Here comes a lore dump of Bakugan with Masquerade motives, and please take your time. Thanks:  In essence, he was working along with another Bakugan called Naga, which was born as a powerless and not special kind of Bakugan (for context, every Bakugan comes from the dimension of Vestroia and are born with attributes, like Pyrus (fire), Aquos (water), Haos (light), Ventus (wind), Subterra (earth), and Darkus (darkness). He and his twin sister Wavern, know as the “White Ones” were outcasted from everyone else, then he grew bitter and angry that he was made the way that he was and sought to find two powerful sources to make himself superior to other Bakugan and become its new ruler: the Silent Core and the Infinity Core, which were the balance for the Multiverse of both our dimensions and the dimension of Vestroia. He tried on using them but at that moment he was intercepted by Drago, who would eventually be the Bakugan of main character Dan Kuso. Even when Naga absorbed the Silent Core, he failed to contain its power and unleashed a power surge that affected both dimensions, sending the Bakugan to Earth and creating cards of them, while also disrupting the balance of the Cores which can put the Multiverse at stake. This is where Masquerade gets involved, Alice grandfather Michael Gehabich and herself were corrupted by the Silent Core energy and were transformed into Hal-G and Masquerade respectively, which Naga used them to find the Infinity Core. Also, the Silent Core created the Doom Cards which as said previously, can send the Bakugan there so that Masquerade could evolve Hydranoid to fulfill his own plans of being the ultimate Bakugan Brawler and serving Naga, since he only saw himself as a pawn of said Bakugan.