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Private Notes
The story begins with a young boy named Dan who has never lost a Bakugan match. While in a match against a bully Dan sees a vision of two Bakugan brawling. Is there more to the game than what the players think?
A mysterious Bakugan player named Masquerade, who is ranked at #1 on the list of Bakugan players, is stealing Bakugan from players worldwide. Dan makes an open challenge to Masquerade, and loses two of his Bakugan to this mysterious player, thanks to a Doom Card, which makes a Bakugan disappear forever. Dan is lucky enough to not lose Drago, but might if he loses to Masquerade again.
Masquerade teams up with a player with Rikimaru, by giving him a very special Bakugan. When Rikimaru and Dan battle, Drago ends up using a dangerous move to save himself and win the battle. Dan gets angry, and throws Drago into a river, cursing the day they met.
Dan has a hard time adjusting to life without Drago. He ends up causing a schoolmate named Ryo to drop his computer and runs away, hurting Ryo's feelings. Masquerade takes advantage of Ryo's hurt feelings, and Ryo beats Dan in a battle. Dan finds Drago, and tries to make up with Ryo.
Dan and Runo meet for the first time, outside of the Bakugan website, and realize that they live in the same town. Dan drops his BakuPod, and Runo picks it up, noticing that Dan has battled Masquerade. She goes in his place, but ends up battling a boy named Tatsuya.
While at an amusement park, Dan and Runo are invited onstage to assist a magician act by two brothers. Dan picks a card, and realizes it's a Doom Card. The brothers are working for Masquerade, and Dan and Runo get tricked into a battle.
Marucho reveals that he secretly moved to Dan's neighborhood, and throws an elaborate welcome party. Masquerade makes a business offer with the famous pop band duo, Jenny and Jewels. The duo crash the welcome party, and challenge the Battle Brawlers.
Dan and Marucho fight against the pop star duo, Jenny & Jewels. After a narrow victory, Drago tells the Brawlers about how the Bakugan came to Earth, and how a human entered the Bakugan world of Vestroia.
Masquerade manipulates two boys, Kosuke and Takashi, into using his Doom Cards against the Bakugan Battle Brawlers. He promises that he'll reunite their friend Ai with her brother if they help him. Wanting to help their friend, they take the bait and soon run into Runo and Marucho, who are at the airport to pick up their website friend, Alice. Luckilly, Alice is skilled in the finer points of combination battle, and coaches her friends to victory. Alice has a secret, however, that might just ruin her friendship with the Brawlers.
Julie and her childhood friend, Billy, go one-on-one in a Bakugan battle. Although Julie's defeated by Billy, she's impressed with his skills and his Bakugan, "Cycloid." They make a great team, and Julie wishes she could befriend a talking Bakugan. Later, when Julie admits to herself how lonely she really is, the Bakugan Gorem appears. The two seem to be destined for each other.
Marucho and Runo realize that the combined powers of the Bakugan Brawlers are not enough to defeat Masquerade. Without Dan's knowledge, they visit Shun to try and get him to join. Shun's grandfather tries to get them to leave, but Shun makes a deal. If they win, he joins. If they lose, he'll walk away.
Alice realizes that she may have a connection with the mysterious Hal-G, but doesn't have the courage to tell the other Brawlers. Meanwhile, Dan recalls the last battle he had with Shun. Shun's mother gives Shun a Bakugan, "Skyress", to watch over him.
Masquerade has been destroying the Bakugans of kids all over the world, and the Brawlers have to put a stop to it. Reluctantly, Dan accompanies Runo and Marucho to Shun's house to recruit him one more, but find out he's joining Masquerade! Dan accepts the challenge of battle, and with Drago, fights against Shun and Masquerade.
Lured by an invitation to celebrate their world class rankings, five of the top ten Bakugan players gather at a mysterious mansion. There they meet Masquerade & the evil Bakugan "Naga". They're put under a spell to take Dan & the other Battle Brawlers out of the picture. Meanwhile, Alice confesses that she believes that her grandfather Michael is responsible for the destruction of Vestroia. They decide to take a look around Michael's lab to find evidence of what happened to him.
The Brawlers finally meet Julie up close and personal, but the mood goes from happy to sad when they see what's happening in Vestroia. Julie and Shun fight with Julie's friend Billy, the 9th ranked Bakugan player, and her neighbor Komba, the 5th ranked Bakugan player, knowing they were tricked by Masquerade to take out Dan and the rest of the Brawlers.
Julie is still upset about Billy's betrayal, but tries to put it behind her so she can support the other brawlers. Meanwhile, Shun tells them about a valley similar to Bakugan Valley. Everyone heads there but on the way it is revealed that Shun lied about it being similar, and it was all a ploy to try and see why Masquerade always knows where they are all the time. He tells them that there has to be someone spying on them. At the valley, the 3rd best Brawler Chan Lee appears and challenges Dan to a brawl.
The Brawlers are having trouble finding the Infinity Core. When they learn that their location might be being broadcasted, they shut off their signal.
When Marucho loses his Bakugan to Klaus, he and Runo give chase, and wind up in Masquerade's castle!
After a quarrel between the Brawlers, they all go separate ways. Julie decides to pursue her friend Billy and try to save him from Masquerade's evil ways.
When Shun leaves the group, Alice chases after him. Meanwhile Dan goes to take on Masquerade alone.
Klaus, Chan-Lee, and Julio return to finish off the Brawlers. Dan, Runo, and Marucho take them on, but what will happen when Klaus uses Marucho's stolen Bakugan?
The Brawlers have been pushed back, but will the return of Preyas and the evolution of Drago be enough to bring them to victory?
Learning that Webmaster Joe is at the hospital, Dan and the other head there. However, while heading for Joe's room, Drago gets lost.
Alice helps a little boy defeat his biggest rival.
Tensions form between the group of Brawlers when it is believed that one of them is a double agent.
The Brawlers head to face Masquerade in one final battle.
The Battle Brawlers learn through Webmaster Joe (who was on a trip with his mother) that Masqerade has defeated the World's Top Bakugan players, so they try to come up with a strategy to beat him. The strategy seems to backfire when Masquerade visits Dan's house and gets him to accept a battle. Now the evolved Drago and the evolved Hydranoid will go head-to-head with the loser getting a one-way trip to the Doom Dimension, which is later revealed to be full of Bakugan turned into stone.
The Brawlers mourn over the loss of Dan and Drago. Meanwhile, Shun gets a challenge from Masquerade and decides to join Dan in the Doom Dimension. When Skyress learns of this plan, she tries to gather the other Bakugan and try to save Vestroia without putting their human partners in risk. Soon, the other Brawlers catch onto his plan and decide to join him, but first Runo makes a promise to Dan's mom - he's safe and will be home soon.
In the Doom Dimension, the Legendary Ancient Warriors of Vestroia prepare to test the powers of the Brawlers, seeing if they are worthy enough to save Vestroia. The Brawlers are separated and Julie is left with Gorem to face the Subterra Warrior, Clayf, and a shadow of her perfect sister, Daisy. With help from Gorem, Julie learns that she isn't her sister and she can only do the best she can do. Because of this, Gorem evolves into Subterra Hammer Gorem, and defeats Clayf.
Marucho must battle the Aquos Elemental Warrior, Frosch, and he is forced to send in Preyus early when he learns he is battling a shadow of himself. Preyus isn't feeling well throughout the battle, but he is able to give Marucho guidance to accepting his past. Marucho knew that he only did what his parents told him to make them happy, but he didn't like to always be so obidient. This causes Marucho to hate his old self. By accepting the past him, Marucho was able to help Preyus' digestion problem. This allows Preyus to evolve by spitting out his brothers: Aquos Angelo/Aquos Diablo Preyus. Will the combined strength of these brothers prove to be enough to defeat the Aquos Warrior?
Shun is stuck with the female Ventus Lord, Oberus, who has summoned a child that looks like Shun's mom to battle. The child convinces Shun to play with her while the sun is still setting, which it never does. Shun must battle himself as well when he is forced to choose between going back or staying in this world with his mother. In the battle with Oberus, Shun believes that he doesn't need his friends. His belief causes Skyress to die after a great impact with Oberus. When Shun realises his mistake, a tear drops down onto Skyress' ability card, changing it, and miraclesly reviving Skyress, which evolved into Storm Skyress. In the end, when Shun chooses to return to his world, Skyress evolves to Ventus Storm Skyress.
Runo and Tigrerra must battle a young boy from Runo's past (a smaller version of Dan) summoned by The Haos lord, Lars Lion. The test is for Runo to realize how much she truly treasures her and Dan's friendship/love. When Tigrerra is getting hit by Lars Lion's piercing arrows of light, Runo realises the friendship/love that she treasures and says "We are Friends Forever Dan!" in the English dub, while she says "I love you Dan!" in the Japanese Version. When Runo realizes this, Tigrerra evolves into Haos Blade Tigrerra.
Dan must battle the Pyrus Lord, Apollonier, in order for him and his friends to return to their world. He and Drago soon find out that they're battling a clown. Dan manages to win the battle, but Drago doesn't evolve. When Dan rips off the clown's mask, it turns out to be Runo. In order for Drago to evolve and Dan to past his test, he must battle, and win, against each of the Brawlers.
Joe is determined to find out where his friends have gone, so he challenges Masquerade to a battle. At first Joe appears to be outmatched, but Wyvern returns to give Joe assistance. The Brawlers also return, and Masquerade realizes his battle is only beginning. Dan explains everything about the Bakugan to his mother, who believes him and asks Drago to take care of him. Naga is revealed as one of the most dangerous Bakugan in the world.
Dan tells Shun, Julie, and Marucho that he has yet to pass the test in the Doom Dimension and the only way to have Drago evolve he has to defeat his friends one by one. Julie first battles Dan and Dan wins. Then, he battles Marucho and wins again. Shun says he will battle Dan the next morning. Masquerade is in the Doom Dimension and is about to start a battle with Alice.
Dan's final test is to beat his friends so his Dragonoid can evolve to the next level and become the Ultimate Bakugan. Dan battles Runo and Shun while Masquerade goes to see the Darkus Lord, Exeedra, and he ends up fighting Alice as a mirage.
Joe shows up after Dan defeats Julie, Marucho, and Runo for Wyvern to check out Drago's battling skills when Dan and Shun have their battle to finish Dan's test. Meanwhile, the Darkus Lord and Masquerade finish their battle. In the end Drago beats Skyress and becomes the Pyrus Ultimate Dragonoid, and Duel Hydranoid beats the Darkus Lord and evolves into the Darkus Alpha Hydranoid.
Alice appears to be disappearing all the time. Dan goes to talk with Marucho, Runo, Shun, and Julie and ends up finding Alice! Alice won't explain anything and leaves. Later, Joe receives a message from Masquerade, and Dan decides he'll take over to fight Masquerade with Drago to end it once and for all with Masquerade. Dan wins and offers Masquerade to join the Battle Brawlers to help defeat Naga. But Masquerade refuses and takes off his mask. It is revealed that Alice was Masquerade the whole time!
Hal-G appears to explain the origin of Alice and Masquerade. Because she is unable to forgive herself, Alice then disappears. Meanwhile a huge hole opens up in the ocean and weird weather has been happening all throughout the earth. Through much convincing, the Brawlers convince their parents about the Bakugan. What will they find in the decaying Vestroia? Dan and the Brawlers decide to take a little road trip, to Vestroia!
Alice tells Klaus about what she did as Masquerade, and gets pulled into a battle to punish her for sending his Bakugan to the Doom Dimension while she had been Masquerade. However, Klaus was just trying to teach her a lesson, that everyone, and everything must work together in order to create harmony.
The Bakugan Battle Brawlers enter Vestroia and realize Vestroia has become a hybrid world where two elements are mixed together to make one element together. They enter the Ventus and Aquos world where they meet Tayghen and Hairadee: two Bakugan of both Ventus and Aquos elements. As they fight, they suddenly see the portal to the next hybrid world of Vestroia is closing and so they agree that Shun and Marucho are to stay in the Ventus and Aquos world to defeat the two Bakugan. The rest of the Bakugan team disappear through the portal into another dimension of Vestroia.
As the remaining Brawlers enter the hybrid world of Subterra and Haos, a pair of Subterra/Haos Bakugan sisters named Rabeeder and Tricloid fall in love with Dan. The sisters say the only way out is if they beat them in a race. Dan and Drago win and leave to the next world.
Dan and Drago enter the hybrid world of Pyrus and Darkus where the dark army is running rampant. Dan and Drago are saved from Pyrus/Darkus hybrid Bakugans Centorrior and Druman by Nobilion: a Pyrus Tigrerra who is the oldest and wisest of all Bakugan. Nobilion explains how the negative energy has been influencing all of Vestroia, except those who can hide. Nobilion also mentioned that the Negative Energy has also created the evil hybrid Bakugan. Upon running into Centorrior and Druman again, Drago and Nobilion end up engaging them in battle. With Nobilion's sacrifice, Dan and Drago try to defeat Centorrior and Druman.
Alice arrives in Vestroia as Masquerade in order to help her friends. Masquerade finds Dan and he begins to help the weakened Dan and Drago. Centorrior and Druman though are able to counter sound judgment and all the power-ups that their Bakugan are given. Dan and Masquerade must work togerther to defeat Centorrior and Druman alongside an army of Serpenoids and Gargonoids. With Masquerade and Hydranoid using a cut and run trick, Dan and Drago lure them to the right spot where Hydranoid's attack manages to defeat Centorrior. Drago then uses his attack to defeat Druman. Masquerade then fades away encouraging Alice to continue on being a Bakugan Brawler and Alice obtains Hydranoid in the process. When the Brawlers reunite with each other, Centorrior and Druman watch from afar and stated that they are together just as Naga planned it to be.
The Battle Brawlers have managed to unite each element together, and they are given the blessing as the six new warriors. Hal-G and Naga are still causing chaos over Vestroia though, and now they are attacking Earth with the help of the hybrid Bakugan (Taygen, Hairadee, Rabeeder, Tricloid, Centorrior, and Druman) leading their Bakugan armies. The Brawlers must figure out how to save both worlds. Help is on the way though. Chan Lee, Billy Gilbert, Komba O'Charlie, Julio Santana, and Klaus Von Hertzon lead every Bakugan players of the world when they have decided to give assistance. Once Naga starts attacking with negative energy, his minions get charged up to turn the tables against the Bakugan players. Joe contacts the Brawlers that Naga in the real world. Drago senses Wayvern is in trouble when he sends his minions to find the Infinity Core, so the Brawlers head back to take on Naga.
Wayvern puts up an energy shield around Wardington powered by the Infinity Core to hold off Naga and his troops. Meanwhile the Brawlers return and join in the battle to protect all of Earth and defeat Naga before he can join the two cores together. Failure means that both worlds will be destroyed. Jenny, Jewels, and Marucho protect the city via sea, where the Ventus/Aquos hybrid Tayghen has been creating tsunamis. The singing of Jenny and Jewels gets Bordington's fans to come out and cheer. Can Marucho, Jenny, and Jewels defeat Tayghen?
The battle against Naga's troops continues as Julie and Billy team-up to take on the Subterra/Haos hybrid Bakugan called Tricloid, who has been powered up by Naga negative energy. At first the two seem to be overpowered, but the adaption of each other's battle styles may be what's needed to help them realize how to work as a team again, especially when Naga decides to crash the party. Shuji and Akira also appear trying to get strategies from their sister Nene. With help from Nene and her Ravenoid, Gorem and Cycloid defeat Tricloid by getting rid of the Negative Energy that Naga placed on her. At the end, Julie asks Billy out on a date.
Naga's troops have finally infiltrated Wardington after two defeats. Alice discovers that Tricloid's sister Rabeeder is invading the town. Little does she know the one she trained, Christopher, will also get involved in the battle. Dan is informed that Hairadee, Centorrior, and Druman are also approaching the city following Tayghen and Tricloid's defeat. When it appears these two are being overpowered, Klaus arrives. The three soon realize all that Rabeeder is doing is being controlled by her worry for her sister Tricloid. Alice starts doubting herself but Christopher helps her. Hydranoid defeats Rabeeder and is reunited with Tricloid as both of them return to Vestroia.
The return of Naga's Ventus/Aquos servant hybrid Hairadee has brought new troubles for Komba and Shun. While Skyress is trapped in a barrier of ice, Shun reveals his ninja skills to free Skyress and defeat the hybrid. Julio crashes the party and helps the battle. Will the three of them be enough to take Naga's servant on?
Dan and Runo stand as the only defenses against Centorrior and Druman. As Dan recalls his past battle with them, he realizes they don't have a chance without help. Julie, Billy, Marucho, Klaus, Julio, and Komba also get involved in the battle due to Hal-G doing a blurred transmission by Hal-G posing as Kato. Elsewhere Alice stands ready to help her grandfather, Hal-G, who appears to have fully become himself again. She takes him where Joe and Wayvern are. It's all a trick though. He unleashes Naga. Shun has suspected a trap though, so he shows up and fights Naga. When Joe gets captured, Chan-Lee frees him and joins the cities last line of defense by unleashing Fortress. While Drago is stuck battling the last of Naga's servants, Wayvern is in great distress.
Wayvern is calling to Drago to tell him that she needs help, the top ranked Brawlers must defeat Centorrior and Druman. Meanwhile Naga's negative energy is proving to be too much for Wayvern and Fortress. With Centorrior defeated, the others deal with Druman as Dan and Drago head over to where Naga. When Drago arrives, he fights Naga. With help from Julios, Runo has Tigrerra destroy Druman. Wayvern asks Drago to attack her so she can give him the Infinity Core. He does so, and Wyvern disappears. Drago becomes Infinity Drago. Drago then continues his fight with Naga. They both have 1000 Gs. In an epic battle, the two seem evenly matched. However, Hal-G sends out his 5th Paladins to assist Naga.
As Hal-G releases 5th Paladins, all seems hopeless until the Brawlers send their Bakugan to aid a wounded Drago. They destroy the 5th Paladins as Naga absorbs the 5th Paladins' energies. With the last of his power, Drago fires a brilliant burst of fire.
