bakugan battle brawlers for ds how to get the gaurdian bakugan of differeint attribute

help bakugan battle brawlers for the ds i need to know how to get a darkus preyas out side of battle + an aquos preyas to i know aquos preyas but not darkus i have don it befor but it was so long ago i dont remaber how oh and if aneone his any info on other gaurdian bakugan attribute other then the original attribute or if it is a glitch and if you do know how to get bakugan like naga and his sistr or bagugan like further evolveins of drago or hydranoid to 3 form or more it would be good to know and be a good help thaks

idk

You can't get Naga or Wavern in the game and Preyas only comes in Aquos form but he can change attributes when he stands on a gate card.