Quote Originally Posted by Skyblade

Um, no he doesn't. You must be thinking of someone else.

I don't know what you people are talking about. Part 1? You only face Marluxia once, at the game's end. He doesn't use either sleights or zero cards. Load a deck with 8 and 9 value attack cards, a couple Potions/Hi Potions, a few Cure spells, and then let loose on him. It takes a long time to kill him, since his health bar is huge and you can't always attack him, but you can break all of his attacks easily, since he doesn't seem to use any higher than 7.
He is talking about he human version of Marluxia that wield that scythe of his.

Here is a few Sleights that he used.

Deathscythe: He swings the scythe and creates a huge magical slash
to hit Sora.
Blossom Shower: He creates a big twirling tornado of rose petals that
circle around him and the area near him. If you're
inside the petals range, it hurts Sora.

Then Sora will realize that the Marluxia is a fake and the real one is inside that door which rides on a big machine.