Another world:
Push R1, Up, L2, Down when Push START becomes visible on the title screen. A small green wizard will appear in the lower right corner to confirm correct code entry. Start a new game and the phrase "Another World" will appear in the lower left corner. Select a regular puzzle game for 27 slightly faster levels with new backgrounds.

Character select:
Begin a puzzle game. Push Left(2), Up, Down, L1 + L2 + R1 + R2 at the map screen. A character select screen will become visible. Push Left or Right to select a character and Push X to continue. Although Bub will appear on the map screen, your new character will be in the game. If the CPU is defeated in Player vs. Computer mode, new characters may be selected during the next game.

More credits:
In the options menu, push Left, Right, R1, R2, L2, L1, Up, Down in the option menu. A 30-second timer will appear in the upper-right corner. Quickly highlight the "Credit" selection and repeatedly tap X or Circle to add up to 29 credits to the current total. REMEMBER: Returning to the option menu will reset the credits to the default value.