David Beckham Soccer cheats and cheat codes for Gamecube

Choose the Professional Player Certificate in Train With Beckham mode 
to unlock a following bonuses:

Unlock Edit Player option in Game Settings"
Reach minimum 5 goals in "Free Play". The "Edit Player" option.

Unlock Manchester Eleven team in the Beckham's Teams group:
Reach minimum 20 points in "Target Free Kicks"

Unlock World All-Stars team in the Beckham's Teams group:
Reach minimum 20 points in "Target Passing"

Unlock England Eleven team in the Beckham's Teams group:
Reach minimum 20 points in "Target Crossing"

Unlock Classic match games
Reach minimum 15 points in  "Target Shooting".
Go to the "Classic Match" option in arcade mode to access 
classic match games.

Unlock Aztec Arena and Bouncy Castle stadiums
Finish "Panel Bash" at least 10 seconds within, then go to 
the "Game Settings" option in Friendly Series mode.

Real team names:
Aston: Aston Villa
Barcelona: FC Barcelona
Berlin: HBSC
Bianconeri: Juventus
Bilbao: Atletic
Blackburn: Blackburn Rovers
Blancos de Sevilla: Sevilla
Bolton: Bolton Wanderers
Bremen: Werder Bremen
Charlton: Charlton Athletic
Derby: Wolverhampton
Dortmund: Borussia Dortmund
Gelsenkirchen: Schalke
Highbury: Arsenal
Internazionale: Inter Milan
Ipswich: Birmingham City
Lens: RC Lens
Madrid: Real Madrid
Manchester: Manchester United
Metz: FC Metz
Milan: AC Milan
Munich Blues: 1860 Munich
Munich Whites: Bayern Munidh
Paris: Paris SG
Rayas de Sevilla: Betis
Roma: AS Roma
Sunderland: Manchester City
Tottenham: Tottenham Hotspur
Vigo: Celta 
West Ham: Portsmouth