It has been one year since the events in Gundalia, and Bakugan Interspace has grown greatly. Marucho has teamed up with a Bakugan from Gundalia, Tristar, while Shun's partner is Taylean, a Bakugan from Neathia. After winning a battle, Dan and Drago learn that there have been two groups of battlers, Team Sellon and Team Anubias who have risen to high ranks not far behind Dan

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

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

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

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

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 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

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

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

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

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

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

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

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

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

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

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

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 are 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 from proceeding

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 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

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. Dan agrees to trust her, but Shun was suspicious thinking it was a trick. While the Brawlers fend off an attack, Sellon asks Dan to see her personally and when he did she attacked him and Drago and stole his Key

Anubias kidnaps Noah in order to get Dan to battle 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

The Brawlers agree that Dan should use his link with Mag Mel in order to escape. Meanwhile, Chris and Soon try to escape the Chaos Bakugan with the help of Team Anubias. Dan successfully uses his link to connect with Mag Mel and they battle

Marucho reveals his plan to completely delete Bakugan Interspace while his father and Kato work on an escape plan. The Brawlers round up the remaining battlers in Interspace and prepare to leave Interspace when a hoard of Chaos Bakugan suddenly appear. The Brawlers remain behind as the others escape when a mysterious Mechtogan appears and takes out the Chaos Bakugan

Dan and the others have arrived safely on Earth to find a mysterious dark moon in the sky and all the people missing, having been imprisoned in the dark reverse dimension of Earth. Mag Mel sends Mechtogan Titans of five different attributes to destroy the Earth's core and in the process, destroy Earth with the resulting explosion destroying New Vestroia, Vestal, Neathia and Gundalia in the process. Everyone splits up in order to take out the Titans when all of a sudden Spectra and Gus show appear to help, Spectra having somehow been able to escape Bakugan Interspace at the last minute

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

After defeating the Mechtogan that appeared in Bakugan City, temporary peace arrives. The peace is not meant to last long though as a new danger known as Wiseman arrives. Armed with his Nonet Bakugan (evil Bakugan he has released from the Doom Dimension), Wiseman hopes to destroy all peace that exists between humans and Bakugan

Reptak struggles to get over the disappearance of Gunz while working with Dan and Drago, but everytime he sees Wiseman launch a Bakugan Reptak can't help but think of Gunz's launching style. Will Reptak turn against the team, or can Dan and Drago help him stay on the side of light against Wiseman and his evil Bakugan?

At the beginning of the episode it shows Shun and Jaakor training together. After they are done Shun takes off while Orbeum and Skytruss make an appearance and ask Jaakor to go with them to New Vestoria so that they could protect the Bakugan. Jaakor states that he needs time to meditate on this so they leave, Shun overhears the conversation and makes a decision to let Jaakor leave

After Shun tells his story about what happened in his battle with Wiseman, the other Bakugan pressures Raidizen 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 to a water plant his family owns

Mira has been working very hard, using Vestal Technology to create some new Bakugan Battle Suits for Drago, Reptak, Radizen, and Jaakor but before they could test them out Mira collapsed of exhaustion due to her working so hard mean while julie wants to interview the brawlers and video time the whole seen mira is rushed to the hopisital. where she must stay for a week so kato ask if she needs any thing mira ask and kato leaves to run a favor. When Wiseman arrives trouble starts julie get a call that wisman is attacking they quickly act

Wiseman reappears and attacks the amusement park that Bakugan helped create Bakugan Land. Julie decides to go and confront him as a reporter to see what his problem is, and the Battle Brawlers must try and find a way to contain the Nomads powers once again