Argentina League:
Hold L Trigger and enter Square, Circle, Triangle

All International teams and cups:
At the game mode screen hold Triangle and enter Square, X, X, Circle, Triangle, Triangle.

All Stadiums from every League:
Hold Square and enter Triangle, Triangle, Triangle, Circle, Circle, L Trigger.

Complete Challenge mode:
Hold L TRIGGER and enter Square, Circle, Square, X, Circle

Unlock Custom Challenge:
Complete all the challenges in 'Challenge' mode.