ข้อมูลอนิเมะBakugan: Gundalian Invaders

It's an all new adventure for the Bakugan Battle Brawlers when Dan's family moves to Bayview City and Marucho's Bakugan Interspace becomes fully operational to everyone, allowing kids all over the world to log on and display their battling skills. Dan heads to a cafe in town where Julie works to meet with his new friend Jake, a young brawler who is new to the game. The two make there way to Bakugan Interspace where they meet up with Marucho who gives Jake Subterra Coredem. Dan and Jake immediately want to battle, but discover that all the available arenas are occupied. They eventually meet up with Ren and Shun, who is locked in battle with Shuji. With Shun quickly seizing victory, Ren is scheduled to battle Dan next. As the battle intensifies, Marucho is forced to shut down Bakugan Interspace and Dan is knocked out cold. Before coming to, Dan has a vision of Bakugan at war each other, something which everyone, except Ren, brushes off as a hallucination.

On the distant planet Gundalia, the Twelve Orders discuss the explosion caused by Ren and Dan's battle in Bakugan Interspace. Kazarina, the head of the Bakugan Biology Research lab, is unable to identify the strong powerful Bakugan that caused the explosion. So, Emperor Barodius orders that this bakugan be brought to them before it joins their enemy. Back on Earth, Jake and Julie still believe that what Dan saw was a dream, though he is still convinced that it was real. Just then, Marucho calls and everyone heads to Bakugan Interspace, where Ren confesses that he is a humanoid alien being from Gundalia looking for strong battlers to help fend of the invading Neathians. Though hesitant, the Brawlers accept and track down two moles identified by Ren, Sid Arcale and Lena Isis and a battle ensues. Though Sid and Lena gain the upperhand, Dan pulls through with Jetkor and wins the battle. Everyone congratulates Dan on the victory. However, there may be more to Ren than meets the eye.

As Ren identifies three more Neathian moles (Mason Brown, Jesse Glenn, and Zenet Surrow), Princess Fabia from Neathia arrives in Bakugan Interspace looking for the recipients of the message she sent. Dan, having slept in, rushes to Bakugan Interspace and runs into Fabia, literally. Fabia learns that he is the top brawler in Bakugan Interspace, but before she can ask about her message, Dan rushes off to meet his friends. He tells them about the girl and Ren suspects she may be a Neathian spy. Before they can track her, Fabia arrives and is shocked to find that Ren, a Gundalian has gained their trust first! Now that Dan has sided with the Gundalians, Fabia claims they are her enemy and a battle ensues between her and Dan. Dan quickly takes the lead but falters when Fabia summons Haos Aranaut, the original Aranaut from which the clone Aranaut, Coredom, Hawktor and Akwimos originated, meaning Fabia sent the Phantom Data. This also means that it came from their enemies, the Neathians, something that Shun is not so sure of anymore. Defeated, Fabia leaves and wonders what to do now that Dan has sided with the Gundalians. While the others congratulate Dan on his victory, Shun disappears to ask Fabia what her side of the story is.

Dan gives Jake a practice match, but Jake feels he is not ready to become an official Bakugan Battle Brawler. When another mole, Mason Brown, is located, Dan challenges him to a battle, but Jake steps in and wants to prove himself. Due to his inexperience, Jake quickly loses and feels he has failed Dan in proving himself. The next day, Jake is still upset over his loss, so Julie, being a Subterra master, offers to help him discover his own battling style. Jake returns for a rematch with Mason while being greeted by a bitter crowd. With his newfound confidence, Jake easily defeats Mason. Before the Brawlers can pursue Mason, he teleports out of the stadium. Dan congratulates Jake, who becomes an official Battle Brawler.

With the Neathian moles making themselves known, they begin kidnapping brawlers from Bakugan Interspace. The puzzling part is that each brawler is eventually returned to BI. Meanwhile, Sid and Zenet find their recruiting hard when Marucho puts out an announcement to everyone not to battle Sid, Lena, Mason, Jesse and Zenet. In retaliation, Sid and Zenet challenge Dan and Ren to a battle. Ren is quickly taken out, leaving Dan to fend for himself. Being outnumbered, Dan loses but Sid allows him to keep Drago. After the battle, Gill of the Twelve Orders orders Sid to not engage the brawlers and to leave it to Ren, who states their plan is working perfectly.

Fabia tells Shun her side of the story, which he believes while he worries that the others have made a big mistake. While Marucho and Ren work hard on an expansion for Bakugan Interspace Jesse Glenn arrives. Dan heads to the new arena to challenge him but is stopped by Fabia, who claims that Jesse is not who he claims to be. Fabia steps in to fight Jesse, something that greatly confuses Dan and the others since they all think that both Jessie and Fabia are Neathians. Ren insists that they do not cheer for either of them and they should just let their enemies destroy each other. Despite this, Dan, Jake and Marucho cheer for Fabia. Although she puts up a good fight, Fabia loses due to a bug in the field, causing her to cry over her loss. Shun explains that the only person who could plant an unlikely bug that caused Fabia's defeat was someone familiar with the BI System, someone like Ren. Ren denies everything while Jesse flees. Fabia and Shun expose Ren for lying about how Neathia attacked Gundalia, causing him to run away. Marucho, however, refuses to believe these accusations and rushed off to find Ren.

Marucho frantically searches Bakugan Interspace and his home for Ren, but comes up with nothing. Meanwhile, Ren meets up with Sid, Lena, Mason, Jesse and Zenet, scolding Jesse for giving away his cover. Marucho uses a secret message to get Ren to meet him and they battle. Meanwhile, Fabia tells everyone her side of the story. Neathia was attacked by Gundalia and, due to their bakugan's inexperience in battle, they quickly lost to the Gundalian Bakugan. Fabia then sent out a distress message via the Phantom Data which lead her to BI on Earth. Shun discovers the battle going on between Marucho and Ren. When they arrive, Marucho defeats Ren. Ren attempts to get Marucho to switch sides, but he refuses to leave his friends. Ren declares their friendship over and reveals his true Gundalian form and tells Marucho that the next time they meet, they will be enemies.

After the battle with Ren, Marucho is refreshed and even constructs a speech program for the clone Akwimos. Fabia worries that Dan and the others do not fully trust her as they were easily tricked by Ren. Dan assures her that they completely trust her after seeing how angry she got about Bakugan being used for war. Relieved, Fabia gives Shun, Marucho and Jake the real Hawktor, Akwimos and Coredem. Meanwhile, Ren leads the other Gundalians to kidnapped two brawlers named Taylor and Casey. The two are taken back to Gundalia where they are brainwashed into fighting against the Neathians. Dan and the others confront Ren who sends Taylor and Casey to attack them. Dan and Shun battle Mason and Taylor while Marucho and Jake battle Sid and Casey. Fabia, however, sneaks off in hopes for finding Ren to discover his plans. After winning their respective battles and freeing Taylor and Casey from the Gundalians' control, they are all forced out of BI. Ren reveals that he is now in sole control of BI.

Dan and the others have been forced out of Bakugan Interspace and Ren has taken control! However it seems that they were the only ones kicked out as other kids continue to log on, not knowing what is going on. To make things easier, Marucho, Shun and Fabia head over to Dan in Bayview City aboard his giant airship. Dan tries to enter Bakugan Interspace, but is rejected. He tries to tell the other kids about the danger, but none of them believe him. Marucho is unable to shut it down as Ren has complete control, so Jake tries brute force, which actually works. Marucho takes them to a remote access room so they can plan their next move. Fabia remembers that the Neathian Bakugan can body shift themselves into Interspace. Dan immediately wants to go, but Drago reminds him he does not have that same power. So Jake volunteers and brings Dan along using Coredem's power. Dan and Jake witness brainwashed kids take back more kids back to Gundalia. The same two brawlers who accused Dan of lying reappear, now brainwashed by Gundalia, and battle Dan and Jake. They easily secure victory as well as the opponent Bakugan. The two boys are released from Gundalian control and Dan and Jake take them out of Bakugan Interspace. Dan vows to rescue all the brainwashed children.