For marluxia, you have to put about five, six zero cards in the beginning your deck. next put only six, seven, eight, & nine value cards in your deck beside the zeros. and last put the darkside enemy card in your deck & make sure you have enough cp. in the battle, use the darkside card when marluxia uses "double sleight". then keep trying to use trinity limit and other sleights. for marluxia redux, use the same deck, except take away darkside & put in the marluxia enemy card & use the same thing that you did for regular marluxia. i did the same thing, but it didn't work for a few trys. but still worked.