Yoshi's Cookie Cheats (GameBoy)

Enter the options menu and set the speed to high, music off, and level to 10. Then,
highlight the "Level" option and tap Select until the desired level is displayed. During
a game, cookies will be transformed into monsters.

Set the music to off, the speed to high, and the round to 10. Hold Up and press Select.
The round should read "11." Continue to advance to higher levels by pressing the Select
button.