Launch 'Pets LIVE' and press 'My Team' (don't press 'Recruit'). Under 'Team Code' enter 'pets', so the message 'Uh-oh: Unable to find anyone with that team code' appears on screen. Then enter CYY5V. Now go to 'Home', 'My Profile', and finally 'Skill' and you will notice that you have another 50 defense points.