a)ok.this is confusing. once i went to one of 'em cheat websites and once they said that if you finish sa2 with sonic/shadow with or without "A" rankings, you could get alternate costumes in 2 player mode. well i've finished the game. even the "last" stage but i don't see any new costumes. is there anything else i need to do or were those guys just lying? b)after finishing the last stage, in the story, what did sonic give to rouge?thanks.
You have to complete all the missions, but you don't have to get "A" rank to get the new costumes. He apparently gave her a jewel or letter.