Dead Or Alive: Dimensions [3DS]

Alternate costumes
Hold the indicated buttons while selecting the listed character, then press A to use the corresponding costume.
Kasumi Alpha (braid): Press L + X.
Kasumi Alpha (high ponytail): Press R + X.
Kasumi Alpha (low ponytail): Press L + R + X.
Kasumi (braided hair): Press L + X.
Kasumi (high ponytail): Press R + X.
Kasumi (low ponytail): Press L + R + X.
La Mariposa (no mask): Press L + X.
Lei Fang (side braids): Press L + X.
Lei Fang (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.

Geo-Thermal Plant stage
Successfully complete Arcade mode.

Bosses
Complete Chronicle mode, then finish the indicated task to unlock the corresponding Boss.
Alpha-152: Complete Mission 19 in Tag Challenge mode.
Genra: Complete Mission 18 in Tag Challenge mode.
Kasumi Alpha: Complete Tag Challenge 16..
Raidou: Complete Tag Challenge 20..
Shiden: Complete Tag Challenge 20. Select by holding L+X and Press A on Random..
Tengu: Complete Mission 17 in Tag Challenge mode.

Character menu voices
Win a round in Survival mode.

Tina goes sledding
Play as Tina against any opponent at either "Frozen Peaks" or "The White Storm." Get your opponent backed up against the edge of a hill and execute a throw while pressing in the direction towards your opponent. Instead of the normal scene transition, Tina will throw her opponent face down into the snow, sit on his or her back, and use him or her as her personal sled as she slides down the hill.