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Dreamcast - Bust-A-Move 4 cheats

Go to the title screen and press the following button combination:
If the codes are accepted, you should hear a sound.

Unlock tarot reading in options menu: Press Up, X, Down, X, Up. 
Unlock bonus characters: Press Right, Right, X, Left, Left.
Unlock more puzzles in arcade mode: Press X, Left, Right, Left, X.
  
Unlock Talk demo options
Activate Bonus characters and Tarot reading codes. After press 
the following button combination att the title screen:
X, Up, Left, Down, Right, Up, X, Down, Left, Up, Right, Down + X 
If the code is accepted, you should hear a sound.

Unlock Tarot reading in options: 
Finish the story mode once.