At the Title Screen, press Right, Right, Right, Triangle, Left, Left, Left to enable extra characters.
On the title screen with the Press Start flashing and enter the following code: Right, Right, X, Left, Left. You will hear a cheering sound if you entered the code correctly. Now at the character select screen you will have more characters to choose from.
At the Title Screen, press Up, Triangle, Down, Triangle, Up. Now go to Options to find the new Tarot Reading selection.
First enter the two codes above. Now at the Title Screen, press Square, Up, Left, Down, Right, Up, Square, Down, Left, Up, Right, Down, Square. You'll hear a sound to confirm. Check the Options menu for the new Talk Demo mode.
At the Title Screen, press Triangle, Left, Right, Left, Triangle. You'll hear a sound to confirm. Now choose Puzzle and then pick Arcade mode. Choose your difficulty level and then you'll be able to play a ton of new stages.
Thanks to Revolution readers Levi Dahlke, Mike Lemense and Jeremiah Warner!