Bonus Menu:
     Go to the OPTIONS menu and hold Up + Block + Run until the screen
shakes.

Background Select:
     At  the  character  select  screen,  highlight  Sonya  and  press
Up+Start. After you select your character, you can then toggle through
the backgrounds to choose the one you want.

Play as Chameleon:
     To  play  as  Chameleon  choose  any  male Ninja at the character
select  screen.  Press  and  hold Left, High Punch, Low Punch, Run and
Block until the match starts.