PlayStation 2 :: Karaoke Revolution Cheat Codes
One Week
Successfully complete challenge mode to unlock the One Week song.
Ladies Night
Successfully complete arcade mode on the beginner difficulty setting with at least a "Gold" rank on all songs to unlock the Ladies Night song.
Smooth Criminal
Successfully complete arcade mode on the intermediate difficulty setting with at least a "Gold" rank on all songs to unlock the Smooth Criminal song.
Science Genius Girl
Successfully complete arcade mode on the advanced difficulty setting with at least a "Gold" rank on all songs to unlock the Science Genius Girl song.
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u must complete at least 1 song from every place you perform at in order to unlock smooth criminal one week science genius girl and as for people u can unlock a punk with a mohawk named kat a peaceful looking girl that is a hippie named hamony a cl***y dude that unties his bow tie whenever he sings and u can also unlock clothes for them