Changes

[[File:Dan Gear Core.png|right|thumb|[[Dan Kouzo]] throwing a Baku-Gear Core]]

''[[Armored Alliance]]'' introduces BakuCores that can add [[Baku-Gear]] to the Brawler's Bakugan. These BakuCores have their [[Faction]] symbol in addition to the Faction-based coloration. The latter half of the season also introduce Fusion Cores, which allowed a pair of Bakugan to fuse when they are rolled out onto them.

''[[Geogan Rising]]'' introduced a fourth kind of BakuCore, the Geogan Cores (or GeoCores for short), which are similar to the Baku-Gear Cores but with different color and had the ability to summon [[Geogan]] to the battlefield. The Geogan replaces the Bakugan that the Core is applied to, and once their purpose is fulfilled will return the Bakugan they replaced.