Alternate costumes...
	Characters...
	Secret Act 1...
	Secret Act 2...

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

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.

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

Successfully complete Secret Act 1.