if your opponent attempts for a critical k.o. an knoks off both bakugan both bakugans get captured
What are you referring to? In the game when two bakugan ( one from each player ) are on the same card then a battle begins and if you land a second bakugan on a card the rules are in place so you either move one to another or win that gate card. And finally, bakugan dont ever get "captured" So i am really clueless as to what you are referring to. I could understand maybe using s me strategy and trying to know your opponents bakugan off of a gate card ( would have to get some more official rulings on how that would work )