Dan and Runo are at the amusement park, but their day of fun turns into a colossal quarrel when they can't agree on what ride to go on next. Their feud is interrupted when they hear the loud excited cheers of a crowd across the park. Two brothers, Kenta and Kenji are performing their magic act and Dan and Runo are invited on stage to assist in a card trick. When Dan is offered to pick a card things go from bad to worse when his choice is revealed to be a Doom Card. It just so happens that Kenta and Kenji are working with the mysterious Masquerade and they trick Dan into doing battle with them. The brothers agree two against one isn't a fair fight so they offer to fight both Dan and Runo at the same time in a combination battle. And with all their ability cards on the battlefield, both duos will have to conjure up some real magic if they want to keep their Bakugans from being sent into the Doom Dimension!