In the parallel world of Vestroia, a powerful Bakugan in search for power
(a small marble magnetic sphere which when thrown on a gate card turns
into a highly strong and powerful warrior) named Naga decides to absorb
the energy of the two opposing cores that preserve the balance and peace
in Vestroia. However he absorbed too much power and energy found within
the Silent Core, the source of negative energy. The Infinity Core, the
source of positive energy had been absorbed by Wavern.
In the first season, the story centers on six friends who find metallic
cards which have fallen from the sky or to be more precise, Vestroia itself.
They name themselves the Bakugan Battle Brawlers and consist of seven
children: Dan, Shun, Runo, Marucho, Julie, Alice, and later Joe. Together
they learn more about the origin of the Bakugan, Vestroia, the game involving
them, and the battle against the Doom Beings.
In New Vestroia, Dan, Marucho, and Shun are called to the newly restored
Vestroia to stop an alien race called the Vestals who invaded it. They
allied with the Bakugan Battle Brawlers Resistance: Mira, Ace, and Baron
in order to stop an evil group as the Vexos from taking over New Vestroia,
and possibly, the whole universe.
In Gundalian Invaders, Dan, Marucho, Shun and Julie get caught up in a
war between two different alien factions in another universe, and teaming
up with three new brawlers, Princess Fabia, Jake (who is from Earth),
and Ren (who is an undercover Gundalian) in order to stop the evil Gundalian
Protectors, the Twelve Orders from destroying Neathia, and possibly, Earth.But
Ren is secretly trying to get the gundalians to win the war , so Fabia
and her planet has been trusted by the battle brawlers and hopefully they'll
protect Bakugan Interspace , Neathia < Fabia's home planet. > and