A code to unlock Boss Rush mode in Scott Pilgrim vs. The World: The Game was intended to be released by other means which have never seem to come to fruition, so here are the codes for their respective consoles courtesy of a Ubisoft artists’s blog:
PSN version: right, right, circle, R1, right, right, circle, R1
XBLA version: right, right, B, R1, right, right, B, R1
Scott Pilgrim also has a “blood code” which replaces a hit spark with a pink, heart-shaped splash. To enable this effect, use one of the following codes on your console.
PSN version: X, circle, X, square, X, circle, circle
XBLA version: A, B, A, X, A, B, B