Six planets form the Vestroian star system, and each one hosts a different species of Bakugan. When experimental weaponry carries the Bakugan off to Earth, humans at first receive them warmly. That goodwill ends when teens begin bonding with Bakugan partners, and with that bond comes the power to become enormous. Amid the fear this stirs, an event called the Catastrophe occurs. Expect an action fantasy series in the Bakugan franchise.