FIFA 2004 Codes -

Most teams' third kits:
Reach level 5 in your EA Bio.

French Ligue teams' third kits:
Reach level 10 in your EA Bio. Alternately, defeat all the teams in this league.

Italian Division 1 teams' third kits:
Reach level 20 in your EA Bio. Alternately, defeat all the teams in this league.

Spanish Premeira Liga teams' third kits:
Reach level 30 in your EA Bio. Alternately, defeat all the teams in this league.

English Premiership and German Bundesliga teams' third kits:
Reach level 40 in your EA Bio. Alternately, defeat all the teams in those leagues.

Seoul stadium:
Successfully complete championship mode.