Level select
Go to the first level, pause the game, and go to the "Scrapbook" option. Then, press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B, Up(5). If you entered the code correctly, the phrase "That's what I call spreading joy" will be spoken.

All bonus games
Go to the first level, pause the game, and go to the "Scrapbook" option. Then, press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B, X, B, X, B, X, B. Exit the "Scrapbook screen, quit the level, then select the "Bonus" option.

Full health
Go to the first level, pause the game, and go to the "Scrapbook" option. Then, press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B, Up, Right, Down, Left, Up. If you entered the code correctly, you will hear a sound.

1,000 coins
Go to the first level, pause the game, and go to the "Scrapbook" option. Then, press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B(6). If you entered the code correctly, you will hear a sound.