Evolution (Generation 1)

	This article needs cleanup. Please help us by adding to or copyediting the article.

For Evolutions in Reboot Series, see Evolution (Generation 2).

For Special forms from Bakugan: Evolutions, see Elemental Evolution.

After a Bakugan brawls enough, it has the power to become an Evolved Bakugan. These Bakugan keep their original Attribute (although in some cases they gain one) but they gain higher G-Power and slightly appearance difference. Dragonoid was the first Bakugan to evolve, evolving into Delta Dragonoid during Dan's, Marucho's and Runo's battle with Klaus, Julio and Chan Lee. All of the brawlers had their Bakugan evolve during each brawler's respective battles with the Six Legendary Soldiers of Vestroia. When Bakugan evolve, the Ability Cards that come with them shatter and a new one takes their place, meaning old Ability Cards involving the un-evolved Bakugan's Ability Cards become useless. Most evolutions in the anime seem to be unnatural, and are caused because of a Bakugan receiving special energies.

Special Cases

There are some special cases when Bakugan go through particular Evolutions. One example are Hydranoid and Drago, who evolved twice in the original series. Drago, in fact, evolved, if Infinity Dragonoid and Perfect Dragonoid count, a total of 11 times. There are also some strange cases where instead of changing they reproduce their evolution, such as Preyas' evolutions. There is also one case with Drago where he down grades from Perfect Dragonoid to Neo Dragonoid when the Six Soldiers gave Drago a new body.

Dharak/Razenoid's case also deserves to be called a strange evolution. As a result of being swallowed up by the Sacred Orb, Dharak was encased into armor made from his own inner evil. Initially used as a punishment for Dharak's evil deeds, the armor of evil actually made Dharak much stronger, transforming him into Razenoid and making him a formidable opponent for Drago once again.

His second evolution that caused him to assume an unnamed form (Evolved Razenoid) should also be considered a strange one, as Razenoid didn't evolve through battle experience neither did he receive an energy item to kick-start the evolution process. Instead, he underwent a so-called "Process of Catharsis" to unleash his dormant power, and was seen in an object resembling a cocoon, which can possibly mean that Razenoid's first form was the "larvae" form of his true self.

Chaos Ability X

Gus and Spectra found a Forbidden Ability Card known as Chaos Ability X. The effect is a forced evolution that Spectra has been using this card to evolve Bakugan to create an army. So far the targets have been the Bakugan the Vexos threw out: Mega Brontes and Elico. Gus' own Premo Vulcan was also a subject of the card's power. Spectra once talked about it when he had Drago. In some cases the Card's side effect takes away the Bakugan's free will, as seen in Brontes' case. Vulcan and Elico, however, retained their free will.

Razenoid

When Phantom Dharak entered in contact with the Sacred Orb, he was teleported to a dark reverse dimension of the Bakugan Interspace. During his time in there, his body entered in a state of metamorphosis, mutating him into Razenoid. This mutation can be considered a type of evolution in some points of view.