http://www.projectsae.es/foros/viewtopic.php?f=5&t=291&p=1845#p1845
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Yuna
Sabado, 24 Enero 2009, 13:37

Re: Trajes
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Esto lo he tomado de una guía de gamefaqs:

[quote]- COSTUME: There are four costumes to choose from:  Normal, Special1,
Special2, and Special3.  The Normal costume is the default white blouse and red
scarf.  Special1 costume features a dark brown cardigan and cute little gloves
(they look like driving gloves).  The Special2 costume has a deep blue blouse
with a fancy design on the back and white stockings (with garters!); Miku even
has blue hair!  The Special3 costume has a dark cardigan and patterned scarf,
leather skirt, black stockings; also Miku wears pale lipstick and has a darker
complexion.  But apart from being cute, when Miku wears a Special costume she
will run just a little bit faster!!  Costume1 becomes available after you
defeat the game for the first time.  To unlock Costumes 2 & 3, you must also
beat the game in Nightmare mode.[/quote]

En total son 4 trajes (el quinto es de xbox, así que nada). Al parecer para desbloquear los trajes tienes que jugar en modo difícil.