After you unlock Setsuna, you have access to a place with a "?". Setsuna ask you to put 4 donuts card to a certain order for unlocking stuff, here's the combinaison.

Password	Effect
3 4 3 1	Movie Battle
1 2 4 2	Unlock Clothes
1 4 3 2	Unlock Clothes
2 3 1 2	Unlock Clothes
3 1 3 4	Unlock Clothes
4 3 2 1	Unlock Clothes
4 4 2 1	Unlock Clothes