Alternate costume colors...
	Extra options...
	Fight as Darkness...
	Fight as Inoz...

Press the various Punch and Kick buttons while choosing a fighter on the character selection screen.

Accumulate over ten hours of total game play. An "Extra options" selection will appear on the options menu.

Accumulate over five hours of total game play. Darkness will now be selectable at the character selection screen.

Accumulate over two hours of total game play. Then, hold L while choosing Mamazo at the character selection screen.