Bakugan Battle Brawlers

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 and the evil Bakugan "Naga". They are put under a spell and are convinced to take Dan and the other Battle Brawlers out of the picture.

The Brawlers head off to Bakugan Valley looking for the 'Infinity Core'. During the search, they run into Billy and Komba (Julies childhood friends), who challenge them to a high stakes battle. Masquerade has recruited Billy and Komba to send the Brawlers' Bakugan to the Doom Dimension! Shun has to sacrifice a powerful Bakugan to save Gorem.

While the Bakugan Battle Brawlers continue their search for the Infinity Core, Shun becomes convinced that someone is spying on them.

While searching their website for information on the Infinity Core, the Brawlers discover a lead, which takes them to a huge castle in Germany. There, they meet the number two world ranked Bakugan player, Klause Von Herzon. Klause challenges Marucho and his Bakugan Preyus to a battle. The battle is intense and results in Preyus being sent to the Doom Dimension!

Runo and Marucho discover a control room in Klause Von Herzon's castle with a display of rankings of all the Bakugan players from around the world! There, they are confronted by a Bakugan player named Julio. Runo accepts the challenge to battle, but isn't strong enough to defeat him. Dan jumps into help, but Julio is too powerful.

Julie finds herself in a brawl with her childhood friend Billy in order to save him from Masquerade.

Dan and Shun have a falling out and Shun takes off on his own to seek out and destroy Masquerade.

The Brawlers are ambushed by three of Masquerade's gang. A triple battle ensues and to the shock of Marucho, his Bakugan Preyas is under the control of the bad guys. It's a tough call for Runo and Dan as they battle Preyas, but they come up with a plan to get him back on their side. Marucho is overjoyed to have his Preyas back, but the challenge isn't over yet!

Dan, Marucho and Runo enter into battle with Klaus, Chan and Julio to try to find out where Masquerade is hiding.

The Brawlers have reason to suspect the webmaster by the name of Joe is spying on them.

Alice befriends a young Bakugan player named Christopher. He loves his Bakugan but is always losing and is on the verge of throwing his Bakugan away. Alice convinces him that battling is more than just skill and power; it's about confidence. In a fierce brawl against a seasoned Bakugan player, Christopher takes Alices' advice and tastes victory for the first time!

Runo suspects Alice is secretly spying on the Brawlers and giving information to Masquerade. Dan and Runo face off against three skilled Bakugan players and Alice surprises them by showing up. In order to prove her loyalty she urges Runo to change her battle strategy. The hot headed Runo doesn't trust her and plays her own game, with devastating results.

Masquerade turns on his own gang and battles them, sending all of their Bakugan to the Doom Dimension! He then vows to defeat all of the Battle Brawlers and send their Bakugan to the same fate. In a strange twist, Runo decides to retire from the Brawlers. The group must convince her to stay. Only the combined strength of all the Brawlers will give them a chance against the powerful Masquerade!