A long time ago, a strange event took place on Earth, 12 years after it, Dan and his friends found things they never knew existed, the Bakugan. In the present day, Dan is encountered by a boy named Magnus. Dan's Bakugan, Drago, tells Dan that they've been challenged to a battle. Dan looks at this red ball and throws it, which transforms into a dragon-like creature - a Bakugan. believes they should tell everyone the BakuCores and Bakugan, they should post their discoveries online, but apparently, they weren’t the only kids who found Bakugan who found at night, adults couldn’t open them though.