Instructions
Research lists of available Bakugan Balls online. Many fan sites, wikis and forums provide extensive databases of available Bakugan; take note of their colors and appearance when they have popped open.
Examine the outside of the Bakugan Ball. You should be able to tell from the colors which Bakugan lies inside. For example, a Darkus Stinglash is pale purple and the color of the ball will be the same.
Study the grooves and hinges covering the exterior of the ball. Keep the shape of the transformed Bakugan in mind and you should be able to ascertain from the ball segments whether the Bakugan will have feet or the ball has a lid that pops open on top.