Chain of Memories Floor 2: Wonderland

Question:
You know when you get to pick your world after Traverse Town? I picked Wonderland and well...i battled all of the heartless and hit the doors, but I cant get them open. How do I proceed and get the doors open? I know you may have to have cards and I got some by battling those heartless, but as I said, I have no idea how to move on. Can anyone help me?? :)

 

You have to select the right card and press A.

 

You have to do this and make sure the card value on the door is the same or greater than the value on your card...Also make note of the fact that the type of card you pick on the door will deturmin whats in that room like "teeming darkness" will produce a room with a lot of heartless and "lurking Darkness" there is fewer heartless and they hide alot. HTH