Karaoke Stage - Platform: Playstation 2

All songs:
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Press Circle, Square, Circle, Square, Up, Down, Left, Right, L3(2) at the title screen. 
Note: The game cannot be saved when this code is enabled.

All characters:
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Press L3(2), R3, L3, Up, Left, Up, Right, Square(2) at the title screen. 
Note: The game cannot be saved when this code is enabled.

All venues:
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Press Circle, Square, Circle(2), Up, Down, Left, Down, R3(2) at the title screen. 
Note: The game cannot be saved when this code is enabled.

All costumes:
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Press Square, Circle(2), Square, Up, Down, Left, Right, R3, L3 at the title screen. 
Note: The game cannot be saved when this code is enabled.

All videos:
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Press Square(2), Circle(2), Up, Left, Right, Up, L3, R3 at the title screen. 
Note: The game cannot be saved when this code is enabled.

Small head:
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Press Down(2), Up(2), Left, Right, Down, Up, Circle, Square during game play.

Big head:
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Press Up, Down, Up, Down, Right(2), Left(2), Circle, Square during game play.

Big eyes:
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Press Up(2), Down(2), Left, Right, Left, Right, Circle, Square during game play.

Transparent character:
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Press Right, Left, Right, Left, Up(2), Down(2), Circle, Square during game play.

Shiny character:
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Press Left, Right, Left, Right, Down(2), Up(2), Circle, Square during game play.

Chrome character:
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Press L3, R3, Right, L3, Up(2), Left, Up, Square, Circle during game play.

Dark character:
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Press R3, L3(2), R3, Square, Circle, Right(2), L3(2) during game play.

Banana microphone:
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Press R3(2), L3(2), Down(2), Right, Left, Circle, Up during game play.

Toothbrush microphone:
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Press R3(2), L3(2), Down(2), Circle, Square, Circle, Square during game play.

Switch character gender animation:
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Press L3, R3, L3, R3, Down(2), Up(2), Down, Square during game play.

Tough crowd audio:
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Press R3(4), Up, Left, Right, Down, Circle(2) during game play.

One Week song:
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Successfully complete showtime mode.

Ladies Night song:
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Successfully complete arcade mode under the beginner difficulty setting with at 
least a "Gold" rank on all songs.

Smooth Criminal song:
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Successfully complete arcade mode under the intermediate difficulty setting with 
at least a "Gold" rank on all songs.

Science Genius Girl song:
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Successfully complete arcade mode under the advanced difficulty setting with at 
least a "Gold" rank on all songs.

Play as Bub:
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Complete a song in showtime mode with a "Platinum" rank.

Play as Cherry:
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Complete a song in showtime mode with a "Platinum" rank.

Play as Harmony:
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Successfully complete arcade mode under the intermediate difficulty setting with 
a "Platinum" rank on all songs.

Play as Kat:
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Successfully complete arcade mode under the beginner difficulty setting with a 
"Platinum" rank on all songs.

Play as Martin:
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Successfully complete arcade mode under the advanced difficulty setting with a 
"Platinum" rank on all songs.

How You Remind Me video:
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Successfully complete showtime mode with at least a "Platinum" rank on all songs.

Like A Virgin video:
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Successfully complete showtime mode with at least a "Gold" rank on all songs.

One Week video:
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Successfully complete one song in each of the areas in showtime mode.

Outtake video:
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Successfully complete all songs in showtime mode.

Alternate costumes:
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Successfully complete any song in showtime mode with a "Gold" or "Platinum" rank 
to unlock alternate costumes for one of the default characters. Note: A "Platinum" 
rank will unlock two bonus costumes. Also, not all characters have alternate costumes.

Easier songs:
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You can fake the game by humming, rather than singing, at the correct pitch.