Bakugan: Gundalian Invaders (爆丸バトルブローラーズ ガンダリアンインベーダーズ, Bakugan Batoru Burōrāzu: Gandarian Inbēdāzu) is the third season a part of Japanese anime television series Bakugan Battle Brawlers. It has 39 episodes in length total, and is produced by TMS Entertainment and Maxpire Entertainment, which replaced Japan Vistec, which is in charge in animation in the last two seasons. The series premiered in Canada on May 23, 2010, and in the United States on May 29, 2010. This season ended on January 29, 2011 and is followed by a fourth season. In Japan it premieres on April 3, 2011, taking over the time slot of LilPri at 9:00 AM.
Bakugan Interspace has gone active all across the Earth, and kids are having fun testing their skills against Dan, Shun, and Marucho. However the Brawlers soon learn some Bakugan were sent into an alternate dimension when Vestroia became six different groups. These Bakugan are now at war with each other as the Gunadlians and the Neathians fighting for control of their dimension and looking to recruit the strongest Earthlings to their cause. When the battle spreads to Bakugan Interspace, the Brawlers must decide which side they will join and how they can keep other kids from falling into the politics of war.