Okay, what little Strifey means is that when you go into the map cards portion of the menu, you can click on a card to delete it. The max number of cards you can have is 99, so if you have that much, you can't get any more. So delete the useless cards (Almighty darkness, sleeping darkness and such, along with many of the green cards (Keep at least one of every level of card in every color though, more doors will need certain cards)). Then use a bountiful darkness card, (The one with a lot of heartless on it) to get a lot of heartless, and then it is all up to fate. If things get tough, you could always restart, but I doubt you will want too. And if you think Neverland is tough, wait till you get to the last floor, where you need to get a 1 blue card!