vision of Mag Mel and Razenoid and they pass out. Preyas and Amazon leave while Dan and Drago rest. Back in Bakugan Interspace, Shun is dominating the battle field and defeating opponent after opponent. Marucho is impressed but thinks that Shun should take it easy. Shun, however, brushes him off and declares that as the new leader of the Brawlers, its up to him to get the Brawlers back on top but Marucho wonders whether as a member of the Brawlers, he should have a say. Back on New Vestroia, Dan and Drago are worried that their visions have carried into the real world, while Mag Mel and Razenoid have found them in New Vestroia.
09 "Chaos Control" April 10, 2011
Mag Mel sends Anubias to New Vestroia to battle Dan and Drago and harness their power. Drago, however, wishes to train on his own and away from Dan. Just as Anubias arrives, he attacks Preyas and Drago with Dan and Amazon making their way to Drago. Preyas steps in to defend Drago, but Anubias summons his own Mechtogan. Preyas proves to be no match for the Mechtogan, putting Drago into a rage and causing him to summon Zenthon. Drago loses control of his powers and lays waste to the battlefield, but Dan manages to snap him out of it. Zenthon attacks Drago and Drago determines that they will have to tame Zenthon in order to control it, which they manage. However, Anubias continues to attack Drago, but Zenthon stops them and Dan and Drago defeat Anubias, causing him to flee. Preyas and Amazon vow to help Drago control his new powers.
10 "A Royale Pain" April 17, 2011
Shun has been battling far more frequently since taking the position of leader of the Brawlers, and it's starting to take it's toll on him. However, he shows no signs of backing down when he enters a battle royale. Things get tough when up against Robin from Team Anubias and Soon from Team Sellon when Taylean suddenly spawns a Mechtogan, Silent Strike. Shun tries his best to defeat it and is rescued by Rafe and Paige. After Silent Strike flees, Rafe and Paige reveal that they are a Neathian and Gundalian, respectively. They have learned that the Mechtogans are the offspring of chaos when there is a lack of sync between a brawler and their Bakugan and Princess Fabia has sent them to help the Brawlers. Shun, however, refuses the help and leaves while Marucho's father asks him to quit the Brawlers.
11 "Back In Sync" May 1, 2011
Drago continues to struggle gaining control of Zenthon and worries that it is because he and Dan are out of sync so they continue training on New Vestroia. Paige and Rafe worry that the Brawlers are slipping and Marucho thinks about his father's offer to quit the Brawlers and fix Bakugan Interspace properly. Wavern suddenly reappears and speaks to Dan and Drago and tells them that they must reconnect with everyone, namely their fractured relationship with the Brawlers. Marucho takes his father's advice and quits battling and work in his family's company with his father, but Trister convinces him otherwise. Marucho fights Jack of Team Anubias and wins, thanking Trister for reminding him that friends stick together no matter how far apart they are. Marucho's father and Kato witness the battle and express their pride in Marucho. Dan and Drago finally get back in sync and Wavern encourages them to find out the truth behind their visions.
12 "Mind Search" May 8, 2011
Wavern assists Drago and Dan in ridding them of their nightmarish visions while Bakugan Interspace holds a Capture the Flag style battle. Marucho attempts to dissuade Rafe and Paige in joining, but they declare that they have no reason to avoid battle. As expected, Shun joins the fight to try and control the chaos. Rafe and Paige struggle against Team Anubias, but Marucho arrives to assist them and Team Anubias is eventually defeated. Meanwhile, a weary Shun and Taylean encounter Team Sellon. Marucho and Trister arrive at the flag but Sellon intercepts them and defeats Marucho. Paige and Rafe arrive just as Sellon summons her Mechtogan, Braxion. Rafe and Wolfurio distract the Mechtogan allowing Paige and Boulderon to take the flag and win, all according Marucho's plan. Shun arrives and sees the success of Marucho's plan and believes that his solution may have been wrong. Dan and Drago see Mag Mel and Razenoid again, following which Dan realizes Code Eve is involved.
13 "Re-connection" May 15, 2011
Shun refuses to listen to Marucho's reasoning so Marucho enters a tournament to battle Shun. Meanwhile, Wavern suggests to Dan and Drago to go back to the memories to when they first met Code Eve and how Dan and Drago received their powers. After doing this Dan and Drago realize an important clue they missed when Code Eve gave them their powers. Back in Interspace, it's a fierce battle between Marucho and Shun but Shun wins. However, Shun has taken Marucho's words to heart and realized the error of his ways. He and Marucho patch things up and promise to work together now. At the end of the episode Mag Mel tells Anubias and Sellon on why Dan and Drago can't control their powers and assigns Sellon to travel to New Vestroia and capture Dan and Drago by any means necessary.
14 "Triple Threat" May 22, 2011
The Brawlers, now back together, are dominating as a group and face Team Anubias in the next round. Sellon arrives on New Vestroia and fights Dan and Drago. Although they put up a good fight, Drago is forced to summon Zenthon, who now fully obeys Drago without question. Things take a turn for the worse when Sellon suddenly summons three Mechtogan at once! Dan, Drago and Zenthon combine their power and end up summoning a Mechtogan Titan, which easily wipes out Sellon's Mechtogan. Sellon tells them they can keep their gate and key and that the end of the world is still coming before she leaves. Back in Interspace, Chaos Bakugan are suddenly released and start destroying Interspace, interrupting the battle between the Brawlers and Anubias.
15 "Interspace Under Siege" May 29, 2011
With Bakugan Interspace under heavy attack from Chaos Bakugan, the Brawlers quickly jump into action. Anubias gives his team all his Bakugan before meeting up with Sellon to observe. The Brawlers make a plan to lure all the Chaos Bakugan into a single area and then delete it, despite the massive damage it could cause to the system. The plan is successful, but Marucho is halted by a lingering Team Anubias. All of a sudden, a mystery figure enters and when the dust parts, it is none other than Spectra! Spectra easily wipes out all the Chaos Bakugan with Darkus Infinity Helios when all of a sudden Team Anubias and Team Sellon's Bakugan attack them, followed by another wave of Chaos Bakugan. Having felt the distress in New Vestroia, Dan arrives at Interspace with Drago to help the fight.
16 "A Hero Returns" June 5, 2011
Dan arrives back in Interspace much to everyone's shock and attempts to use Zenthon to shows the others that he and Drago are finally in control of their powers. While at first Drago and Zenthon are battling well, the latter is suddenly no longer under Dan's control and Mag Mel receives a massive flux of power. Anubias and Sellon retreat as the Brawlers leave the section of the Interspace which is then deleted by Marucho. Before departing, Spectra informs Dan that he has changed greatly and that the Brawlers aren't the team they used to be. The rest of the Brawlers mercilessly pile on Dan for leaving them to fend for themselves. Suddenly, Mag Mel and Razenoid break free and assembles a massive force of Bakugan. Later that night after being frustrated by his friends' hurtful words, Dan sees a vision of Gundalia being attacked by Chaos Bakugan! Marucho, Shun, Rafe and Paige prepare to head out to help Gundalia with the intention of leaving Dan behind due to the danger he represents. However, Dan insists on coming stating that he is the original Battle Brawler and will not be cut out off this fight.
17 "Gundalia Under Fire" June 12, 2011
The Brawlers arrive on Gundalia and hook up with their old friend Ren, who has now risen through the ranks of the Gundalian Army. Fabia, now the Queen of Neathia, is preparing to send reinforcements. Dan has a vision of Mag Mel's troop movements and the Brawlers set up a trap. The Chaos Bakugan arrive and Rafe gives Dan Bakunano as the Brawlers begin to attack. Mag Mel and Razenoid arrive and Mag Mel reveals that while Dan has had vision of Mag Mel, Mag Mel has in turn been having visions about Dan. Dan and Drago summon Zenthon while Mag Mel counters with summoning his own. The power is too great and Dan loses. Mag Mel and the Chaos Bakugan retreat as the Castle Knights arrive and the Brawlers begin to observe Dan's link to Mag Mel as a liability to their security.
18 "Battle Lines" June 19, 2011
As the Brawlers mount another attack on the Chaos Bakugan, Dan is forced to sit the battle out due to the compromise of his psychic link with Mag Mel. Dan receives another vision and realizes that Mag Mel is only after him and Drago, so they set out to confront him. On the way, they are intercepted by Shun and Taylean, who try to stop Dan and Drago from proceeding. Suddenly, Anubias and Sellon arrive and attack with their Mechtogan. Shun is taken out and Dan fights back with the help of Zenthon and Zenthon Titan and Marucho suddenly appears to help. Though they win, Marucho berates Dan for disobeying his orders. Ren reports that Paige and Rafe are missing and have likely gone after Mag Mel. Dan, Shun and Marucho go after them but fall into a chasm.
19 "Unlocking the Gate" June 26, 2011
Dan heads off to fight Mag Mel, one on one and learn more about this Gate and Key he keeps talking about. When he reaches the inner chambers of Mag Mel's fortress, Mag Mel reveals that the Gate and Key is a mutated version of the Switch Code that Code Eve gave to Dan and Drago. Anubias and Sellon appear as Mag Mel summons several Mechtogan. The other Brawlers arrive but prove to be no match for the Mechtogan. So, Dan and Drago share their powers with the others, allowing them to summon their own Mechtogan. Spectra also arrives on the Vestal Destroyer and the Chaos Bakugan and Mag Mel are defeated. Dan realizes his mistakes with his friends and once again become the leader of the battle brawlers. Despite their victory Razenoid was able to collect the gate meaning that Mag Mel only needs the key from Dan to achieve his goal.
20 "True Colours" July 3, 2011
The Brawlers receive an urgent message from Bakugan Interspace and return there only to discover it in ruins and infested with Chaos Bakugan. They meet up with Team Anubias and learn that after they left for Gundalia, the Chaos Bakugan returned and destroyed most of Interspace, making it unable for people to log out. Chris and Soon arrive and Marucho discovers an old access point from which they can escape and Soon sends Sellon their coordinates. While they sneak off to the access point, Dylan reveals that he is just a package of data created by Interspace to grant the desire of Brawlers for more intense battles. Anubias and Sellon appear and reveal themselves, in their true forms as well as the fact that they were created by Mag Mel. This was a surprise of their teammates and the Brawlers. Rafe and Paige successfully take the other battlers to a safe spot and return to help Dan, Shun and Marucho. With Sellon and Anubias defeated, they return to the access point, only to discover that it has been damaged! Shun blames himself for causing it when all of a sudden, a rainfall not programmed into the system began to fall.
21 "Dangerous Beauty" July 10, 2011
The Brawlers are trapped inside Bakugan Interspace and to make matters worse, Chris and Soon arrive with an injured Sellon, sure that she has changed her ways. They claim that Sellon was attacked by Mag Mel after failing in her previous battle at that she used that last of her strength to escape but was hunted down. Dan agrees to trust her, but Shun was suspicious thinking it was a trick. While Brawlers fend off an attack, Sellon asks Dan to see her and when he did she attacked him and stole his Key. Shun arrives and chased but was stopped by Chris and Soon, unaware that Sellon is still evil. The distraction allowed Sellon to escape. Sellon gives Mag Mel the Key, but he disintegrates and absorbed her declaring that her will to live would be better served as fuel for his Resurrection. The episode ends with Anubias jumping off a building preparing to battle Dan.
22 "Unfinished Business" July 17, 2011
Anubias kidnaps Noah in order to get Dan to fight him in one last showdown. After being informed of this Dan arrives for the battle and Noah (freed after serving his purpose) and Shun observe the battle. Anubias tries many ways to gain the upperhand including using three Bakugan at once and later combining two of his own through mutation. He briefly gains an advantage due to the mutations but Dan regains control after summoning Zenthon. As the battle reaches its climax, Mag Mel's eyes appear in the sky.Mag Mel takes Anubias' power, disintegrating him in the process. As Dan and Noah mourn Anubias' loss, Mag Mel is now much stronger and more powerful than ever.
23 "Behind the Mask" July 24, 2011
Dan and Drago are fighting the Chaos Bakugan, when they see a vision of Mag Mel saying that his power is nearly fully restored. He tells the Brawlers this, then declares that he will use his psychic link to battle Mag Mel. Shun and Marucho think it is too dangerous, but Dan argues that it is their only chance to stop him. Then Soon and Chris are mourning the loss of Sellon, when a Flash Ingram attacks. They are then saved by Noah who is using his new Guardian Bakugan Subterra Ziperator. Then the whole of Team Anubias shows up, all with Ziperators as their Guardian Bakugan. Ben has a Pyrus, Jack has an Aquos and Robin has a Ventus. When Soon questions why they still fight when Anubias is gone, they reply that they fought under him, but not for him. Meanwhile, Dan links up with Mag Mel and Dan and Drago find themselves in a dark reverse version of Bakugan Interspace. Mag Mel reveals himself and they begin to fight. They quickly summon their Mechtogan and they all fight their counterparts. The battlers then summon energy blades corresponding to their attributes. Meanwhile, Chris and Soon are sulking outside Brawler HQ. and are attacked by more Chaos Bakugan. They are saved by the Brawlers and Team Anubias, who are protecting Dan and Drago. Chris and Soon soon join in with their new Guardians Darkus Clawsaurus and Haos Spidaro. Marucho is trying to get a message out to the outside world, when Dylan offers to help. Meanwhile, Dan smashes off part of Mag Mel's mask revealing him to be Barodius. Razenoid then confesses to have been previously Dharak. They say that Code Eve imprisoned them in the reverse dimension. They then summon their Mechtogan Titans and continue the fight. After a huge display of power, they lose the link, in Brawler HQ. They tell all of their allies their findings. Dylan then helps Marucho talk to his father and Marucho tells his father his plan.
24 "Interspace Armageddon" July 31, 2011
Marucho announces his plan to the Brawlers to completely delete Bakugan Interspace. He thinks that he can rid Mag Mel of his energy source from Bakugan battles and to get rid of his portal to Earth. The Brawlers realise that they would be deleted too, and Marucho explains that his father and Kato are getting them out. They think that they might be able to delete Mag Mel since he's in the reverse Interspace. The Brawlers then fight their way out of their HQ, but more Chaos Bakugan come. Dylan says that he doesn't understand humans, since they're now destroying Interspace after all of their work. He then watches the fight. The Brawlers make it to the last remaining battlers, who don't believe that they can get out. Kato acitvates the emergency activation point and then starts the deletion programme. Then Dylan leads the Chaos Bakugan to the Brawlers. Team Anubias and Team Sellons Bakugan show up to try and stop the Brawlers. The Brawlers start to fight off the Chaos Bakugan, when Braxion shows up. Chris and Clawsaurus try to fight him off, with help from Soon and Spidaro, but the Mechtogan shield is too strong. Shun protects the remaining Team Sellon, while Team Anubias try to take out their old Bakugan. Then Horridian turns the tables and takes out a couple of Ziperators. Then Krowl and Krakenoid combine to fight Drago. Dreadeon and a lot of clones attack Boulderon, Trister and Wolfurio. Shun and Taylean the summon Silent Strike. Then Miserak, Deezal and Smasheon are summoned. Suddenly Slynix comes down from the sky and he defeats the other Mechtogan. Helios then reveals it to be his Mechtogan. Slynix defeats the Dreadeons. Then Helios takes out a couple. Then Venexus Titan shows up as well as more Dreadeons who create a portal to bring Mag Mel to Interspace. Then Helios and Drago mutate and battle the Chaos forces. They then use their combined power to close the portal. All of the Brawlers except for Dan and Spectra go back. Then more Dreadeons appear and Spectra sends Dan back. Helios, Spectra and Slynix take out the Dreadeons and then Interspace comes apart. Then a Dark Portal opens in the air. Then Razenoid evolves.
25 "Dark Moon" August 7, 2011
With Razenoid's Catharsis complete, Mag Mel decides to put all the humans into the dark reverse dimension of Earth to torture them. Meanwhile, the Dark Moon sends out energy waves which transfer all the non battlers to the reverse dimension. He also summons six different attributed Razen Titans to the six biggests cities on Earth to drill holes into the Earth's core which will result in the Earth blowing up. He then appears in the sky as a vision to all that he will do the same to all opposing forces including Gundalia, Neathia, Vestal, and New Vestroia. The Brawlers decide to split up and hunt down the Mechtogan Titans but this proves not to be simple as there are armies of Chaos Bakugan and Dreadeon Clones as protectors. The grand battle begins with the Brawlers summoning their Mechtogan, Dan with Rapilator and the addition of Drago, Zenthon, and Zenthon Titan defeating the first one, and Shun who summons Faser Titan and defeats another one. As the battle continues, Rafe with Wolfurio and Paige with Boulderon are having difficulty but then, the Vestal Destroyer arrives with Spectra Phantom, Infinity Helios and Gus Grav on the bridge. He then comes to assist them and they defeat another Razen Titan. After this, he with Dan and Shun then come together to face three more Razen Titans.

Spectra then suggests another mutation between Helios, Drago and Taylean. They accept this and form Mercury Dragonoid, Mutant Helios and Mutant Taylean. These mutants then defeat many Chaos Bakugan and they split apart. Then, Drago and Taylean merge again and deals some more damage to the Razen Titans. Mag Mel retaliates by not only summoning more Razen Titans but also arrives with the evolved Razenoid too. He then binds Dan and Drago in a knot and the Brawlers Mechtogan fight back. However, Razenoid proves to be too strong and manages to survive and defeat all of their Mechtogan. Spectra tells to Gus that send the data for the Bakugan Battle Suits over; Doomtronic for Helios and Blasterate for Taylean. The two manage to break Razenoid's shield and knock him back but he manages to survive and attacks everyone, including the Brawlers themselves. Mag Mel begins to taunt Dan and Marucho forms a small plan. Taylean and Helios then attack Razenoid while Trister reminds Dan and Drago about the gate and key which since they have, can possibly close the Dark Moon. Razenoid then blasts Trister who gets up later as Dan and Drago fly up to the moon after breaking free with Mag Mel and Razenoid coming from behind. The destiny of the Earth it's on the hands of Dan and Drago just as Spectra said.

26 "The Final Takedown" August 14, 2011
The final battle continues with Dan and Mag Mel, while the others are fighting the remaining Bakugan, Mechtogan, and Mechtogan Titans on Earth. Razenoid and Drago continue to fight and Drago is about to get hit, but Zenthon and Zenthon Titan come to protect Dan and Drago. Mag Mel and Razenoid then summon Dreadeon and Razen Titan (called Dreadeon Titan) and they continue to fight. Dan and Drago tell them that they should only be fighting them not the innocent but Mag Mel responds as it is an act of revenge and he doesn't care about nobility. On Earth, the drilling has gone to 70% and Spectra and Gus go attack. Shun summons Faser Titan to help while some fear there are too many. Marucho reassures them as Rafe and Paige continue to fight. Mag Mel begins to taunt Dan and he manages to get them to fall down. He tries to get Dreadeon and Razen Titan to kill them but Zenthon and Zenthon Titan defend them. However, the residual energy created from them caused an outburst of energy which not only destroys them but Razenoid absorbs it to become bigger and stronger.

With the drilling up to 85%, the battling continues with more Titans being destroyed. Dan and Drago, however, are not doing as well as Mag Mel tells them about the energy collected from Bakugan Interspace. Noah sees a vision of Anubias inspiring him to fight on and telling him how much he grown. Chris and Soon then hear Sellon's voice and run towards it. Dan and Drago then receive power from the gate and key while Razenoid blasts Drago. When the smoke clears, Titanium Dragonoid isn't there and is replaced by Fusion Dragonoid! Razenoid then tries to aim at Drago but he constantly misses. He fires at Razenoid which manages to destroy him and breaking the gate and key of them. Mag Mel is about to die but not before saying that Dan is still doomed. Mag Mel then disappears. On Earth, all the Chaos Bakugan, Mechtogan, and Mechtogan Titans disappear along with the Dark Moon. Everyone else returned confused as shimmering dust falls from the sky. They then believe that Dan and Drago sacrificed themselves but then in a glowing light, Dan and Drago appear. Everybody is happy and ask him what happened with Dylan walking away with his signature lollipop. They asked how was the battle and Dan responds with it being easy.

27 "Evil Arrival" September 10, 2011
A long time has passed since Mag Mel and Razenoid were defeated, and Earth, New Vestroia, Vestal, Gundalia, and Neathia were emptied of all the Chaos Bakugan. Everyone has returned home, including Spectra, Gus, Paige, Rafe, Taylean, and Trister. As soon as everything turned back to normal, Mira arrived and brought her advanced Vestal technology to aid Marucho and the Marukura Corp into making the Bakugan Research Center, which is now the Bakugan Battle Brawlers HQ. Now that the Interspace is gone, the Marukura Corp and the Vestal scientists were able to create a new home for brawling in replacement of Bakugan Interspace known as Bakugan City. Once word got out about this place, all Bakugan from New Vestroia partnered up with humans and are now living there. Shun and Marucho have new partners as well: Ventus Jaakor and Aquos Radizen, while Dan is still partnered with Drago, now evolved into Fusion Dragonoid. The three of them and their new rival, Gunz Lazar, a Haos battler partnered with Haos Reptak, are the semi-finalists in the current Bakugan tournament. After Gunz defeates Marucho and Shun loses to Dan in the semifinals, the final round commences. Dan and Gunz's battle is soon interrupted, however, by the arrival of four mysterious Mechtogan: Coredegon, Slycerak, Exostriker, and Mandibor, who have come from the Doom Dimension after killing their creator, Fury. The Mechtogan, declaring that their goal is to end all harmony between humans and Bakugan, begin to lay waste to the stadium. Gunz, Marucho, and Shun are quickly defeated, and while Drago does put up a fight for some time, the Mechtogan gain the upper hand once more by combining into Mechtavius Destroyer. Dan and Drago suddenly manage to summon a Mechtogan of their own, known as Dragonoid Destroyer, and they use it to defeat their enemies. Mechtavius Destroyer is split into its component parts, which are banished to the Doom Dimension again, swearing vengeance. As the Brawlers rejoice, a mysterious, masked figure with Gunz's hair is seen standing up from the rubble.
28 "Wiseman Cometh" September 17, 2011

Right after the battle between the Battle Brawlers and the Mechtogan, the Brawlers start looking for Gunz and run into Reptak, who is also looking for Gunz. After that, they go to the Bakugan Research Center in Bakugan City where Reptak explains his story to the Battle Brawlers. Their Bakugan don't believe him, while Mira says that it is a little unrealistic. Some time later, Mira shows Dan the data she was able to retrieve from his Bakumeter about the strange Mechtogan and Dragonoid Destroyer. The Brawlers then discover that Dragonoid Destroyer has two spaces on his shoulders to launch Bakugan during a battle.

Meanwhile, in the Doom Dimension, the Nonet Bakugan wonder if Coredegon and the Mechtogan were victorious against the Bakugan, and they decide to ask Worton, but he tells them to be patient. Then a human calling himself Wiseman appears to them and offers them their freedom in exchange for their help in summoning the four Mechtogan that attacked Bakugan City earlier. Then they head down to Bakugan City and immediately start wreaking havoc on the construction site. Julie would report what was going on at the construction site and told Dan to get down their with the other brawlers. When the Brawlers appear to battle, they got hammered by the Nonet Bakugan and Mechtogan until they summoned Dragonoid Destroyer and were about to unleash a jumping attack with Jaakor and Radizen until Mira told them that since Radizen is not a Sky Raider Bakugan, he cannot be used in a jumping attack and then found out that Reptak could be used because he is a Sky Raider Bakugan. So, Dan and Drago summoned Dragonoid Destroyer and then attached Reptak and Jaakor to Dragonoid Destroyer and they launched the jumping attack. Then Mira creates an Aquos Blasterate for Radizen and he and Marucho join the battle and easily repel the Nonet Bakugan and the Mechtogan. Wiseman, defeated, leaves the scene. Dan tries to go after him, but he disappears. The Brawlers wonder who he was, but Reptak says that the way that he launches Bakugan was similar to his missing partner Gunz

29 "Mysterious Bond" September 24, 2011
The episode starts when the brawlers discuss Wiseman and his Nonet Bakugan. At the middle of the discussion, Reptak leaves and he was really worried by his missing partner, Gunz. Now, Dan, Drago, and Reptak start to ask if the people of Bakugan City see Gunz, but no one was seen him. However, Reptak hear the voice of Gunz and he found him at the crowding people. They followed hm and then they go into the construction site where Wiseman was found. He challenges into a battle and he throw Betadron, Mutabrid, and Kodokor. Dan throws Drago and start the fight, but he loses in the first round. At the middle of the battle, Reptak questions if he was Gunz, but he challenges Dan to remove his mask on his own. Dan throws Reptak and fight with Drago, but they are still defeated. So Mira say to Dan to send battle suits to them and use Doomtronic and they defeat them easily. But Betadron along with his brothers unite and formed Gliderak. He defeated the Doomtronics Reptak and Drago use. Finally, they unite into Aeroblitz and defeat Gliderak. In the end, Reptak will go brawling with Dan.
30 "The Prodigal Bakugan" October 1, 2011

At the beginning of the episode it shows Shun and Jaakor traing together. After they are done Shun takes off whilst Orbeum and Skytruss make an appearance and ask Jaakor to go with them to New Vestroia so they could protect the Bakugan. Jaakor states that hhe needs time to meditate on this so they leave, Shun overhears their conversation and makes a decision to let Jaakor leave. Jaakor then has a conversation with Shun and they decide to part ways so that Jaakor can protect his family. Shun is soon confronted by Wiseman and his Bakugan Spatterix and Stronk. The two Bakugan fight Shun and Shun is able to hold his own for a while until they gain the upperhand. Jaakor is about to leave until he feels Shun is in trouble. Jaakor then aids Shun in battle and was able to take on Spatterix and Stronk. The two Bakugan then fuse together to create Scorpak and their combined power were able to take down the Jaakor and his students. Jaakor then asks Orbeum and Skytruss to fuse with him and they become Magmafury, with their combined power they defeat Scorpak forcing Wiseman to leave. Wiseman then remarks that he is learning more about the Brawlers each time he fights them. Orbeum and Skytruss then leave for New Vestroia to help protect the Bakugan there.

31 "Combination Impossible " October 8, 2011
After Shun tells his story about what happened in his battle with Wiseman, the other Bakugan pressure Radizen when he is going to be able to combine. Radizen has become upset because he is unable to have a combination, he is approached by Roxtor but ignores him. He is later taken by Marucho who tries to cheer him up. While on their way to the power plant Mira hides in the back of Marucho's air carrier to help Marucho and Raidzen patch things up. After listening she talks to Roxtor stating that she didn't have to come at all. Marucho and Raidzen are confronted by Wiseman and they battle against his Bakugan, Radizen is able to hold his own and beat the two, but when they combine he has a hard time. Radizen then fuses with Roxtor and is able to defeat them in battle.
32 "Enemy Allies " October 15, 2011
The episode begins with Kato checking that all the Brawlers are asleep except Mira who is working on Battle Suits for the Brawlers Bakugan. The next day Julie and a camera man arrive at the HQ for an interview report. She then asks Dan,Marucho and Shun questions about Wiseman. Mira then enters saying she has finished the Battle Suits but before finishing explaining about their Battle Suits she faints but Dan catches her. She later wakes up in front of the Brawlers, Dan says to rest and she gets upset, Kato then asks her to call him if she needs anything but she then stops him and asks him a favour. The Brawlers are then sitting down when Kato then tells Marucho that he is going to get Mira something and leaves in Marucho's ship. Between this time Wiseman and Betadron talk about re-summoning Coredegon and the others. They later appear in a park and Julie get's a call from her boss saying that Wiseman is back and she later hides in a bush whilst the Brawlers confront Wiseman. The Brawlers seem to be gaining the upper hand until the Nonet Bakugan generate enough energy to summon the Mechtogan to fight the Brawlers. They soon integrate into Mechtavius Destroyer and the Brawlers combine into Betakor and Magmafury but are defeated and Dan is knocked out. Kato is soon arriving with someone the Brawlers know well. Shun, Marucho, Reptak and Drago try and fail to wake up Dan but soon after a voice wakes him up Dan then realizes its Runo who Mira told Kato to go get because she knows Vestal Technology and sends the Battle Suits to the Brawlers. The Brawlers then gain the advantage and beat the Nonet Bakugan and Mechtavius Destroyer.
33 "Battle for Bakugan Land" October 22, 2011
The episode starts off with Dan showing Runo around the city, when they run into Julie who was looking for a scope. They all then decided to go to Bakugan Land, which is an amusement park in which the Bakugan dedicated to the humans as a thank you for being allowing them to live on Earth. Meanwhile, Marucho and Shun were talking about Dan and Runo. Wiseman shows up to ruin the park with Spatterix and Stronk. Julie decides to get the inside scoop from the villain himself on why he is causing destruction, but he doesn't answer her and decides to battle Dan. Runo would leave to send Drago and Reptak their Battle Suits, Shun and Marucho would see the battle on TV and go to help Dan. Wiseman's Bakugan would fuse to become Scorptak and keeps Drago and Reptak from fusing, Runo finally sends the Battle Suits which turns the tide of the battle in Dan's favor which allows his Bakugan to defeat Scorptak. Thanks to Julie the people began to trust the Bakugan again and Damdos regain his trust in humans.
34 "Gunz Blazing" October 29, 2011
The Brawlers have given up hope of seeing Gunz again, but one stormy day he appears. However, Dan suspects that Gunz is really Wiseman until he receives news of Wiseman being in the city. After they arrive, the Brawlers found out that was a hologram, while the real Wiseman electrifies Runo and Kato to steal three Battle Suits. Dan pursues Gunz and discovers he is really Wiseman, and a brawl between Reptak and Tremblar begins. Near the end, Drago and Dragonoid Destroyer defeat Tremblar while Wiseman escapes with the stolen Battle Suits. Back at headquarters, the Brawlers discuss if Gunz was brainwashed which made Reptak decide to fight in order to save his partner.
35 "Battle Suit Bash" November 5, 2011
After the Brawlers got used to the fact that Gunz was actually Wiseman, Mira was finally well enough to be discharged from the hospital but the bad news was Wiseman tricked them and stole some of the Battle Suits, however Defendtrix, Blasterate, and Doomtronic were the only ones left, now the pressure was on to get them back. Wiseman reappears with Betadron, Kodokor and Mutabrid with the stolen Battle Suits to battle Dan, Shun and Marucho. Meanwhile, Balista finds a secret door and ends up finding the real Gunz being unconscious and tangled in vines of some sort. Near the end, Dan and Wiseman have a personal fight to retrieve the stolen BakuMeter, but Wiseman and the Nonets retreat. Back to his volcano island, Wiseman reunites with Gunz and uses the vines to absorb his body's energy.
36 "Countdown to Doomsday" November 12, 2011
Wiseman finally decides to deploy the final stage of his plan, with the Nonet Bakugan more powerful after every battle, and with the stolen Battle Suits and the evil Mechtogan by their side, they are ready to face the Battle Brawlers. Meanwhile, the Battle Brawlers are analyzing the recollected data about the Nonet Bakugan, the evil Mechtogan, the stolen Battle Suits, and Wiseman himself, but they don't have enough information, so they decide to look for information from anyone they can ask. While they do this, Wiseman and the other Nonet Bakugan are getting ready for their battle against the Brawlers, but still they are not sure of trusting the evil Mechtogan. However, their leader, Betadron, doesn't really care of entrusting the evil Mechtogan, as long as he can destroy Drago, he will take any risk. After a long time searching, Skytruss and Orbeum locate Wiseman and alert the other Brawlers about him. When the two sides finally met, a great Bakugan battle engages using everything they got. Both sides are pushing themselves to the limit, but Wiseman and the Nonets summon the evil Mechtogan to help them destroy their enemy. The evil Mechtogan easily defeat the opposing Bakugan with a single blow, and when everything seems lost, they combine to form the deadly Mechtavius Destroyer. Seeing no choice, Dan decides to summon their ultimate battle machine, Dragonoid Destroyer, who quickly starts to battle against his "brother" with everything he has. Unfortunately, Dragonoid Destroyer isn't powerful enough to defeat Mechtavius Destroyer this time, so Mechtavius Destroyer focus all of his energy into a final blow and apparently defeats Dragonoid Destroyer, draining all his remaining energy. Before leaving, Mechtavius Destroyer makes a horrible proposal; the Brawlers must get rid of their partner Bakugan, if they do it before they return, only the Brawlers will be destroyed, but if they don't, the entire population of the Earth will be annihilated. After saying this, Mechtavius Destroyer vanishes alongside the Nonets and Wiseman, leaving the Brawlers in big trouble.
37 "The Eve of Extermination" November 19, 2011
After the Brawlers were defeated, in their HQ, Dan asks Mira if Dragonoid Destroyer is okay, Mira reveals that Dragonoid Destroyer has 70% of his energy not on reserve and the other 30% is on reserve, But Dan questions why Dragonoid Destroyer is not using full power as it probably would have defeated Mechtavius Destroyer. It is also revealed that he will be unable to battle for 18 hours. Dan becomes frustrated, knowing that the Brawlers can't succeed without him, which leads to a fierce argument between Dan, Marucho, and Shun, the latter two arguing that they can win without Dragonoid Destroyer. Runo then breaks up the fight. Later that night, Runo, Mira, and Kato comfort Dan, Marucho, and Shun, bringing the trio back together in the process. They head to a stadium where Wiseman meets them. Dan tells him that they are going to fight for the Bakugan's freedom, starting another battle between Wiseman and the Brawlers. The battle between the Brawlers and Wiseman goes smoothly until Wiseman dismisses the Nonets again and summons the evil Mechtogan, where the Brawlers tell their Bakugan to combine, a fierce battle begins as Betadron tells the Nonets to chant evil thoughts about destroying Drago, this powers up the Mechtogan. The Mechtogan then form Mechtavius Destroyer, however the Brawlers are unable to defeat them even with the combinations. Shun and Marucho try to defend from a powerful attack from Mechtavius Destroyer and fail. The Brawlers are on the edge of defeat. Suddenly, Dragonoid Destroyer uses 20% of his energy reserves to summon two new Mechtogan for Jaakor and Radizen: Thorak and Flytris. Dan and the others then begin to use a powerful combined ability and manages to break through Mechtavius Destroyer's shield. Thorak and Flytris combine into Duomechtra and give the Brawlers the advantage they needed to win the match. Shun tries to capture Wiseman as he flees, but to no avail. Mira later tells the Brawlers that Thorak and Flytris came from 20% of Dragonoid Destroyer's reserve energy, leaving Dan wondering what he'll use for the other 10% as the episode ends.
38 "Jump to Victory" November 26, 2011
Haos Aerogan continues his training in New Vestroia to jump high set by his mistress/master. However he yearns for more battling experience after continuously jumping higher since the beginning of training. Aerogan then sneaks off to Earth to find a potential battling partner so he can fight other Bakugan. Aerogan transports to Bakugan City but gets a less-than-welcome greeting from each of the Bakugan requesting for a battle. Aerogan is repeatedly buffeted and pinballed until he ends up making a soft landing into Runo's drink, who was relaxing in the park. Runo cleans Aerogan up and explains to him the current climate and how the Battle Brawlers are watching for any signs of Wiseman's movements. Aerogan is elated to hear that Runo is part of the Brawlers and is adamant to be her partner, despite Runo having given up brawling. However she does bring him back to the Brawlers' headquarters where the other Bakugan cites Aerogan's enthusiasm to join them but lacks the battling experience and its purpose. Dan leaves saying that Aerogan is now Runo's problem, much to her annoyance. Mira's analysis confirms Aerogan's high jumping prowess but Aerogan asks to train somewhere with Runo so she takes him to a place where Shun goes for his ninja training. Runo repeats her statement that she is not Aerogan's battling partner and that she and her former Guardian Bakugan, Tigrerra gave up battling on the front lines to protect their friends and family. As Aerogan begins jumping, Wiseman is revealed to have eavesdropped on the conversation, surprised that Runo was once a Battle Brawler. He later crashes the party and challenges Runo to a brawl with Balista and Worton. Dan however shows up, finding Runo and Aerogan through Runo's tracking signal from Mira. Drago states they came to apologize to Runo before Dan had a chance to say anything else, though he recovers from this by accepting Wiseman's challenge. Drago and Reptak had trouble getting through the combined Nonets' cyclone attack that prevents Dan from activating their abilities but never gave up the fight, revealing to Aerogan their determination to not lose and the true meaning of brawling. When Dan calls upon Dragonoid Destroyer Runo sends Aerogan into battle, using Dragonoid Destroyer to send Aerogan up into the air and strikes the Nonets from above the vortex. While the Nonets quickly recovered the Brawlers used the same tactic again and again and defeated the Nonets, forcing Wiseman to retreat. Even though he found the true reason for battling, Aerogan decides to return to New Vestroia and thanks Runo for being an 'awesome' partner. Later, Aerogan apologizes to his master/mistress for leaving New Vestroia without her permission. Aerogan's trainer is revealed to be none other than Runo's former partner, Tigrerra, who forgives him by saying that no doubt he has learnt much from Runo and the Battle Brawlers. Tigrerra wishes for her and the other brawlers luck and stay safe no matter what.
39 "Enemy Infiltration" December 3, 2011
The episode begins with Skytruss and Orbeum investigating on Wiseman's hideout, having been transported there by Shun when he threw them two episodes earlier. They then discover a secret room after wandering around for a while. Meanwhile, Wiseman reveals to the Nonets that the Mechtogan are now fully resurrected except for Coredegon; as Wiseman states he is saving him for last. As Skytruss and Orbeum send out a message to the Brawlers about Wiseman's hideout, Balista vows to find out Wiseman's true identity. Meanwhile, the Brawlers learn of Wiseman's hideout and they head there to take down Wiseman for good. Back at Wiseman's hideout, Skytruss and Orbeum face off against Stronk and Spatterix, but are eventually defeated and recovered by Dan, Marucho, and Shun. The Mechtogan except Coredegon appear and a huge battle ensues. Meanwhile, Balista tries to awaken Gunz from his prison, but is unsuccessful. Wiseman then appears and prepares to punish Balista for "putting his nose in other people's business". Balista demands Wiseman to reveal his true identity. Wiseman does so and presumably kills Balista in the process. Outside the cave, the Brawlers combine their Bakugan, in hopes of defeating the Mechtogan, but are overpowered and sent off a cliff. The episode then ends with Gunz finally awakening.
40 "Gunz Lives" December 10, 2011
Gunz has now finally woken up but he doesn't remember anything since his battle with Dan. Once he broke free from the vines, he went to find a way to escape from Wiseman's base. Wiseman and Worton were discussing if the Brawlers were still alive or not. After that, Worton asked Wiseman if he knew where Balista was, but he told him that he didn't know. Wiseman appeared before Gunz, revealed his face, and told Gunz how he was created from his jealousy of Dan. After that, he let Gunz look around to find Reptak. Meanwhile, Dan, Marucho, and Shun were in Kato's submarine after having fallen off a cliff. Reptak explained that Gunz was willing to fight Dan as a rookie, but when he lost, he got very mad, but Reptak encouraged him that no matter what, if they just train hard, they will win. Once his story was over, Mira announced that she made duplicates of the Battle Suits Wiseman stole. Once they were geared up and ready to fight, they headed off to the island. After Gunz took a drink of water on a fountain, he saw Reptak and called for him but they thought he is Wiseman, since Wiseman looks like Gunz. Wiseman then shows up out of nowhere and teleported Gunz to his base. Shocked by this, the Brawlers were enraged for Wiseman pretending to be Gunz. Wiseman then threw Spatterix, Stronk, and Worton, including the Battle Suits that he stole. Later on, he sends out Betadron, Kodokor, Mutabrid, and Tremblar. After a long battle, Wiseman had enough energy, and revealed his true identity, Coredegon. Coredegon then shot a wave that defeated all the Brawlers' Bakugan, and revealed that he was using the Nonets all this time, and his true plan was to take over the world.
41 "Evil Evolution" December 17, 2011
After Wiseman revealed himself to be Coredegon, Coredegon is about to blast Drago into oblivion but the Nonets come to the Brawlers' aid. They are, however, quickly defeated by Coredegon. The battle gets more fierce as Gunz learns from Wiseman/Coredegon that he copied Gunz's appearance by absobing his evil energy and reverting it. After that, the Nonets are told that he will give them two options, while transforming to his true Mechtogan form, they must choose to either return to the Doom Dimension or be buried alive. Meanwhile, in the battlefield, the Brawlers summon Flytris, Dragonoid Destroyer, and Thorak, as well as creating their combinations Aeroblitz, Magmafury, and Betakor, while the four rogue Mechtogan combine into the deadly Mechtavius Destroyer. The battle is fierce, but eventually, the Battle Brawlers and Dragonoid Destroyer lose. Mechtavius Destroyer reveals that he will not be satisfied if he destroys the Battle Brawlers now, so he chooses to extend their suffering by sending them to the Doom Dimension. In the cave, Betadron saves Gunz, who agrees to be the Nonets' battling partner, except for Worton, who chooses to return to the Doom Dimension. Gunz then puts on Wiseman's helmet and a flaming red energy covers his entire body and turns him into a new Wiseman. His red suit, according to Betadron, changed its color to reveal all his inner fire. They arrive to confront Mechtavius Destroyer just as Gunz sees the Brawlers being sent to the Doom Dimension by Mechtavius Destroyer, letting their fate unknown.
42 "Evil vs. Evil" December 31, 2011
The Brawlers are sent to the Doom Dimension. Gunz Lazar and the Nonets are angry with Mechtavius Destroyer for robbing them of their revenge against Drago. Mechtavius Destroyer then tells the Nonets that he will destroy them and absorb their powers for himself, and that they will become a part of him. He then takes them all down with ease. Gunz then grabs the Nonets and runs off with them into the woods. Meanwhile, in the Doom Dimension, the Brawlers are clueless as to how to escape. Reptak then tells the Brawlers he is sure that Red Wiseman was the real Gunz. Dan later suggests that Drago try to teleport out of the Doom Dimension like before. Drago tries but fails, leaving the Brawlers realizing that they are in serious trouble. Gunz and the Nonets are plotting to fight Mechtavius Destroyer and take him down for good. Stronk suggests that he and Spatterix combine but Spatterix does not want to as he does not like to combine with Stronk. They leave the woods and find Mechtavius Destroyer who fires at them. Gunz throws out Spatterix who tries to hold back the blast but is not powerful enough. Gunz then throws out Stronk who combines with Spatterix to form Scorptak and proceeds to attack Mechtavius Destroyer. Gunz then throws out Betadron, Kodokor, and Mutabrid who plan on combining as well but are shot down by Mechtavius Destroyer before they have the chance. The Darkus Nonets prepare to combine a second time but Mutabrid is shot point-blank by Mechtavius Destroyer and is weakened greatly. Despite this, he still insists on combining but he is once again shot by Mechtavius Destroyer. Mutabrid then apologizes to his brothers and dies and is then absorbed by Mechtavius Destroyer. Gunz then throws out Tremblar. Enraged, the Nonets attack Mechtavius Destroyer all at once and momentarily destroys his shield. However, before they can attack again, the shield forms back. Tremblar, in combat mode, attacks Mechtavius Destroyer who shoots down and destroys the separated part of his body and then kills Tremblar, absorbing him as well. With the Nonets losing, Spatterix tells Gunz and Betadron to get out and go to the Doom Dimension so that they may face the Brawlers. Betadron, hesitant at first, agrees and takes Gunz with him. Kodokor then sacrifices himself so that Scorptak can take Mechtavius Destroyer down in the blast. However, his plan fails and Mechtavius Destroyer separates Spatterix and Stronk. On the verge of defeat, Spatterix tells Stronk that they need to combine again. Stronk tells Spatterix that he thought Spatterix did not like combining with him but Spatterix admits that he took back what he said before and that Stronk was the best partner he ever had. They are both then killed by Mechtavius Destroyer who absorbs their power and grows to a gigantic size. Back in the Doom Dimension, the Brawlers are still trapped when they hear Gunz's voice. They then see Gunz and Betadron, who tell them that they have come to finally have their vengeance.
43 "Doom Dimension Throwdown" January 7, 2012
The episode starts on Julie's report on how people love Bakugan and Bakugan City and met Damdos again and he helped a girl get a balloon, showing his continuing kindness to humans. Meanwhile, the problem goes worse with the Brawlers in the Doom Dimension, not just on how to escape, but also Betadron and Gunz going into the Doom Dimension and challenging Dan Kuso and Drago in a battle. Betadron was still obsessed with taking down Drago and Gunz has revenge to Dan because of his partner, Reptak, was now battling with Dan. Dan tries to convince Gunz that Coredegon had deceived them, but the later refuses to believe it. After an intense battle, Dan and Drago emerge victorious, and Gunz decides to put his old life behind him and start anew with Reptak, discarding his identity as Wiseman 2.0. Betadron also joins the Brawlers. Worton then appears and informs them that Mechtavius Destroyer must be stopped before it's too late. Just then, Mechtavius Destroyer goes into Bakugan City and destroys it, leaving nothing but a crater, and Worton senses it.
44 "Blast From the Past" January 7, 2012
After Mechtavius Destroyer destroyed Bakugan City with his full powers, he goes to New Vestroia to destroy all the Bakugan there, but his plan was interrupted by the Brawlers' Bakugan from past seasons. They tried to defeat Mechtavius Destroyer, but they are defeated because of his strong power. Back in the Doom Dimension, Worton tells the Brawlers about the Current of Time, which he discovered by himself when he goes back into time and tells Balista to untell Wiseman the secrets about him in attempt to save his life. After, the Brawlers go into the Current of Time to get out of the Doom Dimension. As the current is about to get very strong, the Brawlers' memories was seen including Betadron who sees the fate of the Nonets when they were crushed by the Mechtavius Destroyer. Also, the Brawlers have seen the destruction of Bakugan City and New Vestroia and seem that he wiil also destroy Vestal, Gundalia and Neathia. After that, Worton and Betadron sacrificed themselves so that the Brawlers go to the Mechtavius Destroyer for the final battle. Successfully getting out of the Doom Dimension, the Brawlers told Mechtavius Destoyer that he will be defeated this time, and the final battle begins!
45 "Beginning of the End" January 7, 2012
With help from Worton and Betadron, the Brawlers travel back in time to stop Mechtavius Destroyer from destroying Bakugan City and New Vestroia. Mira and Julie decide to go help them out, but Runo stays behind to send the Battle Suits to the Brawlers. The Brawlers use Bakugan Combinations to counter Mechtavius Destroyer, but are easily defeated. Shun and Marucho summon Flytris and Thorak for help, while Dan summons Dragonoid Destroyer. However, Dragonoid Destroyer only fights at 90% of his energy, stating that "Not everyone is here yet". Mechtavius Destroyer then uses his powers to destroy Volcano Island, the location that had once been the hideout for the now-disbanded Nonets. Gunz considers giving Reptak to Dan due to his lack of knowledge of Bakugan Combinations, Battle Suits, Mechtogan, and Mechtogan Destroyers, but Reptak firmly states that they are partners 'til the end. Mechtavius Destroyer then fires a strong blast at Gunz and Reptak, but at that same moment, Reptak spawns a Mechtogan: Chromopod! Dragonoid Destroyer then announces that everyone is here.
46 "End of the Line" January 26, 2012
Gunz and Reptak have created a new Mechtogan, Chromopod. Upon his arrival, Dragonoid Destroyer begins to use 100% of his power. He soon goes through a "metamorphosis" that turns him golden and enormous. It is revealed that his infinite power comes from the bond between Bakugan and humans all over the world. With a single blast, Dragonoid Destroyer destroys Mechtavius Destroyer for good. Dan and Drago then meet the original Dragonoid, Genesis Dragonoid, who congratulates them on their victory. He had been using Dragonoid Destroyer as a vessel to speak to them. He tells them that is proud of Dan, Drago, and the other humans for getting along so well with the Bakugan and being able to spawn Mechtogan. He explains a little more about Fury and the Nonets whom he banished to the Doom Dimension, and how he had never suspected that Nonets' hate would grow so strong that they would be able to escape. Meanwhile, one more brawl still remains left undecided. The final match of the Neo Bakugan City Tournament is finally under way. Gunz and Reptak fight their hardest against Dan and Drago, but despite putting up a good fight, Dan and Drago defeat them, and remain as the champions. To celebrate his victory, Dan's friends throw him a party, but soon discover Dan is missing. Shun sees Dan and Drago sailing off using a boat borrowed from Kato. Dan says that another adventure is waiting for him and Drago, and that he had enough time in the spotlight, such that he wants to let other Brawlers to rise to his rank.