Backyard Soccer 2004 Codes -

Hint: Better performance:
When a player is in a game on his or her birthday, they will have better performance. You can learn their birthdays by looking at their cards.

Twins play better when they are on the same team (Ashley and Sidney Webber, and Achmed and Amir Khan). However, Tony and Angela Delvecchio play better when facing against each other.

Maria plays better when wearing a pink uniform.

Younger versions of professional players will play better when on their real MLS team.