This is kind of what I got from it, Instead of there being 6 main Guardian Bakugan like in the first season, there are 12, 6 for the Resistance and 6 for the Vexos. Spinmaster thought there wouldnt be enough episodes to fit everyones evolving period in so they just automatically made some of the guardians already be in their evolved forms. But SM wouldnt want to lose any money in real life so they still went ahead and made the toys.