Go to the 1st level then press Start to pause the game. Go to the scrapbook screen and press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B, Up, Up, Up, Up, Up. You will hear a phrase "That's what I call spreading joy" if the code is entered correctly.
Go to the 1st level then press Start to pause the game. Go to the scrapbook screen and press Left, Up, A, B, Left, Up, A, B, Left, Up, A, B, X, B, X, B, X, B. Now exit the screen and exit the level and go to the Bonus Option. You will hear a phrase "That's what I call spreading joy" if the code is entered correctly.