Dragon Ball: Evolution (Sony PSP)

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Alternate costumes

Hold L + R while choosing a character at the selection screen.

Characters

Complete the indicated task to unlock the corresponding character

Chi-Chi: Complete Story mode.
Fu Lum: Complete Story mode.
Mai: Complete Story mode.
Neo Piccolo: Complete Secret Act 2.
Oozaru: Complete Story mode.
Piccolo: Complete Story mode.

Secret Act 1

Get an "A" or better rank on all twelve acts.

Secret Act 2

Successfully complete Secret Act 1.