In Dead or Alive: Dimensions for the Nintendo 3DS, a couple characters have alternate outfits that can be used by hitting certain buttons on the character select screen.
A couple of these are hidden characters that must be unlocked, so check out my other guide to unlock the hidden boss characters in Dead or Alive: Dimensions for the Nintendo 3DS.
Kasumi Alpha With Braid – Press L + X
Kasumi Alpha With High Ponytail – Press R + X
Kasumi Alpha With Low Ponytail – Press L + R + X
Kasumi With Braided Hair – Press L + X
Kasumi With High Ponytail – Press R + X
Kasumi Low Ponytail – Press L + R + X
La Mariposa With No Mask – Press L + X
Lei Fang With Side Braids – Press L + X
Lei Fang With Short Ponytail – Press R + X
Random Select Shiden Costume 1 – Press L + X
Random Select Shiden Costume 2 – Press R + X
Random Select Shiden Costume 3 – Press L + R + X