Unverified. Go to the cheat menu and enter the following!

17345 - Puts you at club level in Livin' Da Life

11910 - Puts you at Pro level in Livin' Da Life

39572 - Unlocks everything in Livin' Da life clothes, music, moves(5*level)

50361 - Unlocks moves in Livin' Da Life (5* level)

78727 - Unlocks music in Livin' Da Life

20014 - Unlocks clothes in Livin' Da Life

34589 - Unlocks everything in Jam mode levels, characters and music

35535 - Unlocks character Host 1

61275 - Unlocks character Rack

85363 - Unlocks all Jam mode characters

92750 - Unlocks all Jam mode levels

85872 - Unlocks all Jam mode music

43649 - Shows all moves in the movelist (works in both Jam and Livin' Da life)

93665 - Unlocks character Crazy Legs

83083 - Unlocks Red Bull King of The Ring

15483 - Always have maxium hype (seems to apply it to opponent too)

56239 - Hides the beat marker (makes being on beat harder can't see the beat marks)

41549 - Turns the HUD off in battles (doesn't show song track and what move your doing)

26939 - Clears all the cheats

Always win "beat" medal - Open the PS2 drive when opponent is about to throwdown this stops the beat thus meaning they can't hit any beats close drive again when it's your turn and win the beat medal! (From what I've been told it works on PSP not sure how as I don't own one)