Unlock characters:
Select Battle Mode. At the character selection screen, hold L + R + Z then quickly enter one of the following codes:

Arii:
A, Y, B, X, Y.

Briggs (alternate costume):
A, B, X, Y, X.

Carla:
A, Y, A, A, A.

Chukklez:
Y, Y, B, A, X.

Cruz:
X, B, A, A, X.

D-Mob:
Y, B, Y, A, X.

D-Mob (alternate costume):
Y, Y, B, Y, Y.

Dan G:
A, X, A, X, Y.

Deebo:
X, X, A, A, B.

Deja:
X, Y, X, X, A.

DMX:
X, A, X, B, Y.

Drake:
A, B, B, X, X.

Funkmaster Flex:
X, B, X, X, Y.

Headache:
B, B, B, Y, X.

House:
B, A, B, X, A.

Iceberg:
Y, B, X, Y, X.

Ludacris:
X, X, X, Y, B.

Manny (alternate costume):
X, Y, X, Y, X.

Masa:
A, X, B, Y, Y.

Method Man:
Y, X, A, B, X.

Moses:
B, B, Y, Y, A.

N.O.R.E.:
X, Y, B, A, X.

Nyne:
Y, X, A, A, B.

Omar:
X, X, Y, B, B.

Opal:
X, X, Y, Y, B.

Peewee:
A, A, Y, B, Y.

Peewee (alternate costume):
A, B, B, Y, X.

Penny:
A, A, A, B, X.

Pockets:
B, Y, X, Y, A.

Proof (alternate costume):
A, Y, B, Y, X.

Razor:
B, Y, B, X, A.

Razor (alternate costume):
Y, X, A, B, B.

Redman:
X, X, B, Y, A.

Ruffneck:
A, Y, A, B, Xe.

Ruffneck (alternate costume):
Y, X, B, A, Y.

Scarface:
X, Y, A, B, Y.

Sketch:
B, B, X, Y, A.

Snowman:
B, B, A, A, X.

Spider (alternate costume):
Y, B, A, Y, X.

Steel:
A, B, X, X, B.

T'ai:
X, X, Y, A, X.

Tank (alternate costume):
B, Y, X, A, A.

Zaheer:
B, Y, A, A.