Instructions
Avoid the snowballs thrown by Franz Coughka. Standing really close to Franz allows you to avoid most snowballs. He releases penguins from his hat.
Jump on the penguin's head and press the bounce button to rise higher into the air.
After you spring off the penguin position Garfield directly over the hat. Press the A and B buttons at the same time to perform the ground stomp. Repeat the process two more times to defeat the final boss.